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fuss:tor [2015/10/06 06:19]
office [Updated Debian Packages]
fuss:tor [2017/02/22 18:30] (current)
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 +====== Speed ======
 +
 +Some optimisations are possible, for example:
 +<code bash>
 +AvoidDiskWrites 1 # Avoids writing to HDD (obviously)
 +DisableAllSwap 1 # Keeps everything in memory as much as possible
 +HardwareAccel 1 # Enables hardware acceleration for generating crypto keys
 +AccelName rsax # RSA Engine
 +LearnCircuitBuildTimeout 1 # Enables circuit learning
 +CircuitBuildTimeout 4 # Try 4 seconds before abandoning to build a circuit ​
 +KeepalivePeriod 10 # Keep alive for pesky firewalls
 +NewCircuitPeriod 30 # Build a new circuit every 30 seconds
 +NumEntryGuards 8 # Keep 8 entry guards alive
 +StrictNodes 1 # Respect node exclusions
 +SafeSocks 1 # Use properly configured socks5 proxies
 +##
 +# These settings will allow single-hope circuits and defeat the 
 +# purpose of staying anonymous. On the other hand, they will make 
 +# Tor noticeably faster. If your unique concern is hiding your 
 +# IP, then you can enable them at the expense of anonymity.
 +AllowSingleHopCircuits 1
 +ExcludeSingleHopRelays 0
 +FastFirstHopPK 0
 +##
 +MaxCircuitDirtiness 300 # Cycles proxies every 5 minutes
 +LongLivedPorts 80,443 # heh . . . xD
 +NumCPUs 2 # number of CPUs to use
 +ClientUseIPv6 1 # Set to 1, "Tor might connect to entry nodes over IPv6"​. ​
 +</​code>​
 +
 +In order to make ''​TOR''​ faster, you can exclude some countries from the list of nodes that ''​TOR''​ will proxy though. The list below is the entry that you will have to add to ''/​etc/​tor/​torrc''​.
 +
 +<code bash>
 +ExitNodes {hk},​{kr},​{jp},​{lv},​{ro},​{be},​{ch},​{bg},​{il},​{sg},​{tw},​{ad},​{lu},​{mo}
 +</​code>​
 +
 +Then you can perform your own speed tests and start to eliminate countries that are slow for you. A good resource is the [[http://​www.netindex.com/​download/​allcountries/​|net index by ookla]] which provides a very generalised overview of internet quality based on upload and download statistics.
 +
 +===== Systematic Approach =====
 +
 +''​TOR''​ tries to build a circuit in the time specified by the setting:
 +<code bash>
 +CircuitBuildTimeout 4 # Try 4 seconds before abandoning to build a circuit
 +</​code>​
 +
 +Ideally, if you want to determine what the best routes are for you, you would set ''​CircuitBuildTimeout''​ to ''​1''​. Then you would restart ''​TOR''​ and try to connect to ''​www.google.com''​. You will be redirected to a ''​TLD'',​ for example ''​www.google.gn''​. You make a note of the speed and then restart ''​TOR''​ and browse to ''​www.google.com''​ again. If you repeat this several times and ''​www.google.com''​ redirects to ''​www.google.gn''​ you can assume that you have found a very fast path and you can take ''​{gn}''​ off the ''​ExcludeNodes''​ list.
 +
 +After that, increase ''​CircuitBuildTimeout''​ to ''​2''​ and repeat the procedure above. For many requests and for small values of ''​CircuitBuildTimeout'',​ you will find the shortest paths and the ''​TLD''​s can be taken out of the ''​ExcludeNodes''​ lines.
 +
 +A combination between this procedure and [[http://​www.netindex.com/​download/​allcountries/​|net index by ookla]] should give you very good results. This was tested and from a crawling ''​TOR''​ that would load google in 10 or more seconds, we brought it down to barely noticeable speed. There were also no upstream proxies, and even if they were, the countless reloads should have compensated for them.
 +
 +Also note that the ''​CircuitBuildTimeout''​ has a direct relation to your privacy since you will find the shortest circuits using this method, but you will also end up using them frequently. However, it will still mask your IP address and if that is your unique consideration,​ then you can safely set ''​CircuitBuildTimeout''​ to ''​1''​.
