alert tcp [23.129.64.178,23.129.64.179,23.129.64.180,23.129.64.181,23.129.64.182,23.129.64.183,23.129.64.184,23.129.64.185,23.129.64.186,23.129.64.187] any -> $HOME_NET any (msg:"ET TOR Known Tor Exit Node Traffic group 81"; reference:url,check.torproject.org/torbulkexitlist; classtype:misc-attack; sid:2520080; rev:6407; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag TOR, signature_severity Informational, created_at 2008_12_01, updated_at 2026_10_14;)