alert tcp [104.244.75.74,104.244.76.237,104.244.77.208,107.172.111.164,107.172.125.210,107.175.202.162,107.175.218.6,107.189.1.160,107.189.7.186,107.189.8.181] any -> $HOME_NET any (msg:"ET TOR Known Tor Exit Node Traffic group 4"; reference:url,check.torproject.org/torbulkexitlist; threshold:type limit, track by_src, seconds 60, count 1; classtype:misc-attack; flowbits:set,ET.TorIP; sid:2520003; rev:6435; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag TOR, signature_severity Informational, created_at 2008_12_01, updated_at 2026_11_11;)