alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL RPC mountd TCP unmountall request"; flow:established,to_server; content:"|00 01 86 A5|"; depth:4; offset:16; content:"|00 00 00 04|"; within:4; distance:4; content:"|00 00 00 00|"; depth:4; offset:8; classtype:attempted-recon; sid:2102022; rev:6; metadata:created_at 2010_09_23, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_08;)