Most material discussing the Arab-Israeli conflict constrains the timeframe or geography to advance a particular narrative. This post attempts to provide the longer and broader context needed for a more nuanced understanding.

Jews and Judaism

The Jews are a people (an ethnicity). Ethnicity is a hereditary trait: children born to Jewish parents are Jews; a Jew cannot convert, for example, to being Chinese. The Jewish people originated at least 3500 years ago in the Levant, which is a part of the Middle East, and Jews are indigenous to that region. There are roughly 15.7 million Jews worldwide as of 2023.

Judaism is a religion. Religions are belief systems; you can convert to Judaism or Christianity or Buddhism by changing your beliefs. Judaism originated among the Jewish people and most practitioners of Judaism today are Jews. Unlike Christianity and Islam, Judaism is not a proselytizing religion – there is no religious obligation or incentive to convert others. As a result of this tight coupling of ethnicity and religion, Judaism is often referred to as an ethnoreligion. Today, “Jewish” is commonly used to refer to both the ethnicity and the religion.

Christianity and Islam descend directly from Judaism; both are proselytizing religions. As a result, they have spread rapidly, often through conquest and forced conversion. The unwillingness of many Jews to convert has resulted in extensive persecution, with Jews frequently killed or forced to flee. The dispersal of Jewish refugees globally is referred to as the Jewish diaspora. Today, the large majority of Jews live in either Israel or America.

Ancient Israel

The ancient Jewish kingdoms of Israel and Judah (from which the name Jew derives) covered an area slightly larger than modern Israel and the West Bank (Judea and Samaria). There is extensive archeological record of the people and kingdoms of Israel and Judah starting in the Iron Age such as the Egyptian Merneptah Stele circa 1200 BCE. Jews of this time spoke Hebrew and the kingdoms of Israel and Judah existed for many centuries.

Israel and Judah were conquered by a series of invaders, starting in 720 BCE, including the Assyrians, Babylonians, Persians, Romans, Greeks, Arabs, Turks, and British. While Israel existed as a vassal state under several conquering empires, repeated Jewish rebellions resulted in the Roman empire ethnically cleansing many of the Jews who fled to surrounding countries and eventually as far as Europe. This was the start of the Jewish diaspora. The Romans also changed the name of the region to Syria Palestinia in an attempt to eradicate the Jewish identity.

The Arabs, Islam

The Arabs are a people who originated in the Arabian peninsula in roughly the 9th century BCE. Arab is an ethnicity: children born to Arab parents are Arabs, regardless of their religion. There are, for example, many Coptic Egyptians who are both Arab and Christians. Islam is a religion that originated among Arabs; practitioners of Islam are referred to as Muslims. The Arab leader and prophet Muhammad (PBUH), led an Arab army that conquered much of the Middle East and North Africa to spread Islam and impose Islamic rule. Thereafter, a series of Islamic Caliphates ruled the region for centuries.

Through the Islamic crusades, Arabs spread through much of the Middle East and North Africa. In 2024, there are 22 member nations of the Arab League with roughly 456 million citizens. Nearly 25% of the world’s population is now Muslim. Muslims are the majority religion in 46 countries and in at least 23, Islam is the official state religion.

Palestine and the Palestinians

Palestine refers to a region of the Levant with ill-defined borders (like “the Sahara or the Mid-West”). It has not historically referred to a nation (there has never been a nation named Palestine) but today the Arabs of Palestine aspire to a new nation state named Palestine. The origin of the term is debated, but is likely a Greco-Roman reference related to the ancient Phoenicians who lived in the region. Modern usage is clearer and stems from the Roman era: rebellious Jews were crushed by the Romans who then renamed Israel, Judea, and Samaria as the Roman administrative province of Syria Palestina, which later became just “Palestine”.

Palestine suffered many invasions and conquests. Peoples from all over the Middle East and Europe moved to and through Palestine. Following the 7th century conquest by Arabs and the subsequent Caliphates, many residents converted to Islam and the region generally underwent Arabization. During the periods from 1500-1900, regional famines and conflicts also sparked mass migrations that brought many ethnic Arab immigrants to Palestine.

Exactly who the Palestinian people are today is a hotly contested issue due to its bearing on the conflict. If the population that identifies as Arab is primarily descended from foreign invaders, it weakens that population’s claim to being indigenous. However, if the population is descended from the ancient populations of the region (Canaanites, Phonenicians, Israelites, and Samaritans), it strengthens the case for being indigenous but also strengthens the case for the Jews being indigenous.

Until at least the end of the 19th century century, the term “Palestinian” referred to anyone who lived in Palestine (Jews, Arabs, Christians, Muslims, etc.). The term Palestinian was first used to self-describe Palestinian Arabs in 1898 during the rise of Arab nationalism. However as the population of Palestine was largely Arab at that time, the exclusive usage to denote only Palestinian Arabs remained unclear. The Palestine Liberation Organization (PLO) was an Arab nationalist movement that formed in 1968 after the 6-day war (see below). The PLO defined Palestinian as “those Arab nationals who, until 1947, normally resided in Palestine regardless of whether they were evicted from it or stayed there. Anyone born, after that date, of a Palestinian father—whether in Palestine or outside it—is also a Palestinian. The Jews who had normally resided in Palestine until the beginning of the Zionist invasion will be considered Palestinians.”

Widespread use of the term “Palestinian” to refer exclusively to Palestinian Arabs is thought to have its roots in Soviet cold war propaganda. At the start of the cold war, the Soviet Union sought to build relationships in the Middle East. When Israel aligned with the US and the West, the Soviet’s launched an extensive anti-Israel propaganda campaign in the late 1960s. Many current criticisms of Israel spring from that campaign.

Genetics: The earliest recorded people of the Levant were the Canaanites. Most recent genetic studies show that both Jews and Palestinian Arabs share a great deal of common Canaanite ancestry and that Jews and Palestinian Arabs are more closely related to each other genetically than to other groups (see this 2000 study published in Human Genetics). This suggests that both groups have legitimate claims to being indigenous to the region despite both groups also having significant genetic admixture.

Origins of the Modern Conflict

Due to millennia of persecution by both Christians and Muslims, Jews had emigrated to and sought refuge in countries throughout Europe and the Middle East. In 1850, more than 27% of the population of Baghdad was Jewish (0% today). In 1931, 10% of Poland’s population was Jewish (0.01% today). For comparison, today, Jews comprise 16% of the New York City population and 2.4% of the US population.

Jews experienced regular pogroms (massacres and ethnic cleansing) and increasingly severe persecution throughout the 19th century. As Jews tried to flee, most countries, including the United States, closed their borders to Jewish refugees. An Austro-Hungarian Jew, Theodor Herzl, founded a Jewish nationalist movement called Zionism to rebuild the Jewish homeland in Israel and provide Jews with a safe place of refuge. Zion literally refers to a hill in Jerusalem but throughout Jewish history has symbolized Israel itself. The combination of severe persecution and no place to take refuge made Zionism critical to diaspora Jews.

During the 19th century, Palestine was under Ottoman Turkish rule and sparsely populated with roughly 300K residents, 85% of who were Muslim. European Jews started to purchase land in Palestine from Turkish and Arab land owners. As global persecution increased, many Jews started to move to Palestine in what diaspora Jews refer to as Aliyah. The influx of immigrants often resulted in friction between Jewish and Arab communities.

An Arab nationalist movement also began in the late 19th century, seeking to overthrow European colonial rulers. Both Jews and Arabs sought independence and autonomy and where these two nationalist movements overlapped (in Palestine), is the origin of the Arab-Israeli conflict.

World War I and the Balfour Declaration

Toward the end of World War I, in 1917, British Jews lobbied for a Jewish homeland and the British government announced their support for “a national home for the Jewish People” in Palestine in the Balfour Declaration. The specifics, including borders and whether that national home would be a state were vague. The declaration included calls to safeguard the civil and religious rights of the people living in Palestine, however the declaration itself was made without involvement of those people which infuriated Arab nationalists.

