alert tcp [23.129.64.141,23.129.64.142,23.129.64.143,23.129.64.144,23.129.64.145,23.129.64.146,23.129.64.147,23.129.64.148,23.129.64.149,23.129.64.150] any -> $HOME_NET any (msg:"ET TOR Known Tor Exit Node Traffic group 87"; reference:url,check.torproject.org/torbulkexitlist; threshold:type limit, track by_src, seconds 60, count 1; classtype:misc-attack; flowbits:set,ET.TorIP; sid:2520086; rev:6316; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag TOR, signature_severity Informational, created_at 2008_12_01, updated_at 2026_07_15;)