 +
 +===== Speed Patches =====
 +
 +These are various patches, hacking around tor (most likely breaking anonymity in favor of speed). The patches are against the git version but similar code can be found in the release versions.
 +
 +==== Close Nodes ====
 +
 +tor defines the option ''​EnforceDistinctSubnets''​ (and enabled by default) in order to not build a circuit through a ''/​16''​ netmask. This patch changes that restriction to a ''/​24''​ netmask (''​255.255.255.0''​).
 +
 +<code diff>
 +--- src/​or/​nodelist.c~ 2013-07-04 08:​14:​35.000000000 +0100
 ++++ src/​or/​nodelist.c 2013-07-15 22:​20:​39.000000000 +0100
 +@@ -959,7 +959,7 @@
 + ​addrs_in_same_network_family(const tor_addr_t *a1,
 +                              const tor_addr_t *a2)
 + {
 +-  return 0 == tor_addr_compare_masked(a1,​ a2, 16, CMP_SEMANTIC);​
 ++  return 0 == tor_addr_compare_masked(a1,​ a2, 24, CMP_SEMANTIC);​
 + }
 + 
 + /** Return true if <​b>​node</​b>'​s nickname matches <​b>​nickname</​b>​
 +
 +</​code>​
 +
 +This can be found in ''​routerlist.c''​ on tor version ''​0.2.3.25''​.
 +
 +==== Circuit Length ====
 +
 +Allow ''​2''​-hop circuits instead of ''​3''​. It is not clearly defined how many hops will protect your anonymity (except for the general "the more, the merrier"​ guideline). So, why not use ''​2''​ hops instead of ''​3''​ - or increase this value for longer circuits.
 +
 +<code diff>
 +--- src/​or/​or.h 2013-07-10 06:​12:​22.000000000 +0100
 ++++ src/​or/​or.h~ 2013-07-10 06:​09:​02.000000000 +0100
 +@@ -4153,7 +4153,7 @@
 + /​********************************* circuitbuild.c **********************/​
 + 
 + /** How many hops does a general-purpose circuit have by default? */
 +-#define DEFAULT_ROUTE_LEN 3
 ++#define DEFAULT_ROUTE_LEN 2
 + 
 + /* Circuit Build Timeout "​public"​ structures. */
 + 
 +
 +</​code>​
 +
 +====== Bad Nodes ======
 +
 +There is an ''​.onion''​ website that advertises itself as a judge of bad nodes, it can be found at: 
 +
 +  * http://​xqz3u5drneuzhaeo.onion/​users/​badtornodes/​ (darknet)
 +  * http://​torstatus.blutmagie.de/​index.php (clearnet)
 +
 +and they can be used to generate ''​ExcludeNodes''​ and ''​ExcludeExitNodes''​ configuration lines for Tor - obviously, you cannot be sure whether these generators are trustworthy.
 +
 +===== Last Update: March 10, 2012 =====
 +
 +The following is a generated list of fingerprints that are deemed to be misbehaving. The site above was last active on March 10, 2012 so this list may be outdated. The two lists below should be added to the Tor configuration file:
 +
 +<​code>​
 +## Bad Nodes