When World War I ended, the Ottoman empire had been defeated and was divided among the European powers. Nearly the entire Middle East was under European rule. A large area called Trans-Jordan fell under British rule and included British Mandatory Palestine.

Important Context: The period between World War I and World War II marked the beginning of the end of European colonialism throughout much of the Middle East. The European colonial powers and the League of Nations worked to define new independent nation states, often along ethnic lines. However, European interests were always kept in mind and national boundaries were often drawn to give power to favored groups or rulers. For example, the land on which the 35 million Kurdish people have always lived was carved up into 4 nation states (none Kurdish).

The issues of identity and perception are central to understanding the conflict: Arabs viewed diaspora Jews as Russian or Polish: European colonialists. Russians and Poles viewed Jews as an entirely different race, often killing or expelling them. Jews viewed themselves as an indigenous people returning to and reclaiming their homeland.

Peel Commission

With increasing Jewish immigration, conflict between Arabs and Jews increased. Having access to modern European agricultural techniques and education, Jewish immigrants dramatically improved the land they had purchased, converting sand dunes and swamps into orange groves. The Arab population grew quickly, but so did the economic disparities. As conflict and nationalism grew, both groups fought with each other and with the British, and the British sought a solution.

In 1936, the British Lord Peel was appointed to investigate and resolve the conflict in Mandatory Palestine. Peel recommended partition of the land into two separate states: one for the Arabs and one for the Jews and that a fusion was not possible. This proposal was unanimously rejected by the Arabs who opposed any Jewish state. The Zionists accepted the concept of partition but debated the specifics. At the Bloudan Conference in 1937, the entire Arab world rejected partition or any Jewish state and claimed the entire region as Arab.

Important Context: Arab rejection of any Jewish state has been central to the intractability of the conflict. For cultural, demographic, and religious reasons, Arabs sought absolute dominion over the entire region. Jews, having experienced severe persecution under Arab and European rule, will not accept a solution that does not provide autonomy and self-determination for Jews.

World War II and the Holocaust

World War II broke out in 1939 and the German Nazis launched the worst genocide in history, murdering 6 million Jews, nearly 2/3 of the entire European Jewish population. Jews who tried to flee found no sanctuary; all countries closed their borders to them, including the United States. Jews were rounded up into concentration camps and killed en-masse. The genocide is known today as the Holocaust.

Most Arabs aligned with the Nazis who were fighting the other European colonial powers that had occupied the Middle East. The Grand Mufti of Jerusalem, Muhammad Amin al-Husayni, was the Arab leader in Palestine and was famously antisemitic. He allied with the Nazis and supported the Jewish genocide. He also imported many Nazi ideas about Jews and European antisemitism to the region – ideas that had not been prevalent in the Islamic world previously. This greatly exacerbated antisemitism in the Arab world.

At end of the war, Europe had millions of displaced persons (DPs). Most returned to their countries of origin…except the Jews. The countries where they had previously lived would not accept Jews back and often killed them if they returned. So nearly a million Jews remained as DPs in the former concentration camps until modern Israel was founded.

Modern Israel

To address the hundreds of thousands of displaced Jews languishing in the “liberated” concentration camps, and to resolve the conflict between Arabs and Jews in Palestine, in 1947, the newly formed United Nations proposed the United Nations Partition Plan for Palestine. This plan (Resolution 181) called for the creation of separate Arab and Jewish states in British Mandatory Palestine with Jerusalem falling under international rule. Jewish organizations accepted the plan; the Arab League saw the partition as unfair and viewed any Jewish state as unacceptable, and rejected the proposed partition.

In 1948, the Jews declared independence in the portion of Palestine allocated to them in the UN partition plan and the next day, the surrounding Arab nations attacked with the intent of claiming all of Palestine for Arab rule. This was the first of three major Arab-Israeli wars.

1948 Arab-Israeli War

Israel declared independence on May 14, 1948. Much of the local Arab population and the surrounding Arab states of Egypt, Trans-Jordan, and Syria attacked the next day. After a 9 month war, the Jews had survived and modern Israel was established. Jordan conquered and annexed the part of Palestine west of the Jordan River (what we now refer to as the West Bank); Egypt conquered and occupied the part of Palestine we now refer to as the Gaza strip. Jordan held East Jerusalem and Israel held West Jerusalem.

Mass Displacements

The 1948 war resulted in the displacement of roughly 700K Palestinian Arabs who fled or were expelled from their homes in the area that became Israel. Palestinian Arabs refer to this, and to the formation of Israel generally, as the Nakba (meaning “catastrophe”). The Arabs who fled or were driven out had their property confiscated. Many of their descendants remain stateless and in refugee camps today. The Arabs who had remained in the newly formed Israeli state retained their property and were granted full citizenship. Today, more than 21% of Israel’s citizens are Arabs. Israeli Arabs have full citizenship and equal rights with Israeli Jews.

All Jews were ethnically cleansed from the areas conquered by the Arab states. Jordan expelled or killed all Jews from East Jerusalem, confiscated the land they had purchased during the Ottoman empire, and bulldozed ancient Jewish holy sites. Jordan refused access to Jerusalem to all Jews.

Moreover, roughly 900K Jews were then expelled from the rest of the Muslim world. Nearly 100% of the Jewish residents of the middle east were ethnically cleansed and their property confiscated. Where Baghdad had been 27% Jewish, only 26 Jews remain in all of Iraq today.

Important context: The conflict between the Arab and Jewish peoples has always been larger than Palestine. When Israel was formed, Jews were not just expelled from those areas of Palestine conquered by Jordan and Egypt, they were expelled from the entire Arab/Muslim. Jews who had no relation to Palestine and had lived in other parts of the Middle East for centuries. This is important because it explains why Jews will not accept a solution to the conflict that denies them a Jewish state.

Israel – a country of refugees

The majority of Israeli Jews today are people who have always lived in the Middle East (known as Mizrahi Jews) or their descendants and were made refugees by the mass displacements mentioned above. Another large group of Israeli Jews were the hundreds of thousands of displaced persons (DPs) who arrived as refugees from Europe. After World War II, millions who had been displaced languished in DP camps. Jews were among the last who could not be repatriated because so few countries would accept them (including the United States). Israel was the only country that would take the Jewish DPs.

Important context: Israel is a country of refugees. Arab nationalists have tried to apply the strategies used to drive European colonial settlers to return to their countries of origin from places like Algeria. That strategy has not worked with Israeli Jews because they are refugees, not colonists; they have no country to return to. Israeli prime minister, Golda Meir, famously quipped: “We Jews have a secret weapon in our struggle with the Arabs; we have no place to go.”

Palestinian Arab refugees

While Jewish refugees were absorbed into Israel in the years following its formation, the surrounding Arab states did not accept the displaced Palestinian Arabs as citizens and kept them in refugee camps along the Israeli border, believing that they would soon conquer Israel and return the refugees to their homes. This created the Palestinian refugee problem that persists to this day.

Important context: Arab League nations are dictatorships, monarchies, and theocracies. Ethnic nationalism is an effective tool for distracting populations from economic and political problems. Palestinian Arab refugees have been incredibly useful in this regard and this is part of the reason so many remain stateless and have not been offered citizenship in surrounding Arab countries that share language, cultural, religious, and ethnic ties.

UNRWA

Refugees from all global conflicts except in Palestine are managed by UNHCR whose mission is to help displaced people find new homes and citizenship (at which point they are no longer refugees). However, In 1949, the UN formed a new agency exclusively to serve Palestinian Arab refugees: the United Nations Relief and Works Agency (UNRWA).

Unlike UNHCR, UNRWA does not seek to resettle refugees and counts as refugees people who have moved to other countries and become citizens there (something done in no other conflict) – and their descendants! As a result, UNRWA now provides assistance to 1.5 million Palestinian Arabs and has registered 5.6 million as refugees.

