alert udp $EXTERNAL_NET any -> $HOME_NET 5060 (msg:"ET SCAN Smap VOIP Device Scan"; content:"<sip|3a|smap@"; offset:80; depth:40; reference:url,www.go2linux.org/smap-find-voip-enabled-devices; classtype:attempted-recon; sid:2008526; rev:5; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)