alert tcp [172.104.186.73,172.105.20.12,172.232.209.254,172.232.219.78,172.234.228.174,172.234.92.148,172.81.132.94,172.81.177.173,172.86.117.246,172.86.91.90] any -> $HOME_NET any (msg:"ET TOR Known Tor Exit Node Traffic group 24"; reference:url,check.torproject.org/torbulkexitlist; threshold:type limit, track by_src, seconds 60, count 1; classtype:misc-attack; flowbits:set,ET.TorIP; sid:2520023; rev:6364; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag TOR, signature_severity Informational, created_at 2008_12_01, updated_at 2026_09_01;)