UNRWA is frequently criticized by Israel and the United States for being beholden to terrorist organizations such as Hamas and Islamic Jihad.

Important context: UNRWA is viewed as controversial because its structure and mission effectively perpetuate the conflict. Under UNRWA, the 700K initial refugees have grown to 5.6 million. UNRWA has 30K staff members (almost all Palestinian) while UNHCR, which serves the entire rest of the world, has a staff of 18.9K.

1964 Palestinian Liberation Organization (PLO) and Terrorism

In 1964, at a meeting of the Arab League, a coalition entity called the Palestine Liberation Organization (PLO) was formed and was closely associated with the Pan-Arabist movement. Among the goals stated in the PLO charter were the complete destruction of Israel. Note that the PLO was formed 3 years before the 1967 war – a time when the West Bank was controlled by Jordan and the Gaza Strip was controlled by Egypt. The goal of the PLO was to destroy Israel entirely.

Following the 1967 war (see below), Yasser Arafat became chairman of the PLO. The PLO was initially based in Jordan where it waged guerilla war with Israel, but after trying to overthrow the Jordanian monarchy, the PLO was expelled and went to Lebanon. After sowing discord in Lebanon leading to civil war, and eventually drawing Lebanon into a catastrophic war with Israel, the PLO was also expelled from Lebanon and scattered to various sympathetic Arab countries.

During the 1970s, the PLO shifted from a strategy of guerilla warfare against Israel to international terrorism and a focus on civilian targets. Palestinians hijacked airliners, cruise ships, restaurants, airports, and the Olympics.

Important context: One of the PLO’s terrorist acts was the hijacking of a French civilian airliner, taking hundreds hostage. The hijackers flew the plane to Uganda where they received support from dictator Idi Amin. After releasing all non-Jewish hostages, the hijackers threatened to kill the remaining 102 Jewish passengers. Israel launched a daring midnight raid on the Entebbe airport with 100 commandos, freeing all but 3 of the hostages and killing the hijackers and dozens of Ugandan troops. Only one commando was killed: Yonatan Netanyahu – the older brother of Israeli prime minister Benjamin Netanyahu. Also important: the PLO terrorism was not constrained to Israelis; terrorist would separate anyone who had a “Jewish sounding” name and viewed all Jews globally as targets.

1967 Arab-Israeli War (aka six-day war)

In 1967, Arab states (mainly Egypt) massed their armies on the Israeli border and Egypt closed shipping lanes to Israeli vessels. Egypt ordered withdrawal of UN peacekeeping forces (who interestingly left without comment). Rather than wait for the invasion, Israel launched a series of preemptive airstrikes and destroyed the air forces of the attacking countries (Egypt, Iraq, Syria, Jordan). This left Israel with air supremacy; they then launched a series of quick ground offensives which routed the Arab forces. The Egyptian forces were defeated and Egypt lost the Gaza strip and the entire Sinai peninsula. Jordan lost the West Bank, including West Jerusalem, and the Syrians lost the Golan Heights.

Critically, by the end of the war, nearly 1 million Arabs now lived in territory occupied by Israel but not annexed by Israel: the West Bank and the Gaza Strip. This greatly exacerbated the refugee crisis.

1970 Black September (PLO in Jordan)

Palestinian guerilla forces (the PLO and related factions) began operating out of Jordan in the aftermath of the 1967 war. Jordan had been formed from the majority of the British post WWI territory and had a majority Palestinian population. Jordan’s King Hussein allowed the PLO to launch attacks against Israel and engage in international terrorism such as the 1972 Olymbic Munich Massacre and numerous hijackings of international airliners. As the PLO became more powerful, they sought to seize power in September 1970 and a bloody civil war ensued. Eventually, Jordanian forces routed the PLO who fled to Lebanon (where they later became pivotal in the Lebanese civil war).

1973 Arab-Israeli War (aka Yom Kippur war)

In 1973, a coalition of Arab states launched a surprise attack against Israel on Yom Kippur (the holiest day in the Jewish calendar). Although initially caught off guard, Israeli forces prevailed, pushing the Syrian army back to Damascus and coming within 100km of Cairo. The war was particularly dangerous globally because by this time, the United States was firmly allied with Israel and the Soviet Union with the Arab states. This was a the height of the cold war and the risk of escalation between the super powers was serious.

Israel and Egypt later negotiated a peace treaty wherein Israel returned the Sinai peninsula and Egypt recognized Israel and eventually moved out of the Soviet sphere of influence into the American sphere.

1975 Lebanon Civil War (PLO in Lebanon)

Lebanon was already in trouble when the PLO arrived from Jordan, but their arrival helped trigger the start of a decade of civil war that effectively destroyed the country. The PLO presence in Lebanon lasted until 1982 when Israel finally drove them out, but in the interim, they gained near full control of southern Lebanon and continued to launch attacks on Israel and engage in international terrorism. They were a major player in the brutal multi-party Lebanese civil war that left the country in ruins.

1978 Camp David Accords

One of the first moves towards peace between the Arabs and the Jews took place in 1978. US president Jimmy Carter hosted Egyptian president Anwar al-Sadat and Israeli prime minister Menachem Begin for secret negotiations at Camp David in Maryland, resulting in the Camp David Accords. In exchange for peace and recognition, Israel returned the Sinai peninsula to Egypt. Israel and Egypt agreed to a framework for peace for the Palestinians (but the Palestinians did not participate in the negotiation).

Sadat and Begin received the 1978 Nobel peace prize. Egypt and Israel normalized relations in 1980, ending their state of war. Israel dismantled Israeli settlements from the Sinai and removed all settlers. Egypt was suspended from the Arab League for ten years. Sadat was assassinated in 1981 by members of the Islamic Jihad.

1982 Lebanon War

Following their exile from Jordan, the PLO set up base in southern Lebanon from which it regularly attacked northern Israel. Lebanon had been in the throes of a sectarian civil war since at least 1975, with Israel allied with the Druze/Maronite Christians and Syria backing the PLO forces. An attempt to assassinate an Israeli ambassador was the incident that prompted Israel to invade southern Lebanon to dislodge the PLO. The Israeli army defeated the Syrian and PLO forces who were surrounded. American intervention negotiated an evacuation of the PLO from Lebanon to Tripoli. The PLO military wing was permanently diminished. The Syrian proxy was replaced with a pro-Israeli Christian government, but the president was soon assassinated and the civil war in Lebanon continued. The devastation from the war with Israel left Lebanon more cautious about future war with Israel.

Important Context: The devastating civil war in Lebanon had little to do with Israel and is indicative of the larger geopolitical context in which Middle East conflict occurs. The battles in Lebanon were sectarian, pitting Christians, Sunni Muslims, an Shia Muslims against each other. These battles were often fought by militias that were proxies for Syria, Iran, Iraq, and others. Lebanon ultimately ended up under Syrian/Iranian control. Today, the Iranian-proxy militia Hezbollah controls much of Lebanon.

1987 Intifada

Israel had occupied the West Bank and Gaza strip since 1967, but had not annexed them, instead starting a prolonged period of military occupation. The occupation left a generation of Arab residents stateless and in political limbo. Moreover, when Jordan had captured the West Bank in 1948, all Jews had been killed or expelled and their property seized. Certain denominations of religious Jews believed that Israel should return to and annex the West Bank, which had been part of ancient Israel (the kingdoms of Judea and Samaria). They began building new Jewish villages there. These became known as “settlers” and have become a flashpoint for conflict ever since.

Frustrated by living under the brutality of military occupation, with the PLO greatly diminished since being exiled from Jordan and Lebanon, and with Jews moving back into the West Bank the first Intifada started. This intifada was characterized by civil disobedience, property damage, and periodic violence using mainly stones and molotov cocktails (petrol bombs). Israeli forces responded with a heavy-handed crackdown that fed Arab resentment and further inflamed tensions.

In the aftermath of the first Intifada, the PLO pivoted toward considering a two-state solution, but competing groups such as Hamas sprung up dedicated to the destruction of Israel and genocide of all Jews.

