-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Recently I realized these log messages tor-relay ~ # zgrep SYN /var/log/kern* /var/log/kern.log:Oct 11 13:43:47 tor-relay kernel: [132045.057945] TCP: request_sock_TCP: Possible SYN flooding on port 80. Sending cookies. Check SNMP counters. /var/log/kern.log-20150927.gz:Sep 22 08:05:43 tor-relay kernel: [47670.548282] TCP: request_sock_TCP: Possible SYN flooding on port 80. Sending cookies. Check SNMP counters. /var/log/kern.log-20151005.gz:Sep 28 11:06:32 tor-relay kernel: [576607.272239] TCP: request_sock_TCP: Possible SYN flooding on port 80. Sending cookies. Check SNMP counters. /var/log/kern.log-20151005.gz:Oct 2 08:04:21 tor-relay kernel: [911078.601891] TCP: request_sock_TCP: Possible SYN flooding on port 80. Sending cookies. Check SNMP counters. /var/log/kern.log-20151011.gz:Oct 8 11:35:23 tor-relay kernel: [1441827.102566] TCP: request_sock_TCP: Possible SYN flooding on port 80. Sending cookies. Check SNMP counters. and do just wonder how often this is expected to appear in the mean a tor server and if there's something special to do in this case ? - -- Toralf, pgp key: 872AE508 0076E94E -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iF4EAREIAAYFAlYbvOYACgkQxOrN3gB26U5VOwD/RNq50pluX2afABKTGmNwPQhH qxMGSdL+F1aB1Lf82WEA/j6W9U5QHybtseNlNDKcDmdAG4RlAwDMs6x2Fh4cjErE =dHy8 -----END PGP SIGNATURE-----