alert tcp $EXTERNAL_NET any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET POLICY Successful LDAPSv3 LDAPS_START_TLS Request Outbound"; flow:established,to_client; flowbits:isset,ET.LDAPSBindRequest; stream_size:server,<,50; dsize:14; content:"|30 0c 02 01|"; startswith; content:"|78 07 0a 01 00 04 00 04 00|"; endswith; fast_pattern; reference:url,ldap.com/ldapv3-wire-protocol-reference-extended/; classtype:policy-violation; sid:2034721; rev:2; metadata:attack_target Client_and_Server, created_at 2021_12_14, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_15;)