1987 Hamas

Hamas emerged in 1987 as a competitor to the PLO. A branch of the 1928 Egyptian Muslim Brotherhood, and active in the Gaza strip since the 1950s, their 1988 Charter called for the destruction of Israel, killing of all Jews, and establishment of a fundamentalist Islamic state in all of Palestine. Where the PLO was nationalistic, Hamas is a fundamentalist religious organization whose charter explicitly calls for genocidal violence by divine decree. Hamas is a designated foreign terrorist organization by the US government (and most other governments).

Important Context: Hamas is ideologically committed to destroying Israel and killing Jews. Although some efforts were made to soften those positions in 2017, they are widely regarded as propaganda; the 1988 Charter was never changed or rescinded. Hamas does not want peace with Israel or a two-state solution. Hamas’ belief in the divine nature of their mission has allowed them to engage in the most brutal forms of violence without remorse.

Important Context: Muslim Brotherhood is a larger organization with a mission of global Jihad. MB has played a critical role in uprisings in Egypt and today is backed primarily by Qatar and Turkey. The conflict in Israel/Palestine is part of much larger regional power struggles.

1993 Oslo Accords

Although the first Intifada failed, it changed the status quo for Israelis and Arabs. As Israel had grown in military and economic strength, it had gradually become apparent that Israel could not be defeated militarily by the PLO or surrounding Arab states. Normalization with Egypt had proven resilient and Jordan was done with the PLO after Black September. Israel, for the first time, seemed to be in a position where it no longer faced immediate existential threat.

However the Intifada demonstrated to Israelis that even overwhelming military strength could not guarantee Israeli security against domestic uprisings. Moreover, many in Israel felt the decades-long occupation was unjust and could not continue indefinitely.

Following a conference in 1991, Israeli PM Rabin and PLO head Arafat met with US President Clinton and signed the Olso I Accord wherein the PLO renounced violence and their goal of destroying Israel and Israel committed to a path for Palestinian autonomy and withdrawal from the Gaza Strip and parts of the West Bank over the next 5 years. The PLO recognized Israel and Israel recognized the PLO as the representative of the Palestinian people. Numerous issues remained unresolved and their “final status” was to be negotiated over the 5 year period. Rabin, Perez, and Arafat received Nobel peace prizes in 1994. Additional agreements were signed in 1995: the Oslo II Accord that set out the basis for further negotiations.

1994 Palestinian Authority

As part of the Oslo Accords, Israel withdrew its forces from parts of the West Bank and a new Palestinian government was established: the Palestinian National Authority or just Palestinian Authority or PA. This became the de-facto government of the Palestinians in parts of the West Bank and all of the Gaza strip.

Israeli settlement activity had been ongoing since 1967 and there were now large Israeli towns (aka settlements) in the West Bank. For this reason, Oslo divided the West Bank into 3 regions: A=Palestinian urban areas, B=Palestinian rural areas, C=Israeli settlements. The PA had full civilian and military control over area A and full civilian control over area B. Israel had full civilian and military control over area C and military control over area B. In 1993 there were roughly 111K Israelis living in area C.

The PA was domestic; the PLO continued to represent Palestinians internationally including at the UN.

2000 Camp David Summit and the Second Intifada

In July of 2000, president Bill Clinton facilitated peace negotiations between Israeli prime minister Ehud Barak and PA chairman Yasser Arafat. This meeting, known as the 2000 Camp David Summit, lasted two weeks and was comprised of largely oral proposals between the two parties. Talks reached an impasse at many issues, but one of the primary challenges was that Israelis refused the “Right of Return” (more below) and Arafat refused to compromise without this, rejecting the Israeli offer to establish a demilitarized Palestinian state with 100% of Gaza and ~90% of the West Bank. Another major issue was that corruption and violence within the PA was pervasive, and a belief among many Israelis that the PLO was not sincere in its recognition of Israel and would merely use any new state as a launching pad for terrorism and war. Trust was low and faltered. The summit concluded without an agreement, which ignited a 5-years long Palestinian revolt, known as the Second Intifada, involving riots, lynchings, rocket launches, and suicide bombings.

The final status issues of the summit were thorny, with central challenges including:

• “Right of Return”
  Palestinian Arabs demand for a “right of return” for Arabs displaced by the 1948 war *and their descendants*: a right to return to their ancestral homes in Israel and the West Bank. This too is something Israelis will almost certainly never accept for two reasons: 1) High Palestinian birth rates have resulted in a soaring population of descendants who could potentially become the majority in Israel if allowed to return freely. Israel would be faced with the prospect of Israeli no longer being Jewish or no longer being a democracy; both unacceptable to Israeli Jews. Moreover, many Israelis view the “right of return” as fundamentally unfair since in 1948, similar numbers of Jews were ethnically cleansed by Arab states and neither they nor their descendants will ever regain their homes and property.
• Final status of Jerusalem
  Jerusalem is the the capitol and the spiritual home of the Jews. For thousands of years, Jews have ended prayers with “Next year in Jerusalem”. Jerusalem is where the holiest Jewish sites are including the Temple of Solomon which was destroyed, rebuilt, destroyed again, and then Arabs built a mosque on top of the site (the Dome of the Rock) which is now the third holiest site in Islam. When Jordan captured East Jerusalem, they expelled all Jews and confiscated their property. Jewish holy sites were desecrated and Jews lost all access to them. Palestinians now seek East Jerusalem (or alternatively all of Jerusalem) as the capitol of their new state. This is something Jews will almost certainly never accept.
• Settlers
  The settler movement had continued and was making it increasingly difficult for a final Palestinian state to be contiguous rather than a patchwork of disconnected areas. By 2000, there were nearly 200K Israeli settlers living in the West Bank; Barak proposed to reabsorb these settlers by moving them to the portion of the West Bank which Israel sought to permanently annex.

Terminology and Symbols: The suicide bombings and other violent attacks seen in the Second Intifada were typically aimed at Israeli civilians, claiming hundreds of lives across dozens of terrorist attacks. Consequently, Israelis and the Jewish diaspora associate the term “intifada” with indiscriminate violence against civilians and the Jewish people. Another symbol to arise from this violence was that of bloodstained hands, as seen in the infamous photo of the 2000 Ramallah lynching.

2001 Taba Summit

The second intifada led to unrest among Israeli Arabs, resulting in protests that devolved into violent clashes with the police. Barak came under political fire for this turmoil and resigned in late December 2000. Barak and Arafat continued peace talks for a week at the Taba Summit in late January of 2001; these talks remain the closest to peace the two sides have come. The final status issues still largely revolved around the “Right of Return” and details of Israeli annexation of pieces of the West Bank. Both sides agreed to Jerusalem being an open city and having separate Arab and Jewish neighborhoods with Palestinian and Israeli sovereignty, respectively. Despite the productive nature of the talks, the talks tragically ended about a month prior to an agreement could be reached; Ariel Sharon was elected prime minister with a 2:1 lead, and he did not resume negotiations after his election.

Important Context: although the Likud party did not resume peace negotiations after the Taba Summit, it is important to consider that such talks were occurring under the backdrop of the second intifada. Tension between the Israeli Jewish and Arab citizens and distrust between the PA and Israel remained high, which helped undermine efforts for peace and bolstered support for right-wing politics.

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2005 Gaza Withdrawal

2007 Hamas

2020 Abraham Accords

Prospects/Obstacles to Peace

Every lab needs at least one good variable bench power supply. There are so many important features that few manufacturers get all of them right. I have quite a few bench supplies, but the best moderately priced supply I own is the GPP-3323 from GW Instek.