 +ExcludeNodes $c730f00eb35eddf4f9b99c957f3c16656e5ca29c,​ $354e2ed163ba928e2e5f40819f6df2b97988df73,​ $bbefffa108ad16b8e5f0323cf086811c17190bba,​ $f941e14100a9a9b00cbeb55c72dfa211ef98bdf2,​ $0ddd660e450f8aa852226a28b5bfcaa914911e30,​ $a75bea3bf10978ecf210b7651b19bfe3f70e7fe1,​ $29d05c706c12baa12ae889caf81554d266948f79,​ $cff48861e1a2774bf0d483998198cfecea9ff477,​ $79b8ad256fb269416747697be0e854f84442efe9,​ $b827f69101b71c05a956bfead8ad152b6541223e,​ $85173744907a6599c9f718bebd51353c5a094d49,​ $daf53151f62800e34a398e7cc3416b935deb546c,​ $1d6deac8364d9d6c42cc4fb83c364c7b71ae8691,​ $2bc4012f2193cb92b9995f42e987ba0044098b30,​ $91ede73fb8c2edca41ffc86539f36213844376c4,​ $5d84518804ab4b032531b2647603fe1c5e569c26,​ $4205c064e59aaafeadd2ace80d705183c4f2758a,​ $14f04a0861b913bfcac1eabac74a1f47bdf41f3a,​ $1f9803d6ade967718912622ac876feef1088cfaa,​ $eda829cba890bbb30fe5be04779d83044126ba67,​ $fe0551589d19dcbeb193fe78a9a003a8a2fc09aa,​ $6c7c819f808ac125c69e1d981f350dcba44da8b5,​ $35bdc6486420efd442c985d8d3c074988bfe544b,​ $43be706e24143ab6b3b86dbf7cd4fde1e0c4caf1,​ $103827708bd078eec737137585eccb5bcea6424b,​ $8ff73b8fbfbf2ccb52a8e46a515418f97a69c812,​ $f2244a8d5da14359cda1dab70f328e62e74e9837,​ $c9be2c39ca4e6f120293c80d2cbe2bc34f3a1f30,​ $bcc93397b50c1ac75c94452954a5bcda01f47215,​ $ee25656d71db9a82c8efd8c4a99ddbec89f24a67,​ $1b777f2c879c76fc529d1ec63508aad0e1759e79
 +
 +## Exit Nodes
 +ExcludeExitNodes $36ddc2eb59a84da313112cae186ecef4acbfcfd5,​ $5eb6c2094c4ac42d3fbd1cba25fc3b4196e2ff83,​ $94d587cd723e3def95616fc75489c45303df9aed,​ $55ea8b4b1c8f066baf7c2979ddfd00f8276038f4,​ $ea23975f961ac2b8941ca52da67efb1cbfca18ab,​ $0a35553a4aa10831f3f2143eacc8539632d9541c,​ $c813d142c092ac01f2f20970dba7086b8a7e52a3,​ $eeefcb3d12571e00d96286e65dea2ae6b40e73b4,​ $4d13bb7a08e14952e346cfbcb3cf5c45bb228cf4,​ $bbc05ff7c09b6a0122861d5ac7fea75b89d7212c,​ $9c8bb2a38d99283c4acefb1ad4f52a23413787d6,​ $7c18ee0cb68a259ba6ce0001f2f7b8180a875a6d,​ $0343fa5be98bb751492244bcd211d493e6340f9a,​ $76d583de43c20d7e05f5e5e878591e40cba5353a,​ $3df610e0a277f7d90f3ee7192dbb08caff3727ee,​ $e1cd3b6c24700e1aa236295ddba2c84a0fea7a67,​ $9dd7f70e41bebf8f3cb5a2419643ce108d9b69e6,​ $5168ba1a59afa8557cfc521b5f547c3891eaf106,​ $d63587fd607aed803cd8ced9ddb5076f99752c65,​ $19a564c7856788f9bf3004e099d864a7802502a9,​ $47bbde163dc80f5f5e666698ab4b97900dcff929,​ $acbacb92581c078cc6e285075cfef467e9ccf76a,​ $7aa23f871264e0d006ec12ef9eb229a2015023fc,​ $5af9d6f4ca429110a3504742ae7852eba2aad64b,​ $405b07b30586bc5ddef77f4f3b8d831ccb0e541b,​ $cb982649a0785639a3891e89d4e165a44ad3f60b,​ $c44fa995abb9c18969464cc479d3d722250a9ecb,​ $59e87afdb5d3effce63afdfa3c0b00eb8d07db82,​ $e566ad3c6fc7dea0a3356ddfbb6b57ca79d74cd6,​ $a3931b4c5a41cdef29987351d541e424e4a5b77f,​ $ce57a98cec55c767c1dab14507915b893b8b777d,​ $c647d56c900ceea91eee2d3249ef949e29dc57e8,​ $afb32eead177efc7d2bd1ae7b890dae448c60237,​ $bce9ebe70016fb4c54ed549c4d8f035d7888d04c,​ $c7d92fc915f118b7b75e137f11a29413158bd2b5,​ $7e0b691c7b6f48304a31098cf6a12c502f1c45ab,​ $9f6589962c1f58478a38d4da85d36c81fdb8c0a0,​ $726df9cede96a3e70282234fccf827e435291853,​ $14153d9bfdd77e477ff5bb5f7b87af4f581f6285,​ $c53c81a5c6c89903acacb0db1c8e2b6c91c074a3,​ $471886434d7abdb62c216217c2b50cb50ebec6b3,​ $f19aeeccf966e49b9eef429e43c8cf9362edeacd,​ $e2f501df1c17737bddf155b9f57612a09bfc1ef8,​ $90804a60f89789d44a16a88596598fbc8f5e177b,​ $eee5603baca71acc9d7634e6ffd824003f3fdc39,​ $1d61e0b75e8e127693bf2dc1f2904b58f50249d9,​ $bc808734c6c7a166403c69f8f42a5b6ef8065f8c,​ $97400af2a769188357f9198a9da584531c6b7ce6,​ $019ef7dbc8d67ccca755128ef73d118e381e09ec,​ $d587010aac789741178b435fae48c6624c3d502c,​ $df94ad444c1d0a1060c8ba1114245798687ad3a7,​ $1bd40c7a3a4d1e5c8285d9e5695ea3f21a3951e0,​ $84ca95a4d9e824c6f9662711b887433525760f72,​ $ad1dab3a9fcb6ec81a518c4bb98f28e8faeea1ac,​ $11d3c5445af4d57a65551affc8469e11659daa35,​ $510adf1cc8e0d9ba763afc8e018c3d83e5f055a8,​ $ec714625c4ffc32e22b67dc425d336de00b3bd8b,​ $8bb21f7686ae18672debcdfe0892b6f0b280e75e,​ $2a4ea2effa76c10779ae06d1f14a8c835f7abe2f,​ $e9d9e02eda5419dae55ee381367b261f7dd31f6e,​ $1e8a60cbf29f2b35071442a4bb57b8eb47a8b947,​ $a06fb187d6d88edaffc878eb6f1df0c5b59aa333,​ $7eaa3c48a3483ac67d81816d356cd7d04d7fd1db,​ $ab674b8bd8cc779c581f25e0da86612f000c8b26,​ $ac51642fa7a01c47b66f9747abb41a2bc07c41f4,​ $e63337786b7e1fb2480e798c0a6c951e2d56e913,​ $01e80769f0739b5fe49ba0343e7f0249350a0bd6,​ $8bd75f9675f0b87496e89e4025558c45ba75123c,​ $94e0927767f8c20d73eb458b1dfdaf8426431c55,​ $cf57a5358addf413d4e7c1267a99394bd2cf8523,​ $c0e236c6e9a6b29efe247dcbc8a1eaaac247770c,​ $192fa9d6e9a27024f6e733a6196d33cc8425d1c9,​ $d5edc74f2fb81e6ac1a8eba56448f71ddfaa4ae5,​ $3a3797558ea5e974278e7c060c1e994411dc2cc6,​ $89b3a6eb23686f2326c5d3437244897f7cef9aeb,​ $8a560069c696d0cd50408be284c85b6d2a6e0b9a,​ $055d304e29cf064a8cb8ab2c13aedb836bb79af5,​ $6586cee14353dd1e6faf3f172a23b00119a67c57,​ $09c0c5800177bf3a11a78a98a1cafd8e7ad2ea02,​ $269533885d491544b862af6497c058892d7f308a,​ $1df79e5a8901463383f01c58fba72f4a1d3f4a94,​ $a2c7c344a899233c0768401b9c340574d8a2643b,​ $d1186220c52e61134cbdbd68fa4cf0ae0c75015f,​ $6f383c2629471e1ae7da053d04625aaed69844cc,​ $07e226ccd6e50700a669906688f0661031cc56c1,​ $b0c142c97db514db3a419d1aa4ce04e1a86c151b,​ $f349b8f53ecd2c02349983ea8c8f615ad753a275,​ $38652dc45e38ccd4c5b00746a2c7bd536f97e1c0,​ $ba8539403b5e698a93d907dfea8b48ff2b81a4c3,​ $579888c8a61b99e3a2942b7415aa0a1b9f6a7e9d,​ $404b3594dc6bb205e43f0bd0b168a78c6aa2c88d,​ $8e670205cf878f3e50db014d77f0f8070eb1c611,​ $02460816d52f14ad4c068eee71b255582caccea4,​ $8c6595deabf0a0dd81835471fb6c044bdcfb1f8e,​ $3d168107bbbfc5213dcd83cfd7918d4f8eb8bb4a,​ $bb73111ec9a138c39e3a49c5aa89ce8864ee804a,​ $dcc44bfc8ada4e5d750e675b653f2ae28690cd31,​ $639ecc2d4fb514a8dee938c4210a49bed7859604,​ $cd053c104bc559c791c3fd5d3bd6fb8fac6edb88,​ $7697c880eb2051d361f29d383b87d1b5c2baf8f3,​ $4780f09fd8156d2471d276c4ae8b4364795bba53,​ $11a0239fc6668705f68842811318b669c636f86e,​ $71e78e9b961d5e25f1a16fccd15e81aa3b36cb93,​ $3d0fafb36eb9fc9d1efd68758e2b0025117d3d1b,​ $5a6fc0957b9b2eab36595c5913897f8daafd1272,​ $35e8b344f661f4f2e68b17648f35798b44672d7e,​ $25658a5df26121f7da21eda6ccef9b8d0ae8d79e,​ $d0d9758796ee8ad89769fef8d11e4fa60642cc55,​ $9530c61386be6a0087e80752223534c18df4b3ff,​ $8e068a19835bfe4adee57a51d96ef0598723517d,​ $82b38a8c3cf979b9faf547620072e6b538cc10b8,​ $412260256ce25cd5c155b00e14fa2d30a9533374,​ $96271599012517d202a7ca90133d7e0cc434a11d,​ $03ac5b7f2cf317f074db78c7988ebafebada47cf,​ $494ba52ce8a1683332c3c77c403192069eea0155,​ $47916cab5878c810e7ef71a316d37fc823cc7f52,​ $659df6537d605feab3b77e58e75342d704f0a799,​ $9f5db40b02b5b9171e9deaee62d89d5562572c37,​ $a9c039a5fd02fca06303dcfaabe25c5912c63b26,​ $92d151a8219cc742de7e0eaeb6d18faf9793ba79,​ $3077df82e3e8958d5f9bb02fa0a2d1ecade8f411,​ $76544bba2a1f3e73b05d4d78ae01de1b5acd7a00,​ $a07177486a1f51b041d0205d2675b3c9ef6569ce,​ $caf7986ecf1fbf903e68155531f8930c9ecc3a0d,​ $48949e6050aada3c9c0980d13036a2097b7c575a,​ $70ff4fda8f72207907b0948709a2dd2b360622d4,​ $8908f39e78d60e766179243f5661b5862fdf029e,​ $810962dc3c058c757070420e9a9497532bb8185a,​ $9b41b9b3d4661566c660096b715bc647fbd72a72,​ $3e96079b64d7d0ed602c9245772b491362b83b31,​ $4800e53b039aa14a69104bb54473bd75e2d310c8,​ $320c2c69edd602517a8bdd24032529f0de431aaf,​ $fc35de87f6e4022693323275f6b8ee5f72fd21b5,​ $58ca3b6414e859ade539a61f476d6dcbe1411652,​ $103827708bd078eec737137585eccb5bcea6424b,​ $885f25f704b12223f823758f8443bcbf17378a8f,​ $a28642fce5be5805a907c1c8b95f6876be11b337,​ $258a5503d00fcc540c5d7234a63ddbe7fb55a2c2,​ $f5a78ed829191d76c7399b86e4429f8f663e0c02,​ $d3ed911183df31fdb744a22f94be6a856ac77d12,​ $023220505a550d6fdf0c20ff7c48e66ba06a49a6,​ $134e9b5d16a3027d2fcf60a78c1be9355b4fa99e,​ $78ea229c038a7e1d09ddf36be13ca565d5002fc6,​ $f6e9c0b2c07460ffdb564a9954c8d6859199fa6c,​ $6cc6f0c09acdb2c48feccaa89bb0fe630f59a709,​ $fbadb0598b2fe16aa1a078187620ec4c2df08451,​ $63e939b53dcb491876b92c688c5b176b361e7e51,​ $3cf38e32941e54acebb720f5f2b1feea77927cbe,​ $97900d053b21aef9dc98e712d440fd13890b5f69,​ $f55bfeb3befe9efdee5c9bfc997ab1efc1efbdf9,​ $f6dd866296210b17fee010c3e4a2e0c9e52e6717,​ $9d4d995aa745a3caa6276afad505d3e4097aa075,​ $65c35c03571307d7546d6978605a6b11b473f6ee,​ $4186509c707e96b77b51a76f8294d7e22ff52c61,​ 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 +</​code>​
 +
 +an effective solution is to add the ''​StrictNodes 1''​ option to the Tor configuration file as well to ensure that these nodes are never used.
