alert tcp [217.12.221.131,217.156.49.33,217.60.78.198,220.135.36.173,23.128.248.160,23.128.248.161,23.128.248.162,23.128.248.163,23.128.248.164,23.128.248.165] any -> $HOME_NET any (msg:"ET TOR Known Tor Exit Node Traffic group 84"; reference:url,check.torproject.org/torbulkexitlist; threshold:type limit, track by_src, seconds 60, count 1; classtype:misc-attack; flowbits:set,ET.TorIP; sid:2520083; 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;)