The key features for me are:

• Dual variable outputs 0-32V, 3A max each
• Third limited output meant for digital logic: 1.8/2.5/3.3/5.0V at up to 5A
• Very low-noise output (<= 350uV)
• Outputs can be paralleled for higher current or put in series for higher voltage
• Over-voltage/current/power/temperature protection
• No overshoot on power on/off or load transients
• Intuitive display/user interface
• Keypad for numeric entry of all values
• Individual output enables and also all-output control
• Minimal fan noise
• Programmable via USB and LAN interfaces
• Can generate configurable output waveforms

However, what really distinguishes this power supply from others is that one of the power supplies can be used as an electronic load (up to 50W). This makes this supply unusually useful for developing DC-DC converters and generally characterizing power supplies.

I bought it from TEquipment which I highly recommend as a vendor.

• Product Page
• Specifications
• User Manual
• Supports TestController software (see forum and here)
• Firmware mod
• A review

My oldest laptop is a Lenovo Thinkpad Carbon X1 (6th-gen Type 20KH). I still use this because it is solid, light, significantly smaller than my standard laptop (LG Gram 16), and I have a couple of handy docks for it. I use the Gram if I’m going to be doing significant writing/development because I need the larger screen, but the 14″ X1 is perfect for non-work travel when I only need light/occasional internet access. So I plan to keep it in service for a while.

Because Windows 10 will be end-of-life next year (October 2025), I wanted to upgrade the X1 to Windows 11. The good news is that it supports Win11 (and is now running it). The bad news is that the instructions for upgrade on the Lenovo website are atrocious. If you follow them, in many cases, your laptop will be rendered temporarily un-bootable.

The underlying problem is that the hard drive on many X1s is formatted using the old MBR (master boot record) partition style which is what’s used by the legacy BIOS mode. Windows 11 security requires secure boot UEFI instead of legacy BIOS. UEFI in turn requires booting from a hard drive formatted with GPT rather than MBR. As long as your X1 is set to boot in legacy BIOS mode from a drive with MBR partition table, Windows Update will indicate that your X1 is not able to run Win11. Microsoft’s PC Health Check program (download here) will tell you why.

The good news is that Microsoft provides tools for converting your MBR formatted drive to GPT in place. The bad news is that the process is tricky and the instructions are scattered across the internet…hopefully this post helps. (Note: even though the conversion preserves all data, back everything up before you start this process just in case). You will want to do the following:

1. If you haven’t already created one (and most folks won’t have), you need to create a local password for your user account on your X1. This password is different from the Microsoft online account you are probably using with Windows 10. The local password will be required in the next step. Unfortunately, I didn’t note exactly how I did this, but some instructions that may be useful are here.
2. Check your hard drive to see whether it uses the MBR partition table and, if so, whether it can be converted to GPT (and then convert it). The instructions for this are here. Note that this will require you to boot to a command prompt in a special mode which will require the local password you created in step 1.
3. If the conversion goes well, you can now reboot your X1, enter the BIOS setup and enable Secure Boot under the Security tab. This will likely enable some other things in your settings like the Trusted Platform Module (TPM) which are required by Windows 11 secure boot.
4. If that has gone well, you should be able to boot into Windows 10 again and PC Health Check should indicate that your X1 is suitable for Windows 11. Unfortunately, the Windows Update screen in Settings will still say your X1 doesn’t support Windows 11 so you can’t use the automatic updates to upgrade to Win11.
5. So the last step is to download the Windows 11 Installation Assistant here. When you run the assistant, it should take care of updating your X1 from Win10 to Win11.

My X1 is now running Windows 11 so I can confirm that this works.

A lot of useful information was found on the Lenovo Community Forum here.

We took our first vacation since the pandemic this month (January 2024) and traveled to Sri Lanka. It was a wonderful trip. After roughly 24 hours of total travel, with a stop in Istanbul, we started in Colombo (the capital).

The impetus for our trip was the wedding. of Sanjiv and Sumudu (Deana’s cousin Janthy and her husband Dehan’s son and new daughter-in-law). The wedding was held on the beach behind The Galle Face Hotel. and the setting was incredibly picturesque. It was my first Buddhist wedding and it was filled with symbolism, and ceremony including Kandyan traditional dancers.

We stayed at the Galle Face which is a venerable and impressive 5-star colonial-era hotel. It has been kept up-to-date; the rooms, hotels, restaurants are modern and classy, but it still conveys the history and gravitas of a hotel that’s been in service since the mid-1800s.

Sri Lanka sits on the equator and can be pretty hot. Although we visited in January, the temperature in Colombo stays in the mid-80s and humid year round. One of the many bizarre legacies of British colonialism is that men in Sri Lanka generally wear western suits. Nothing is more miserable in hot weather than a wool suit, high collar, and tie. Linen is a bit better, but still awful. What makes this even more mysterious is that South Asia has extraordinarily beautiful fashion that is meant for the climate. Deana and I visited an Indian store in Ellicott City (India in Style); they have a huge selection, the owner is wonderful and patient, and for better (Deana’s case) or worse (mine), we bought South Asian formal outfits for the wedding. A Kurta is definitely cooler and more comfortable than a suit although in retrospect I would have preferred linen over silk.

Colombo is a large metropolis with heavy traffic, skyscrapers, and diverse neighborhoods. Like many major metropolises, it is also very fashionable and Deana and I quickly realized our American-tourist clothing needed an upgrade. After several visits to House of Fashion (a popular department store that focuses on clothing) we acquired enough warm-weather, but semi-fashionable clothing (and another suitcase to hold it).

We also realized how essential our driver (Amal) was. Driving in Colombo makes driving in New York City look trivial. Aside from the fact that Sri Lankans drive on the left (UK-style), driving anywhere in Sri Lanka is not for the faint of heart whether in dense urban settings or narrow mountain switchbacks. Even in rural areas, overtaking (passing) is an art-form and there are novel road hazards (like elephants) one may not be accustomed to. If you go to Sri Lanka, get a private driver; it is the single best thing you can do. If you can get Amal, you should do so; he is a gem. You can reach him on WhatsApp (the calling app everyone in Sri Lanka uses) or on his website. I’ll talk more about this later in this post.

While in Colombo, we spent time with Deana’s family members including her cousins Lakshman (who lives in Australia), Lakshme (who lives near us), and Dev (who lives in the UK), her mother’s brother: Uncle Rasa and his wife Jaya, her relatives Somes (Colombo), Subo (UK), and Subo’s brother Ram and his wife Kala (Toronto). Lakshman entertained at his condo where I made my one and only mistake of having a drink with ice – Mr. Montezuma made me pay for that drink for about a week. Really really really don’t drink tap water or use ice in Sri Lanka. Anything you drink must come from a sealed bottle or be boiled. Dev took us to the charming Barefoot Cafe (where by coincidence we again saw Lakshme and Lakshman)

From Colombo, we traveled to Nuwara Eliya which is in the mountainous central region of Sri Lanka. There we stayed at another venerable colonial era 5-star hotel: The Grand (which, true to its name, is spectacular). The rooms are amazing, the grounds are beautiful, and the scenery is stunning. Nuwara Eliya is in tea country: the mountainous central part of Sri Lanka. Unlike Colombo (and much of the island where the climate is tropical), the mountains are delightfully cool and dry – a near perfect environment. The area around The Grand is known as “Little England” and is full of European-style architecture and the culture of the area is unique. We had high tea daily, visited a tea plantation and factory,

By coincidence, Subo was staying at The Grand at the same time and Deana was able to spend some time with her there. Did I mention how spectacular the gardens are?

From Nuwara Eliya, we traveled to Kandy, Sri Lanka’s second city and religious center. At Kandy we visited the Temple of the Tooth (the holiest Buddhist temple) and went to a cultural show with traditional dances including an impressive display of fire dancing and eating. Kandy is spectacularly scenic. We stayed at the Amaya Hills (another 5-star hotel) which sported stunning rooms and incredible views. Coincidentally, Deana’s relative Subo and her husband Ram and his wife Kala whom we had been with at the wedding were also staying at The Grand at the same time so we got to meet with them there again.

