alert tcp [$HOME_NET,$HTTP_SERVERS] any -> $EXTERNAL_NET any (msg:"ET POLICY GIOP/IIOP Request Outbound"; flow:established,to_server; flowbits:set,ET.GIOPsession; stream_size:server,<,5; content:"|47 49 4f 50 01|"; startswith; content:"|00|"; distance:2; within:1; classtype:policy-violation; sid:2034730; rev:1; metadata:attack_target Client_and_Server, created_at 2021_12_15, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_15;)