alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL RPC mountd TCP export request"; flow:to_server,established; content:"|00 01 86 A5|"; depth:4; offset:16; content:"|00 00 00 05|"; within:4; distance:4; content:"|00 00 00 00|"; depth:4; offset:8; reference:arachnids,26; classtype:attempted-recon; sid:2100574; rev:9; metadata:created_at 2010_09_23, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)