alert tcp [23.129.64.172,23.129.64.173,23.129.64.174,23.129.64.175,23.129.64.176,23.129.64.177,23.129.64.178,23.129.64.179,23.129.64.180,23.129.64.181] any -> $HOME_NET any (msg:"ET TOR Known Tor Exit Node Traffic group 78"; reference:url,check.torproject.org/torbulkexitlist; threshold:type limit, track by_src, seconds 60, count 1; classtype:misc-attack; flowbits:set,ET.TorIP; sid:2520077; rev:6266; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag TOR, signature_severity Informational, created_at 2008_12_01, updated_at 2026_05_26;)