alert udp $EXTERNAL_NET any -> $HOME_NET 111 (msg:"GPL RPC portmap proxy attempt UDP"; content:"|00 01 86 A0|"; depth:4; offset:12; content:"|00 00 00 05|"; within:4; distance:4; content:"|00 00 00 00|"; depth:4; offset:4; classtype:rpc-portmap-decode; sid:2101923; rev:7; metadata:created_at 2010_09_23, signature_severity Informational, updated_at 2019_07_26;)