More attack traffic against Tor detected on exit relay
IPTables rule involved: -A INPUT -p tcp -m string --hex-string "|00002800390038008800870035008400160013000a00330032009a009900450044002f00960041000500ff020100000400230000|" --algo kmp -j LOG --log-prefix "IPTables-GFC-new " -A INPUT -p tcp -m string --hex-string "|00002800390038008800870035008400160013000a00330032009a009900450044002f00960041000500ff020100000400230000|" --algo kmp -j DROP Logs generated Wednesday from hits against these rules: Jul 30 13:44:38 Libero2-vserver kernel: IPTables-GFC-new IN=eth0 OUT= MAC=00:16:3e:21:6d:34:00:21:d8:25:c0:20:08:00 SRC=1.50.250.198 DST=64.113.44.206 LEN=147 TOS=0x08 PREC=0x20 TTL=44 ID=21838 DF PROTO=TCP SPT=13717 DPT=9001 WINDOW=46 RES=0x00 ACK PSH FIN URGP=0 Jul 30 13:44:59 Libero2-vserver kernel: IPTables-GFC-new IN=eth0 OUT= MAC=00:16:3e:21:6d:34:00:21:d8:25:c0:20:08:00 SRC=175.152.3.46 DST=64.113.44.206 LEN=147 TOS=0x00 PREC=0x00 TTL=50 ID=21839 DF PROTO=TCP SPT=49229 DPT=9001 WINDOW=46 RES=0x00 ACK PSH FIN URGP=0 Jul 30 13:45:41 Libero2-vserver kernel: IPTables-GFC-new IN=eth0 OUT= MAC=00:16:3e:21:6d:34:00:21:d8:25:c0:20:08:00 SRC=124.90.49.99 DST=64.113.44.206 LEN=147 TOS=0x00 PREC=0x00 TTL=49 ID=21840 DF PROTO=TCP SPT=10200 DPT=9001 WINDOW=46 RES=0x00 ACK PSH FIN URGP=0
On Fri, Aug 01, 2014 at 01:42:32PM -0400, tor@t-3.net wrote:
You probably found these iptables rules in a blog post [0]. Note that this is not "attack" traffic. Most likely, these are automated probes from China whose purpose is to verify that your Tor relay is, in fact, a Tor relay and it's safe to block it. [0] https://idea.popcount.org/2013-07-11-fun-with-the-great-firewall/ Cheers, Philipp
participants (2)
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Philipp Winter -
tor＠t-3.net