 +
 +====== Enable Hardware Acceleration ======
 +
 +To get list of engines, first issue:
 +<code bash>
 +openssl engine
 +</​code>​
 +
 +which will output a list of engines:
 +<​code>​
 +(aesni) Intel AES-NI engine
 +(rsax) RSAX engine support
 +</​code>​
 +
 +Then, edit ''/​etc/​tor/​torrc''​ and add the following directives:
 +<​code>​
 +HardwareAccel 1
 +AccelName aesni
 +</​code>​
 +
 +in order to use a given engine.
 +
 +Under FreeBSD, you should load the ''​cryptodev''​ module:
 +<code bash>
 +kldload cryptodev
 +</​code>​
 +
 +which should give you access to the ''​cryptodev''​ FreeBSD engine. You can make loading the module automatic by loading it from ''​loader.conf''​.
 +
 +
 +
 +====== Updated Debian Packages ======
 +
 +To install the latest Debian package from ''​torproject.org'',​ first create a file at ''/​etc/​apt/​sources.list.d/​tor.list''​ with the following contents:
 +<​code>​
 +deb http://​deb.torproject.org/​torproject.org stable main
 +</​code>​
 +
 +After that, import the GPG key for the repository by issuing the following commands:
 +<code bash>
 +gpg --keyserver keys.gnupg.net --recv 886DDD89
 +gpg --export A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 | apt-key add -
 +</​code>​
 +
 +Now update the sources list:
 +<code bash>
 +aptitude update
 +</​code>​
 +
 +and upgrade:
 +<code bash>
 +aptitude upgrade
 +</​code>​
 +
 +====== Compile a Static Tor ======
 +
 +First download the relevant packages:
 +
 +  * Tor
 +  * OpenSSL
 +
 +to, say ''/​usr/​src''​. Then compile OpenSSL:
 +<code bash>
 +./config ec_nistp_64_gcc_128 shared zlib-dynamic --openssldir=/​usr/​local/​openssl
 +</​code>​
 +Note that ''​ec_nistp_64_gcc_128''​ enables elliptic-curve cryptography and it can be used by Tor.
 +
 +then you may need to run:
 +<code bash>
 +make depend
 +</​code>​
 +
 +and then to compile issue:
 +<code bash>
 +make
 +</​code>​
 +
 +and finally:
 +<code bash>
 +make install
 +</​code>​
 +
 +which will place openssl into ''/​usr/​local/​openssl''​.
 +
 +The next step is to compile tor statically:
 +<code bash>
 +./configure --prefix=/​usr ​
 +            --sysconfdir=/​etc ​
 +            --localstatedir=/​var \
 +            --enable-upnp ​ \
 +            --enable-nat-pmp \
 +            --enable-bufferevents \
 +            --enable-static-openssl \
 +            --with-openssl-dir=/​usr/​local/​openssl \
 +            --enable-static-libevent \
 +            --with-libevent-dir=/​usr/​lib/​x86_64-linux-gnu
 +</​code>​
 +
 +In case ''​--enable-static-tor''​ is enabled then ''​tor''​ may bomb out with: ''​configure:​ WARNING: Could not find a linkable openssl.''​ which does not seem to go away.
 +
 +
  

fuss/tor.txt ยท Last modified: 2017/02/22 18:30 (external edit)

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