alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL ICMP_INFO PING BayRS Router"; itype:8; content:"|01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F|"; depth:32; reference:arachnids,438; reference:arachnids,444; classtype:misc-activity; sid:2100369; rev:7; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)