alert tcp $HOME_NET any -> $EXTERNAL_NET 6666:7000 (msg:"GPL CHAT IRC DCC chat request"; flow:to_server,established; content:"PRIVMSG "; depth:8; nocase; content:" |3A|.DCC CHAT chat"; nocase; flowbits:set,is_proto_irc; classtype:policy-violation; sid:2101640; rev:10; metadata:created_at 2010_09_23, signature_severity Informational, updated_at 2019_07_26;)