While staying in Kandy, we visited two ancient Buddhist temples; one was a UNESCO World Heritage sites: the 1st century BCE Dambulla Cave Temple. Both temples involve some climbing; Dambulla is built atop a 500′ rock so there are a lot of steps involved….but they’re worth it and somehow not nearly as difficult as the climb at Sigiriya (later). There are 5 caves at the top, each filled with massive ancient statues and every inch is intricately painted. Of the historic and religious sites we visited, I found Dambulla by far the most impressive. Note: there are a *lot* of monkeys at Dambulla.

From Kandy, we traveled to Sigiriya. On the way we visited the Sri Muthumariamman Hindu Temple in Matale. This is a very old temple which is incredibly intricate

Once we reached the Sigiriya area, we stayed first at The Heritance Kandalama, an unbelievable eco-hotel located in the midst of a nature preserve. It’s really hard to overstate how amazing the Kandalama hotel is. We started in Colombo at a very impressive 5-star hotel and somehow each hotel kept getting better; the Kandalama was hands-down the best. The hotel was designed by a famous Sri Lankan architect (Geoffrey Bawa) and is simply perfect. It is integrated with its natural surroundings in ways reminiscent of Frank Lloyd Wright. From the moment you arrive at the hotel, it is apparent that it has been built to blend in with its surroundings. The hotel is on a lake deep in a nature preserve; wildlife is everywhere and you truly feel like you’re in the jungle. The first night, monkeys stole Deana’s coffee cup and when it rained, several families of monkeys camped out on our balcony. The night was filled with the sounds of birds, monkeys, elephants, etc.

While at Kandalama, we had a chance meeting with the former chairman of the board of the corporation that built the hotel (and a whole chain of similar hotels): Prema Cooray. We had tea with him and he spent quite a long time with us; he is retired, but sharp as a tack, charming, and regaled us with the stories of how the hotel was built, the obstacles it faced (financial, political,etc.and how they were overcome). While we were at Kandalama, we experienced our only rainy day (and it was a great place to experience it); we enjoyed the hotel and spent a good deal of time talking with a delightful young artist from Bahrain (Abdulla Buhijji).

Our plans changed a bit due to the rain, so from Kandalama, we traveled to a nearby hotel: the Cinnamon Lodge in Habarana. Cinnamon Lodge is another highly rated hotel, and if we hadn’t just come from such incredible hotels, would have been impressive. As it was, the lodge felt a bit dated and even though it was actually very pretty. We took a dip in the pool and chatted with two nice British pensioners and the food was quite good. The rooms were reasonably spacious, but were set up as bungalows some distance from the main hotel; like many more traditional Sri Lankan settings, the rooms were air conditioned, but the bathroom was open to the air and overall, it just couldn’t compete with Kandalama.

From Habarana, we visited Sigiriya, another UNESCO World Heritage Site. This too was spectacular: the site of an ancient palace built atop a massive rock surrounded by water gardens. The gardens around Sigiriya are still being excavated, but they are both beautiful and amazing feats of ancient engineering. The earliest activity at Sigiriya was 3rd century BCE and the palace was built in the 4th century CE. As was recommended, I paid (a very small amount) for a guide who was knowledgeable and explained the detailed history of the site as we traveled through it. He was extraordinarily patient with me as I trudged up the 1200 steps (foolishly having gone around noon when it was pretty warm), having to stop several times. The guide does the climb several times a week and was a cardio-god, not even breaking a sweat. The climb is 590′ (59 stories) pretty much straight up…so it will give you a workout. It’s also not great for anyone with even a slight fear of heights. There are several important sites on the climb that did not permit photography including the famous maiden frescoes and mirror wall.

After Sigiriya, Amal arranged a safari through a nearby nature preserve the objective was to see elephants and it very much delivered.
It’s hard to convey just how beautiful the scenery is in Sri Lanka.

…and I will never again complain about deer in the road; this is what a road hazard looks like in Sri Lanka and it is not uncommon. I think the safari was one of the high points for Deana; we saw a ton of wildlife. Like so many things, the safari was arranged on very short notice by Amal. Having a private driver is like traveling with your own travel agency. Everywhere we went, Amal knew the hotels, sites, people, and could arrange whatever we wanted at a moment’s notice, usually for much less than we would have paid if we booked them ourselves.

From Habanara, we moved on to Anuradhapura, one of the 3 ancient capitals of Sri Lanka (along with Kandy and Polonaruwa). Unfortunately, we didn’t get to Polonaruwa due to rain and concerns that some roads might have been flooded.

In Anuradhapura, we stayed at very different lodging: the Arachchi Heritage. This is a private home with two separate, private guest suites and a staff that makes it effectively a boutique hotel. The house is spectacular, like something out of Architectural Digest. It is on a lake and its design, in many ways, reminded us of Kandalama: tightly integrated with nature. The positioning and design of the house capture a constant breeze so even though many parts of the house are open to the outdoors, they remain cool even on a hot day. The house won a Geoffrey Bawa design award. The owners: Chandrika and Siri were charming and wonderful hosts. The food was outstanding, every bit as good as the 5-star hotels and made to order!

While staying at Arachchi, Deana took a cooking lesson given by Chandrika and the in-house cook. The food was really delicious and I couldn’t believe how many dishes were prepared each meal for just two guests. The food at all of the hotels was just amazing; I had hoppers for breakfast every day, often along with pittu and idli. For lunch and diner I had Sri Lankan roti and all sorts of curries: dal, banana blossom, beet, snake gourd, and more.

We visited the extensive Anuradhapura archeological sites and museum. This was the site of an ancient capital and center of education and monastic knowledge. 5000 monks lived on 500 acres with extensive housing, baths, dining, sanitary systems, and remarkable feats of ancient engineering. Our guide (also arranged by Amal) was a young man named Jagat who was knowledgeable, extremely fluent in English, and very enthusiastic about Sri Lanka and its history. We had lunch with Jagat and Amal at the Aliya Resort Hotel in Sigiriya; their website doesn’t do them justice; it was incredibly beautiful and if we visit again we will try to stay there. In general, although Anuradhapura is worth seeing for its historical significance, I didn’t find it as impressive as sites like Sigiriya or Dambulla.

We returned to Colombo from Anuradhapura a day early because Deana had been making plans with relatives and family friends throughout the trip and we needed more time. We stayed at the Kingsbury hotel for the rest of our time in Sri Lanka. It was another 5-star modern hotel with impressive restaurants and facilities. My only complaint about the Colombo hotels is that they frequently host weddings and other events and the parties go on *late*; it wasn’t uncommon for the music outside to go on until 11:30pm or midnight. Sri Lankans like to party.

We visited with Aunt Amithi (Deanas mother’s closest friend); her husband had been an architect and her house was quite beautiful. I wish I’d taken more photos. Amithi herself was lovely and sharp as a tack.

We met Deana’s grade-school (St. Bridget’s Convent) friend Jaish for tea at the Tintagel, another impressive Colombo hotel. Jaish is now a fashion designer and was delightful.

We spent time with Deana’s cousins Janthy and Vilo and Janthy’s husband Dehan who took us to Nuga Gama; a restaurant in the middle of a swanky cosmopolitan hotel that had been created to give them feel of a rural village. At various times there were dancers and other entertainers such as this traditional comedic “devil-dancer”.

We visited Deana’s cousin Punya, her husband Dil, and their daughter Pulisticka (Puli) Jayathilake and her daughter RIddhi near her old house on Kinsey Road. It was neat that Riddhi represented the 5th generation from her family at St. Bridget’s Convent school in Colombo 7.

Deana’s father’s best friend’s son Dev Devendra and his wife took us to lunch at the beautiful Royal Colombo golf club. They are an awesome couple; their daughter lives in relatively nearby Reston, VA and Deana has already been in touch with her.

We had dinner with Deana’s cousin Prabha and her husband at the very nice Chinese restaurant in the Kingsbury hotel.

