How can I block traffic based on port or protocol in GTP (GPRS Tunneling Protocol) ?

Hello
We use the Forticarrier license in VM08 to inspect GTP traffic and to place necessary restrictions. We want to block protocols such as Ping, SSH in GTP. Can you help us with this?

I also want to filter SCTP messages in GTP and block some of them. I can write sctp message filter and give the ppid value and block it, but this is not what I want. I want to catch the payload in SCTP and block it if it exceeds the hit count. How can I do this?

Thanks in advance