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Defeating China's National Firewall

Bruce Schneier is reporting on his blog that a recent paper is discussing how to defeat China's national firewall. From the article: "However, because the original packets are passed through the firewall unscathed, if both of the endpoints were to completely ignore the firewall's reset packets, then the connection will proceed unhindered! We've done some real experiments on this -- and it works just fine!! Think of it as the Harry Potter approach to the Great Firewall -- just shut your eyes and walk onto Platform 9¾."

39 of 370 comments (clear)

  1. When are they going to realise... by Poromenos1 · · Score: 4, Insightful

    that most of the Chinese people don't know/care about the firewall?

    --
    Send email from the afterlife! Write your e-will at Dead Man's Switch.
    1. Re:When are they going to realise... by thebdj · · Score: 4, Insightful

      If these stats are even semi-accurate, then internet penetration is less then 10% of the population. I guess that would mean a whopping 90% really could care less about the great firewall. Now, how many of the 10% (roughly 110 million people) care about the great firewall? Well this is somewhat more debatable, but you'd have to imagine some of them are supporters of the current system and would therefore not mind...

      --
      "Some days you just can't get rid of a bomb."
    2. Re:When are they going to realise... by Random+Destruction · · Score: 3, Insightful

      If one really could care less, then one must really care. I believe you meant they couldn't care less, meaning they do not care at all.

      --
      :x
  2. Harry Potter??! by celardore · · Score: 2, Insightful

    How the heck is it anything like shutting your eyes and walking onto Platform 9¾?

    Maybe if the Chinese authorities found you on board this 'train', they could act like those terrible dementor things I guess.

  3. Irresponsible by Professor_UNIX · · Score: 3, Insightful

    It is irresponsible for people to post ways of bypassing the security restrictions a sovereign nation has enacted upon its people. If the Chinese people don't like the way their government is restricting their access to information then they have a moral obligation to overthrow that government, either peacefully via voting in the next election, or by force using a militia formed from the people. By showing the Chinese people ways to exist comfortably within the restrictions imposed by an immoral government we're not helping them to reach a better place in life.. namely a free and democratic Republic of China.

    1. Re:Irresponsible by jcr · · Score: 3, Insightful

      It is irresponsible for people to post ways of bypassing the security restrictions a sovereign nation has enacted upon its people.

      Why wait for the revolution before taking any other action? Your position is ridiculous.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    2. Re:Irresponsible by twiddlingbits · · Score: 4, Insightful

      Your post should be modded as Funny or Stupid (not Insightful) because 1) Chinese don't have elections with several parties, they are all from the Communist party and are approved office holders regardless of who wins, there is ONLY 1 party 2) Militia? WTF? The Chinese can't own firearms, and the last organized oppisition protest in Tiannimen (sp?) Square they squashed the opposition (with tanks) 3) It's NOT irresponsible for showing ways around Chinese Internet Security because the restrictions of the "immoral" Government don't ALLOW people access to information that they could USE to make China a better place. We are not showing them how to Exist comfortably within restrictions we are showing them how to get around the restrictions so they can share information and learn things that WILL allow them to have a free China one day. I'd rather we were called "irresponsible" and did something than be called moral and responsible but did nothing to advance the cause of Freedom.

    3. Re:Irresponsible by badmammajamma · · Score: 2, Insightful

      While the OP wants to cause enough distress that the people revolt, I also want to leave them be but it's because I think it's none of our fucking business. It's their country and they can do what they want (or not do anything at all). It's the interventionist attitudes of this country that cause most of the world to hate our fucking guts.

      If the Chinese people start an uprising and ask for help, that's a different story althogether. Barring that, stay out of their fucking business. I'm pretty sure you don't want Chinese people telling you how your country should work. Why would you think they would want anything different? Arrogance.

      --
      Any man who afflicts the human race with ideas must be prepared to see them misunderstood. -- H. L. Mencken
    4. Re:Irresponsible by csanford · · Score: 2, Insightful

      Was it arrogant for the United States to go to war with the Nazi's even though the Jew's didn't ask for help (which they may have, but the hypothetical idea still works)? Or how about the genocide in Rwanda? Or Darfur? The point is action should not be based on a request for help, but rather whether or not the act is moral. And if the Chinese people have any ideas about how to stop the NSA from spying on me, I'd be very happy to listen.

  4. DOS? by beheaderaswp · · Score: 2, Insightful

    If I'm correct, and I think I am:

    This has the potential to triple the traffic through their firewall as resets are sent for every packet. So consequently, not only is it an illegal act of hacking (even by US standards) but the potential does exist for a resulting DOS attack that could take the firewall down completely.

