alert udp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL DELETED mountd UDP unmountall request"; content:"|00 01 86 A5|"; depth:4; offset:12; content:"|00 00 00 04|"; within:4; distance:4; content:"|00 00 00 00|"; depth:4; offset:4; classtype:attempted-recon; sid:2102023; rev:5; metadata:created_at 2010_09_23, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)