wiki:doc/TorBrowser/DefaultBridges

Tor Browser's default bridges

Tor Browser ships with a number of default bridges. These bridges are hard-coded in the file bridge_prefs.js. OONI also maintains a file, tor-bridges-ip-port.csv, that contains IP addresses and ports that are scanned as part of the "TCP Connect" test. The following table is meant to be an authoritative list of our default bridges plus the people who operate these bridges. Whenever we add, remove, or change any of our default bridges, make sure to commit this change to both the Tor Browser Build and OONI repository. Also, use the tbb-bridges trac keyword for new tickets related to default bridges.

Type IP:port Fingerprint Parameters Contact URL Status
obfs3 109.105.109.163:38980 1E05F577A0EC0213F971D81BF4D86A9E4E8229ED N/A Linus Nordberg Metrics
obfs3 109.105.109.163:47779 4C331FA9B3D1D6D8FB0D8FBBF0C259C360D97E6A N/A Linus Nordberg Metrics
obfs4 109.105.109.165:10527 8DFCD8FB3285E855F5A55EDDA35696C743ABFC4E cert=Bvg/itxeL4TWKLP6N1MaQzSOC6tcRIBv6q57DYAZc3b2AzuM+/TfB7mqTFEfXILCjEwzVA iat-mode=1 Linus Nordberg Metrics
obfs4 109.105.109.147:13764 BBB28DF0F201E706BE564EFE690FE9577DD8386D cert=KfMQN/tNMFdda61hMgpiMI7pbwU1T+wxjTulYnfw+4sgvG0zSH7N7fwT10BI8MUdAD7iJA iat-mode=2 Linus Nordberg Metrics
obfs4 85.17.30.79:443 FC259A04A328A07FED1413E9FC6526530D9FD87A cert=RutxZlu8BtyP+y0NX7bAVD41+J/qXNhHUrKjFkRSdiBAhIHIQLhKQ2HxESAKZprn/lR3KA iat-mode=0 Tom van der Woerdt Metrics Will go offline on 2019-08-31
obfs4 38.229.1.78:80 C8CBDB2464FC9804A69531437BCF2BE31FDD2EE4 cert=Hmyfd2ev46gGY7NoVxA9ngrPF2zCZtzskRTzoWXbxNkzeVnGFPWmrTtILRyqCTjHR+s9dg iat-mode=1 Team Cymru Mailing list
obfs4 38.229.33.83:80 0BAC39417268B96B9F514E7F63FA6FBA1A788955 cert=VwEFpk9F/UN9JED7XpG1XOjm/O8ZCXK80oPecgWnNDZDv5pdkhq1OpbAH0wNqOT6H6BmRQ iat-mode=1 Team Cymru Mailing list
obfs4 [2001:470:b381:bfff:216:3eff:fe23:d6c3]:443 CDF2E852BF539B82BD10E27E9115A31734E378C2 cert=qUVQ0srL1JI/vO6V6m/24anYXiJD3QP2HgzUKQtQ7GRqqUvs7P+tG43RtAqdhLOALP7DJQ iat-mode=1 David Goulet #22429 Metrics
obfs4 192.95.36.142:443 CDF2E852BF539B82BD10E27E9115A31734E378C2 cert=qUVQ0srL1JI/vO6V6m/24anYXiJD3QP2HgzUKQtQ7GRqqUvs7P+tG43RtAqdhLOALP7DJQ iat-mode=1 David Goulet #22429 Metrics
obfs4 37.218.240.34:40035 88CD36D45A35271963EF82E511C8827A24730913 cert=eGXYfWODcgqIdPJ+rRupg4GGvVGfh25FWaIXZkit206OSngsp7GAIiGIXOJJROMxEqFKJg iat-mode=1 Greenhost #22468 Metrics
obfs4 37.218.245.14:38224 D9A82D2F9C2F65A18407B1D2B764F130847F8B5D cert=bjRaMrr1BRiAW8IE9U5z27fQaYgOhX1UCmOpg2pFpoMvo6ZgQMzLsaTzzQNTlm7hNcb+Sg iat-mode=0 Greenhost #22468 Metrics
obfs4 85.31.186.98:443 011F2599C0E9B27EE74B353155E244813763C3E5 cert=ayq0XzCwhpdysn5o0EyDUbmSOx3X/oTEbzDMvczHOdBJKlvIdHHLJGkZARtT4dcBFArPPg iat-mode=0 Felix #23166 Metrics
obfs4 85.31.186.26:443 91A6354697E6B02A386312F68D82CF86824D3606 cert=PBwr+S8JTVZo6MPdHnkTwXJPILWADLqfMGoVvhZClMq/Urndyd42BwX9YFJHZnBB3H0XCw iat-mode=0 Felix #23166 Metrics
obfs4 216.252.162.21:46089 0DB8799466902192B6C7576D58D4F7F714EC87C1 cert=XPUwcQPxEXExHfJYX58gZXN7mYpos7VNAHbkgERNFg+FCVNzuYo1Wp+uMscl3aR9hO2DRQ iat-mode=0 Noisebridge #24756 Metrics
obfs4 144.217.20.138:80 FB70B257C162BF1038CA669D568D76F5B7F0BABB cert=vYIV5MgrghGQvZPIi1tJwnzorMgqgmlKaB77Y3Z9Q/v94wZBOAXkW+fdx4aSxLVnKO+xNw iat-mode=0 Louis-Philippe Véronneau #28185 Metrics
meek 0.0.2.0:2 97700DFE9F483596DDA6264C4D7DF7641E1E39CE url=https://meek.azureedge.net/ front=ajax.aspnetcdn.com Team Cymru #21342 Metrics
snowflake 0.0.3.0:1 2B280B23E1107BB62ABFC40DDCC8824814F80A72 N/A David Fifield N/A Metrics

Adding new default bridges

The following is an informal list of requirements that we have for default bridges:

  • A reliable network link that can handle a sustained 100 Mbit/s of traffic.
  • The operator should be somebody we know personally.
  • This somebody should also have a sustainable plan for running the bridge, so it doesn't get abandoned soon.
  • The bridge should run on a dedicated machine.
Last modified 9 days ago Last modified on May 16, 2019, 7:52:45 PM