On Wed, Mar 28, 2018 at 10:57:13AM -0400, Rob Jansen wrote: > In a recent connectivity test to the default obfs4 bridges [0], we found that > we are unable to connect to 10 or so of them (from open networks, i.e., no > local filtering). > > Is this a feature, like some of them only respond to users in certain parts > of the world? Or is this a bug, like the default list of bridges refers to > old bridges that are no longer available? Or am I misunderstanding > functionality here?
Do you mean 10 distinct IP addresses, or 10 ports on a few IP addresses? Not all the IP addresses in the list are distinct. Even while Lynn Tsai, Qi Zhong, and I were closely monitoring default bridge reachability, a lot of the default bridges were often offline, because of reboots, iptables problems, etc. See for example the "Orbot bridges" strip of Figure 5.2 here; the gray and red areas that precede blocking are where the bridge was simply offline: https://www.bamsoftware.com/papers/thesis/fifield-thesis.pdf#page=43 We have a lot of past measurements of default bridges. The rows with site="eecs-login" are from the U.S. https://www.bamsoftware.com/proxy-probe/ (download the repo, not probe.csv.gz, which isn't as recent) _______________________________________________ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
