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[tor-relays] SYN flooding on port 80. - how often does this ppear at exits usually ?
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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
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