I would however be very interested to hear back from tor-relay operators if any of them have found Challenge ACK counter values higher than a million... which would indicate some kind of funny business.
Thanky you for your work. I know of 3 relays with ACK above 1 million: TCPChallengeACK: 1081146 TCPSYNChallenge: 1062995 TCPChallengeACK: 1270948 TCPSYNChallenge: 1254428 TCPChallengeACK: 1189549 TCPSYNChallenge: 1171422 all running under Linux vm20198 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux There seems to be no relation between uptime of the server and challenges apart from rebooting, which resets to 0. What about relays not on the list at all? I would assume that not everybody of that 23 percent does know what exactly to do, apart from better running on BSD - could you please give detailed recommendation for beginners - your discussion seems on a high level :-) Thanks and regards Paul