alert tcp $EXTERNAL_NET any -> $HOME_NET 111 (msg:"GPL RPC portmap listing TCP 111"; flow:to_server,established; content:"|00 01 86 A0|"; depth:4; offset:16; content:"|00 00 00 04|"; within:4; distance:4; content:"|00 00 00 00|"; depth:4; offset:8; reference:arachnids,428; classtype:rpc-portmap-decode; sid:2100598; rev:13; metadata:created_at 2010_09_23, signature_severity Informational, updated_at 2019_07_26;)