There’s a lot more to write, but I’m out of gas on this marathon post. It was an amazing trip and one I hope we’ll do again soon. The people were wonderful, the country is beautiful, and we had the benefit of traveling at a time when the exchange rate worked very much in our favor (1USD = 320 LKR). Tourism is a key business for Sri Lanka and it suffered badly during the pandemic. They really want tourism to return which makes for great synergy: tourism dollars and amazing value for tourists; so it is a *great* time to visit Sri Lanka; I highly recommend it!

The day after we returned home…

Fortunately, Maryland and climate change being what they are, it was 70F the following week…

To help with your next game of six-degrees of separation:

• Subo’s maiden name was Sobodhini Nagesan; she was Miss Sri Lanka 1977
• Dev Devendran knows Ranil Wickremesinghe and his family; we bumped into a nephew at the Royal Golf Club.

I used to like the Kindle platform and between Deana and I, we have purchased quite a few of them. Unfortunately, over the years, Amazon’s greed has ruined it and today, I’m done with the Kindle.

eBooks should be amazing. The zero-power persistence of eInk combined with cheap flash storage, wifi, and powerful microcontrollers should have made it possible to have an entire library in your pocket. The hardware is great, electronic distribution saves natural resources and, by nearly eliminating printing and distribution costs, eBooks should be able to lower book prices and give authors a higher share of sales.

The problem is that Amazon got greedy. Kindle editions now cost as much or even more than a real physical book, but much worse is that you can’t really buy a book for Kindle at all anymore, you can only rent it. I say you’re renting the book because you don’t own it in any meaningful sense: you can’t lend it or gift it to a friend when you’re done with it; amazon retains full control. Would you buy a car or a house that you couldn’t sell when you were done with it?

DRM – Digital Rights Management – is the technology that allows amazon to retain full control of a book that they’ve ostensibly sold to you.The solution might be to only buy books in the .epub format which does not include DRM (so you actually own what you’ve bought). You can read more about that here. Fundamentally, the issue is a legal concept called “first-sale doctrine“; you can read more about the eBook problem in this very good article.

Over time, Amazon has gradually raised prices and limited what you can do with a book you’ve “bought” until Kindle eBooks no longer make sense to me. It’s a great example of how monopolies hurt consumers: amazon owns more than 2/3 of the eBook market. Shame on amazon for ruining a good thing.

Getting Tomcat 8.5 to work with Netbeans 16 on Windows is maddeningly difficult in large part because the windows service installer for Tomcat doesn’t set the defaults that Netbeans needs.

If you’re on this page, it’s because you’ve been frustrated with it too. The magic formula to install tomcat correctly seems to be:
1. Set the server shutdown port to the default expected by Netbeans (8005) not the default (-1)
2. Add a Tomcat Administrator (e.g. user name=Tomcat password=Tomcat
3. Add manager-script to the Roles

Cyber security is a growing problem and the rapid growth of IoT is only making things worse. Many homes are now inundated with “connected” devices, many of which are vastly less secure than your typical home PC (which itself is fairly insecure). Connected devices usually have much smaller and less capable microprocessors, making it harder to implement robust security mechanisms. Their software also receives far less scrutiny than the software in popular operating systems and they typically receive software updates infrequently. With so many devices online these days, from thermostats to cameras to appliances to streaming sticks, it’s just a matter of time before those are hacked and if those devices are on the same network as your computers and document/photo storage, all of those are at increased risk.

One strategy to help lower risk is to create separate networks in your home for the devices containing sensitive data (taxes, family photos, documents, etc.) and for your internet-enabled devices. For example, you might have separate networks for:

• Home computers and storage
• Printers
• Guests
• Streaming devices (e.g. Amazon Fire Sticks and Fire ReCast or TiVos or …)
  that need to communicate with each other and the internet
• IoT devices (cameras, appliances, thermostats, etc.) that only need to communicate
  with the internet.

There are two main ways networks are formed these days: wired (Ethernet) and wireless (WiFi). Most modern WiFi access points let you create a separate isolated guest network that has its own ssid and where the firewall rules allow each host on the network only to access the internet; they can’t access each other or your home network. Providing separation and isolation for your wired network is a little more complex.

The easiest way to do separate your wired devices is to put them on separate networks connected by a router. You can create separate networks by physically wiring them separately, with each network only connected to the router, but that’s often inconvenient;
you may have a streaming device and a computer in the same room and you don’t want to run two wires. Another approach is to use intelligent Ethernet switches that support a feature called Virtual LANs (VLANs).

WIth VLANs, you create separate networks by assigning each network a number and then controlling which network(s) each port on your switch participates in (they can participate in more than one). Lots of companies make intelligent (aka managed) switches including Netgear and Ubiquiti. Netgear offers an inexpensive line of semi-intelligent GbE switches that support VLANs called ProSafe Plus. These can often be had on eBay for $20. Ubiquiti makes a more feature-rich line of switches, part of their UniFi series and their 5-port Flex Mini switch is a strikingly good value if you buy a 4-pack (around $29/switch…unheard of for a fully managed switch).

With NetGear switches, you *must* update the firmware to the latest version before using it; older firmware versions have serious security vulnerabilities. You configure the switch using its web interface. Under VLAN, select 802.1Q, then Advanced. Under VLAN Configuration, enter a unique VLAN ID for each network you want to create. VLAN 1 is the default network. Then under VLAN Membership, select which ports on the switch belong to which VLANs. Ports can be configured as Tagged or Untagged. Select Tagged (‘T’) for the ports that go from your switch back to the router (or another switch). Select Untagged (‘U’ for the ports that go to a computer/device/appliance. The Tagged port that goes back to your router should be a member of every VLAN. The Untagged ports that go to your devices should typically be members of only one VLAN. Finally, under Port VID, set the Tagged trunk port to use a PVID of 1 (main network) and then change each port that participates in a dedicated LAN to the number of its VLAN.

Consider an example: a 5-port switch (NetGear GS105eV2) is connected as follows:

1. Trunk port (uplink to the router) – Tagged, member of VLANs 1,2,3
2. PC you want on your main network – Untagged, Member of VLAN 1, PVID=1
3. Streaming device – Untagged, member of VLAN 2, PVID=2
4. DVR – Untagged, member of VLAN 2, PVID=2
5. IoT device 1 (e.g. IP Camera) – Untagged, member of VLAN 3, PVID=3

The streaming device and DVR are both on VLAN 2 so they can communicate with each other as well as accessing the internet through the router. The IoT device is on VLAN 3 so it can only access the internet through the router; it cannot access the Streaming devices or the PC. This is important because if the IoT device is hacked, the hacker has not gained access to your home network.

The switch connects to a router (possibly going through other switches). The router must be configured to do the following:

• Create a network for each VLAN. For example
  VLAN1=192.168.1.0/24
  VLAN2=192.168.2.0/24
  VLAN3=192.168.3.0/24
• A DHCP server should be configured for each VLAN
• If the router contains a switch, create a virtual interface for each VLAN on the switch
• Create firewall rules that determine how traffic can flow into, out of, and between each LAN (usually just into and between/local). For example, VLAN1 should not allow incoming traffic from the internet unless it is in response to traffic that originated on VLAN1. VLANs 2, 3 should only allow incoming traffic from VLAN1 or in response to traffic that originated on VLAN2 or VLAN 3 respectively.
• If you run a server at home, it’s best to put it on its own VLAN and create firewall rules that only allow incoming traffic from VLAN1. Then use port forwarding on the firewall/router to bypass the firewall rules for specific TCP ports (e.g. 80, 443).

If your network is large, document it using yEd or similar.

OK, I know that tool wars are for noobs, but this is going to be a rant.

I’ve been doing software development for decades and have used a lot of version control systems. I’ve been particularly fond of the rcs/cvs/svn series that has been in use continuously since the early 1980s. That line of version control systems has grown steadily and incrementally, adding functionality while retaining compatibility. SVN is now a very mature and easy to use version control system.

Along came git. Git has become immensely popular, in large part because software development is an industry dominated by the young. The young have no history to build on and so don’t understand the value of continuity and compatibility. To them, newer is always better. They are also remarkably tolerant of kluged software, often conflating excessive complexity with “power”.