    Kids have to much time on their hands. No matter how "horrible" Chinese internet policy is by US standards, it's their damned network segment. Let them work it out for themselves.

    --
    Another consultant who stuck it out.

    "We are the Priests, of the Temples of Syrinx..."
  5. How to get drugs into USA by EmbeddedJanitor · · Score: 3, Insightful
    Why should American's be denied drugs just because their govenment makes such huge efforts to limit the drugs flowing into America? Here's how you can get those poor miserable people the drugs they want and need...

    See the parallel?

    --
    Engineering is the art of compromise.
    1. Re:How to get drugs into USA by JesseL · · Score: 4, Insightful

      I see the parallel, but I don't see what you think it proves. There are a lot of people who think that censorship and prohibition are equally immoral.

      --
      "Prefiero morir de pie que vivir siempre arrodillado!"
    2. Re:How to get drugs into USA by mi · · Score: 4, Insightful
      See the parallel?

      There is no parallel. The prohibitions on freedom of speech on and information about the different forms of government are uniquely self-perpetuating. Prohibitions on alcohol, drugs, and almost anything else are not like that and can be abolished by the popular will within a reasonably democratic society because discussing them remains legal, even if using is not.

      --
      In Soviet Washington the swamp drains you.
  6. It's not THEIRS by mrcaseyj · · Score: 5, Insightful
    >No matter how "horrible" Chinese internet policy is by US standards, it's their damned network segment. Let them work it out for themselves.

    The chinese internet doesn't belong to the chinese government, it belongs to the chinese people. When they have a real democracy then "they" (the people) can decide how to run it. Until then we shouldn't respect how "they" (the government) want to run the internet any more than we would if some bank robbers were holding hostages and "they" (the robbers) wanted to decide how to run the bank.

  7. Re:Detectable and Illegal by hahafaha · · Score: 3, Insightful

    I am neither a lawyer nor a Chinese resident, so I am not sure, but I don't think that it is illegal. If someone in China wants to connect to a server in the USA, and that server happened to be told to ignore reset packets from China, then that can't be illegal. If a Chinese citizen's computer just happened to be configured to ignore reset packets, then I doubt that it will be illegal. Having said that, actually looking at forbidden content is probably illegal.

  8. Re:Publish and Perish by wealthychef · · Score: 3, Insightful
    I have a feeling that instead they'll just roll up the death vans and execute those criminals. After all, if they are defeating the firewall, they clearly are up to something sneaky and are a threat to the existing order...

    But how will they know? You cannot tell if a remote host is responding to reset packets from your firewall, at least not directly. This seems like it will work.

    --
    Currently hooked on AMP
  9. Huh? Why can't they have help? by sirwired · · Score: 4, Insightful

    Do you recall that little American Revolution way back in the mid 1770's? You know, the one the then-English colonies were LOSING? The U.S. would have been in quite a pickle without the French providing financial and military aid. Sure, it was in their own self-interest, but that makes their aid no less valuable.

    Just because a Revolution receives assisstance from the outside makes it no more or less legitimate.

    SirWired

  10. Re:Publish and Perish by Anonymous Coward · · Score: 5, Insightful

    > You cannot tell if a remote host is responding to reset packets from your firewall, at least not directly.

    If you had to send multiple resets for the same port pair, they're ignoring you.

  11. Re:Publish and Perish by DAldredge · · Score: 2, Insightful

    Just wait till after the 2008 Olympics - China doesn't want protests so expect them to be nice till the games are over.

  12. Just a scratch on the surface by rmunaval · · Score: 2, Insightful

    Gimmicks like these wont last long. How many chinese would actually search for information against their government? Even if they do, they will always have the fear of being caught. Until every Ying Yang realizes the need to overthrow the system, nothing is going to happen.

  13. Why is revolution the only answer? by akratic · · Score: 4, Insightful

    Why do you think that the only legitimate way to deal with a bad government is to overthrow it, by election or force? What's wrong with getting a bad government to change its ways?

    Do you think that any time a government is doing something bad, that the government should be overthrown (or voted out)? What if a government is doing some really wrong things, but it's also doing some good things? Suppose you think that a President has done one thing that's very wrong, but that aside from that one thing, he's done a fantastic job. Are you morally obliged to vote that President out? Imagine it's 1948. You think Truman did a terrible thing when he used nuclear weapons in Japan, but you approve of everything else he's done, and you don't like Dewey. Are you morally required to vote for Dewey anyway?

