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I just changed tor bridge type from obfs3 to obfs4. What's the meaning of the bold sentence? BTW, Tor connection is fine. (Win7 user)

2016-01-18 7:26:51.800 [NOTICE] new bridge descriptor 'xxxxx' (fresh): $xxxxxxxxxxxxxxxxxxxxx~xxxx at xxx.xxx.xxx.xxx

2016-01-18 7:26:51.800 [NOTICE] I learned some more directory information, but not enough to build a circuit: We have no usable consensus.

2016-01-18 7:26:56.200 [NOTICE] Bootstrapped 80%: Connecting to the Tor network

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It is just normal. It means Tor client did not finish fetching consensus, and as soon as it finishes, it starts to build circuits.

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The thing is, that when you're changing bridge type, the Tor node needs to re-announce itself. Try to play with theese options, see details in manual :

  • ExtORPort - it helps to use pluggable transports explicitly
  • ConnLimit and your OS fd limit, in Linux it's ulimit -n output. The more connections you can make - the more connectivity you will have
  • IPv6/IPv4 coexistance : sometimes if you're using IPv4 to reach an outer internet, you need to completely disable IPv6 on sysctl level and when compiling libraries. The core of the problem is that some dual-homed hosts are resolved/mapped to IPv6 and the software stack tries to use it. If you have only IPv4 address - try to disable the IPv6 completely : somtimes it speeds up twice

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