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Packet Port Number Changes on Playstation Network

I am trying to get a Playstation 4 console which sit behind the TZ670 firewall to be properly recognized by the Playstation network (PSN). The console has a static IP of 192.168.1.70. My problem is that when I look at the packet trace is that the destination port of 3478 is changed by the PSN server to a source address of 3479. This means that when the packet is received by the firewall it will be dropped since it doesn't have the original 3478 port number, which is exactly what it should do. The dropped pack indicates a drop code of 742, yet when I look it up it is "Packet dropped - TCP option (MSS) not allowed in non-SYN segment".

I have tried to use specific NAT rules but nothing seems to work, including turning off the "Source Port Remap" option.

I have attached an image of the packet trace, the access rules and service groups used.

If anyone out there has any clue on how to solve this issue it would greatly appreciated.

Category: Entry Level Firewalls
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