    Do you think that armed rebellion is the only way for a non-democratic government to become democratic? If so, why do you think this? There are examples in recent history of non-democratic governments becoming democratic without a shot being fired (e.g., most of Eastern Europe). Or think about the way the U.K. changed from a non-democratic monarchy to a parliamentary democracy with a figurehead monarch.

    Have you thought about what would be involved in overthrowing China's government by force? For some period of time, China would be without any government at all. Think how wonderful it would be for a country with a population of over a billion and a large supply of nuclear weapons to find itself suddenly without a government.

    One way to get a government to stop trying to regulate something is to make its efforts to regulate it spectacularly ineffective. This happened in the United States with Prohibition. Why can't it happen in China?

  14. Drug Parallel by Archangel+Michael · · Score: 3, Insightful

    Why yes, I do. It is why I am a Libertarian. It is a huge waste of time, effort and money to stop drugs. Instead the government should regulate the HELL out of them like they do Cigarettes and Alcohol, and tax them into oblivian. Prolly would get rid of the Income Tax with the revenue.

    AND it would clean up the Drug Cartel Violence found in Brazil, Argentina, Mexico .........

    --
    Agent K: A *person* is smart. People are dumb, stupid, panicky animals, and you know it.
    1. Re:Drug Parallel by rhakka · · Score: 2, Insightful

      I agree with you, but isn't regulating and taxing them anti-libertarian?

      I believe a libertarian would say if a parent doesn't want their kids doing drugs, it's up to them to stop it, not to the government to regulate it. Who is the government to say who should use what and how much?

      Again, I personally agree with you 100%, just wondering how you reconcile your viewpoint with libertarian philosophy. Since that is one reason I am no longer a libertarian, though I still consider myself a civil libertarian.

    2. Re:Drug Parallel by packeteer · · Score: 4, Insightful

      More people die from the narco traffic violence than from the war in Iraq in the same time period. All of these deaths are caused by US policy but nobody cares about people dying who are not in our country. (One of) the reasons we invaded Iraq was to spread democracy. If we really wanted to spread democracy we could first start by legalizing and taxing drugs in the USA. This would nearly shut down many of the large violent drug cartels that keep dictators in power.

      --
      unzip; strip; touch; finger; mount; fsck; more; yes; unmount; sleep
    3. Re:Drug Parallel by JesseMcDonald · · Score: 3, Insightful
      Libertarianism isn't necissarily opposed to taxes and regulations. It is opposed to FORCED taxes and regulations. Taxes should be "optional" in the sense that if you "use" (buy/sell/trade) something that is taxed, you are volunteering to pay/levy that tax.

      You do realize that this policy would justify every existing form of regulation and taxation? Income, after all, is nothing more than a straight trade, currency for labor. Even inheritance taxes would be justified, since inheritance is a gift from one person to another, and gifts are merely a subset of trades in which "goodwill" is traded for tangible property. What, then, would you consider a "forced" tax, since you have apparently chosen to define all taxes and regulations as "voluntary"?

      More generally, any claim by a third party for a portion of the goods exchanged in any trade against the will of both the buyer and the seller must be considered theft from a libertarian point of view. That includes all taxes, which -- by definition -- differ from trades only in that they are coerced, i.e. non-voluntary. That has always been the libertarian position, despite the claims of the so-called Libertarian Party to the contrary. The LP has been sacrificing libertarian principles for political power for some time now; their present goals, while more liberal than the two major parties, are hardly "libertarian" in nature.

      --
      "The state is that great fiction by which everyone tries to live at the expense of everyone else." - Bastiat
    4. Re:Drug Parallel by Elemenope · · Score: 2, Insightful

      "I am a Libertarian [...] the government should regulate the HELL out of them"

      No sir, you are NOT a libertarian. A libertarian would want heroin to be available from your local Wal-mart on the same terms as table salt.

      "I am a Christian [...] the filioque controversy was damned silly"

      No, sir, you are NOT a Christian. A Christian knows the spirit proceeds from both the Father and the Son.

      The gap between ideology and philosophy is huge, and the gap between labeling and ideology is even bigger. Libertarianism, like Christianity, can encompass many, many diverse, sometimes contradictory ideas under one quaint label. Incidentally, regulation, or the extent that power can be used in coercion legitimately, is one of those things upon which people who are 'libertarian' can honestly disagree. Some are absolutists on the principle of coercion, others see room for compromise in certain areas when a knee-jerk ideological reaction doesn't seen to serve well the needs of people in reality.

