Advanced (non-standard) FW systems perform advanced traffic testing and prevent application level access to non-standard communication.

This means that the FW does not recognize the traffic and links it to an app that it knows and therefore blocks it from an application module.

Note: (If you do not have an application module, it will not be blocked). Anyone who has IPS and Application Control has their attitude.

Therefore, it should be clarified that this is a non-standard communication that FWs running running Application Control & IPS modules will block this communication.