Git has some clear benefits, most notably the local repository which effectively buys you a 2-tier commit structure. That’s good and SVN should develop a similar concept. Git is also very good for its intended use case: distributed project development with no central control (i.e. many open-source projects). Git is particularly nice when some of the developers have limited internet access. However, I find git problematic for a host of reasons that are rarely discussed. The biggest issue is that I have never worked on a project using git where users didn’t get into trouble. By trouble I mean losing work or having to find a git guru to help them be able to continue working. I’ve never seen that happen with svn. Never.

Moreover, one of the principle git criticisms of svn (the central repository) is actually the way most companies want to work. Central repositories live in secure data centers, are automatically and regularly backed up, and allow easy and fast access control so when a contractor/employee/etc. leaves, their access to the repository can be closed immediately. It’s why GitHub is so popular: it’s a central repository.

Git evangelists flood the internet with a-git-prop, much of it wrong or severely outdated. GitHub is also a massive proponent of git, pushing it mercilessly. There is no similar entity evangelizing for SVN and so the sheer force of marketing has been driving a lot of git’s success, but here are some sober analyses that present the other side of that coin:

• A year of using Git: the good, the bad, and the ugly – Ivan Krivyakov (ikriv.com)
• Subversion vs. Git: Myths and Facts (svnvsgit.com)
• GIT: a Nightmare of Mixed Metaphors – Earth…Brains…Technology…Design (wordpress.com)
• 10 things I hate about Git | Steve Bennett blogs

Ultimately, both git and svn are mature version control systems and no serious software projects would fail because they chose one over the other. However, for those finding this page and interested in picking a version control system, you might do well to to read some of the links above to get a more balanced perspective before making your choice. I use git when I must, but given the choice, I use svn.

For SVN users interested in git, here’s a useful article:
Git for Subversion Users (codemag.com)

As the pandemic re-surged this Fall, we started finding socially distanced outdoor get-togethers getting a little chilly. So I bought a Mr. Heater “Big Buddy” portable propane heater to help extend the season.

In the process, I’ve learned a few things about propane heaters I’ll share below:

• Gas or Electric Heat: Propane heaters are characterized by their heat output in BTUs; electric heaters are typically characterized by their power consumption in Watts. You can convert electric power consumption to BTUs by multiplying it by 3.41. So a 1500W heater (about as big as you can put on a typical circuit in your house) will generate the equivalent of 5115 BTUs. For comparison, the Big Buddy heater has 3 output settings: 4000, 9000, and 18000 BTU. A typical propane patio heater generates 48000 BTU or more. Bottom line: propane heaters can generate much more heat than electric heaters. An electric heater is probably insufficient for outdoor heating.
  
• Gas vs. Electric Cost: at typical electricity costs, a 1500W heater will cost under $0.22/hour to run. Exchanging an empty 20lb propane tank for a filled one costs about $20. 1lb of propane will run a Big Buddy heater on low for around 5.5 hours so the cost to run is around $0.18/hour. Note: if you use disposable 1lb propane camping cylinders instead of 20lb refillable tanks, the propane cost is much higher…see more below.
  Bottom line: heating with propane can cost about the same as with electric.
  
• How much heat: I should start by saying that I like things warm. It’s also really tough to heat a substantial area outdoors since the heat dissipates into the environment so quickly. Anyone with a fire pit knows that it’s only hot within a few feet the pit. In our early trials, the Big Buddy on high output made a 55 degree day acceptable when we were outdoors and fairly close to it (2-3 feet). I doubt it will be enough when temperatures drop below 50F; that probably will require the bigger patio heaters (and even then, not if it’s windy). I expect the Big Buddy would heat any enclosed and properly ventilated space (e.g. a garage with ventilation) fairly quickly even on very cold days. There are lots of testimonials to that effect.
  Bottom line: Good for Spring and Fall evenings outdoors and for emergency indoor heat (see more on indoor use below).
  
• Getting Propane: heaters like the Big Buddy can run on the super common 20lb refillable propane tanks used for outdoor gas grills as well as on one or two 1lb “camping” propane tanks. The camping tanks are usually disposable (DOT 39) and are *much* more expensive. At Home Depot and Lowes, 1lb disposable tanks cost around $5.50 each so heating using them costs around $1/hour (at the low-heat setting). Obviously the 1lb tanks make the heater much more portable.
  
• How long will a tank last: propane heaters can generate a lot more heat output, but at their higher outputs, they consume a lot of propane. At high output (18K BTU), the BigBuddy consumes roughly 1lb of propane per hour, so it will cost roughly $1/hour when run from a 20lb tank and more than $5.25/hour when using disposable 1lb tanks. The larger 48000+BTU patio heaters can get expensive to run (several dollars/hour) even when using refillable tanks.
  
• Refilling 1lb tanks: people try to save money by re-filling disposable 1lb camping cylinders from 20lb refillable tanks. There are loads of gadgets on Amazon specifically to do this and tons of youtube videos showing how. This is a BAD IDEA. Those cylinders are regulated by the US Department of Transportation (DOT) and they make it very clear that this is dangerous and you should not do it. They even made a video…see here. There is only one company that appears to make a legally refillable 1lb propane tank: Flame King (see here). I suspect they have a patent. You can get them at Lowes and elsewhere, but they are out of stock everywhere. A nice video on the refillable cylinders is here.
  
• Indoor Use: according to the manual (and everything I’ve read), the Big Buddy can be used indoors for emergency use only (i.e. if your heat is out due to a power outage). There are some caveats: you can only use it indoors on low or medium settings (depends on where you use it: bedroom, bathroom, etc.). You need to crack a window for ventilation and you shouldn’t sleep with it on. You shouldn’t have a 20lb cylinder in your house so you need to use it with 1lb cylinders indoors. I wouldn’t run a combustion heater indoors without a Carbon Monoxide monitor in the same room (I have these anyway since our house is heated by natural gas).
  Bottom Line: READ THE MANUAL AND FOLLOW THE INSTRUCTIONS.
  
  
• Adapter hoses: if you’re using the Big Buddy outdoors, especially in a fixed location like a patio, you’ll probably want to use it with a 20lb refillable tank both for cost and convenience reasons (you won’t constantly be replacing 1lb cylinders). Mr. Heater makes an adapter hose that you can use with a standard 20lb tank. NOTE: the Mr. Heater hose is made of a special material that won’t leech oil into the propane and eventually clog (ruin) your heater. If you use a 3rd party hose, it will be cheaper and more flexible, but you *must* use it with an oil filter (the manual provides the part number) and you must replace that filter annually (it fills with oil and then stops working). I’m using it with a 20lb tank and the hose.

• Stove fan: the Big Buddy used to come with a built-in battery-powered fan to help circulate the warm air. They don’t come with the fan anymore; I heard it was due to tariff restrictions. A number of people have added stove fans to their Big Buddy (lots of youtube videos) and I really like the idea. A stove-fan is a heat-powered fan (uses a built-in thermo-electric generator that converts a heat differential into electricity) so no batteries; they’re meant to sit on top of a wood-burning stove. People use a Dremel (rotary tool) make a notch in the fan body that will let it lock into the top of the Big Buddy grill. I’m going to look into that (make sure it’s safe and that the heater won’t destroy the fan); there are loads of stove fans on amazon.

Ultimately, I like the Big Buddy; it is well made, portable, and does most of what I wanted. I like that it can be used indoors as an emergency heat source and outdoors to extend the season a little. However, if you plan to entertain much outdoors during cold weather, you probably will want something bigger (a patio heater)…and be prepared to go through a lot of propane (fine with 20lb cylinder, not so fine with 1lb cylinders). In cold weather, the Big Buddy helps if you’re close to it (like 1-2 feet away), but don’t expect to be outdoors in shorts during the winter. An electric blanket/throw is actually the best solution.

Stay safe and warm!