      --
      All the techniques ever used to make men moral have been themselves thoroughly immoral... (Nietzsche)
    5. Re:Drug Parallel by collectivescott · · Score: 2, Insightful

      While this is quite true, it ignores the fact that many Americans are dying from our drug policy as well as foreigners. From quality and substitution issues with the drug itself, turf wars by gangs, police injured by people attempting to evade arrest, et cetera. Not to mention the fact that thousands are locked away for life... they might as well be dead too.

    6. Re:Drug Parallel by pestilence669 · · Score: 2, Insightful

      Just to play devil's advocate,

      Why NOT legalize drugs for children? Many school districts require parents to medicate their kids if labeled "attention deficit disorder." That's compulsory amphetamines for kids mandated by the state. Ritalin & Aderall = amphetamine derivities = speed. I could imagine that some of these little tweakers might want to smoke a joint or two to slow down. It's not like they have any say in the matter... yet it's the "children" that drug laws are supposed to protect.

    7. Re:Drug Parallel by rhakka · · Score: 2, Insightful

      That's interesting. Why would parental supervision be suddenly inadequate for drug usage, but not for other things like policing television viewing, books, music, etc? As I'm pretty sure the libertarian view would frown on the nanny state's filtering of public media, yes?

    8. Re:Drug Parallel by JesseL · · Score: 2, Insightful

      L(l)ibertarianism, unlike christianity, has been pretty clearly defined. The non-aggression principle is that definition. Even the Libertarian party pledge states:
      I do not believe in or advocate the initiation of force as a means of achieving political or social goals.

      While some people who consider themselves to be libertarians may hold contradictory ideas, or support taxation and regulation, these are NOT holding with the libertarian ideal or Libertarian party policy.

      --
      "Prefiero morir de pie que vivir siempre arrodillado!"
  15. Re:Detectable and Illegal by s13g3 · · Score: 3, Insightful

    i am neither a lawyer nor a Chinese resident, so I am not sure, but I don't think that it is illegal. If someone in China wants to connect to a server in the USA, and that server happened to be told to ignore reset packets from China, then that can't be illegal. If a Chinese citizen's computer just happened to be configured to ignore reset packets, then I doubt that it will be illegal. Having said that, actually looking at forbidden content is probably illegal.

    The problem hinges on the fact that the is no (enforceable) law preventing the Chinese government from doing what it likes to who it likes that does anything they don't like. Remember, they require no warrants, no subpoenae, and no trial. They only have to notice that you have accessed something they don't like enough to pay attention to you, and you're toast (see above mentioned death vans).

    Perhaps, as another poster mentioned above, the Chinese will restrain themselves up unto the 2008 Olympics, but I doubt it. Again, see the above death wagons, which "look like any other police van." Also, whoever said they haven't got the resources is deluding themselves. If the RIAA has the resources to track people downloading illegally (though the lack the resources to document and prosecute anywhere near the majority), there are 1.3 billion with a "B" people in China. Even though you don't hear about it much, they assault US networks (telecom and government) with regularity. I'm sure they have enough people to monitor home traffic closely enough to suit their purposes - remember, all it takes is a small app to parse logs for forbidden traffic in the past X days or whatever. Combined with random live monitoring and historical traffic analysis, I'm sure they can monitor more than enough to make it as unsafe to commit thought crime on the internet as it is for the average American to get away with hacking the average website hosted by a paranoid provider. I rather doubt they care about anyone posting on /. too much (especially if you are a foreign national simply visiting family there), but if they even begin to think you're a subvesrive engaged in treason or sedition, pO.of, you're done, no proof required. Stop, do not pass Go, do not collect $200. Go with the nice men in blue uniforms directly to the "police van that looks like any other" parked right outside your front door.

    --
    "Inveniemus Viam Aut Faciemus" 'We will find a way... Or we will make one!' --Hannibal of Carthage
  16. Re:Publish and Perish by timeOday · · Score: 4, Insightful

    Yes, we can mock the Great Firewall implementors for incompetence, but let's remember that the technical means are really only a reminder of the underlying law. Many laws don't have any built-in means of enforcement at all. My car has no speed governor to keep it under 65 mph, does that mean the government is just stupid? Or that I can't get busted for speeding? Almost all laws are easy to break; the real problem is getting away with it, especially if the government decides to target you for whatever reason.

  17. Not Chinese but their neighbours who are victims! by Anonymous+Bullard · · Score: 1, Insightful
    Do you not realize that the Chinese regime is not only controlling their native Chinese population but they've been in the process of sucking the life out of their neighbouring Tibet for more than half a century now!?


    I feel a lot of sympathy for the Chinese who've died or who've been jailed and tortured for disobeying their formerly communist and now fascist regime, but in the end changing that is up to the admittedly indifferent and mostly indoctrinated Chinese population.

