Not all traffic can be supported by standardized protocol specifications. There are cases that require a different means of identifying an attack based on packet grepping. Trellix IPS has a pre-defined list of packet grep protocols. You can view this list of protocols in the Packet Grep interface. Using this interface, you can also create packet grep protocol in case the one that you need is not in the list of Trellix IPS-defined packet grep protocols.
To access the Packet Grep protocol interface in the Custom Attack Editor, select Other Actions → Manage Grepping Protocols.