alert tcp any any -> any 6666:7000 (msg:"ET CHAT IRC PONG response"; flow:from_client,established; content:"PONG|20|"; depth:5; flowbits:set,is_proto_irc; classtype:misc-activity; sid:2002028; rev:20; metadata:created_at 2010_07_30, signature_severity Informational, updated_at 2020_08_19;)