    However when the Chinese people allow their communist party gestapo to continue raping and demolishing their *peaceful* Tibetan neighbours, *that's* something no decent person in the whole world should tolerate without taking some action.

    It's both ridiculous and ironic at the same time that the general indoctrinated (everyone's spending a minute in the Chinese "education system" gets a full load of brainwashing, that is a verifiable fact) Chinese population is taught to hate the Japanese to their guts for what took place in *parts* of China during their *civil war* over sixty years ago while these same idiots are absolutely idolizing their own expansionism-driven 100% destruction of Tibet.

    *That* is what should drive the action against the Chinese regime by both decent Chinese people (who are few but do exist) and anybody else who feels that wiping out a peaceful nation (which Tibet was for centuries after adopting buddhism) can not be tolerated.

    Geeks with respect for human life and dignity can play a major part in breaking the fascist Communist Party's stranglehold on information. I've made my informed choice and you can either 1) play ignorant and sympathize with the Chinese regime, 2) wash your hands and ignore the whole thing, or 3) figure out ways to try and stop the madness driven by the Chinese dictatorship. It's that simple.

    --

    Should invading one's peaceful neighbours be opposed, or rewarded with trade deals?

  18. Cisco will be upset! by Helpadingoatemybaby · · Score: 2, Insightful
    Somewhere, a Cisco employee in the US will have to now form a team to make sure that the Chinese government can repress unhindered.

    Then he'll go home to his wife and kids, proud that he's done a good job. If you're here, raise your hand.

    Kind of funny, eh, that repression has been outsourced to us now. (Yes, Cisco helped set up the great firewall, sold the equipment, and worked extensively to prevent free access by Chinese citizens.)

    --

    The baby's fine -- please stop sending business cards.

  19. Re:Great walls not so great in China by WilliamSChips · · Score: 2, Insightful

    Great walls are never great. Look at Berlin as well. And now look at what we're trying to do in America. Every 'great wall' becomes a tourist attraction.

    --
    Please, for the good of Humanity, vote Obama.
  20. Re:Publish and Perish by complete+loony · · Score: 2, Insightful

    Are you going to track every blocked connection for a whole country? and keep them in memory? Remember this is the content filtering part of their defences. I assume they have some address filtering as well. So it might not work for everything (eg /.).

    --
    09F91102 no, 455FE104 nope, F190A1E8 uh-uh, 7A5F8A09 that's not it, C87294CE no. Ah! 452F6E403CDF10714E41DFAA257D313F.
  21. Re:Spoofed resets don't work against a modern OS by Charles+Dodgeson · · Score: 2, Insightful
    To do a third-party reset you have to be able to send the reset in real-time or each endpoint will have advanced their sequence window (actually the ack window is what matters).
    Remember that in this case the third party is in the middle and so is perfectly capable of sending resets in time.
    --
    Prime numbers are exactly what Alan Greenspan says they are -S. Minsky
  22. Re:Publish and Perish by popsicle67 · · Score: 2, Insightful

    The Great Firewall will come down and there is a good possibility that the Chinese government might have another trick up it's sleeve to cut off what it considers unsafe. That being said, the Chinese are also pragmatic. They do see the writing on the wall(hee hee) and are more likely trying to control the end of this present paradigm so that they end up with many of the same people in power and of course they all wish to remain breathing. Uncontrolled revolution can be quite messy and bad for the health and a country the size of China can cause a lot of collateral damage if open revolution breaks out.

  23. legitimacy decays over time by circletimessquare · · Score: 2, Insightful

    mugabe was once a hero on the street in zimbabwe

    ask the street what they think of him now

    i have no doubt that nationalism is fervent in china. i also have no doubt that a chinese person can separate pride in china from pride in the CCP. i am proud to be an american, but i don't like the bush administration. see how that works?

    additionally, in 2008, i know bush won't be in the white house anymore. and i will get to add my voice to who the next leader will be. and so i am happy with how my government works, even though i don't like its composition right now

    that's called legitimacy in the eyes of the people. it creates confidence, stability. can your average chinese citizen say the same about their relationship with their government?

    my point is very simple, but if you don't want to accept it, that's fine: but democracy is the only form of government known to mankind that manufactures legitimacy. every other form of government, legitimacy decays over time

    i'm certain other governments have and will retain mythical status in the eyes of their people, even if they aren't democratic, for decades even

    but unless the people are consulted again, that legitimacy will eventually decay into resentment

    it's a simple straightforward concept

    --
    intellectual property law is philosophically incoherent. it is your moral duty to ignore it or sabotage it