PS3 - MGS4 keeps disconnecting?

[British_Command]

I keep getting disconnected on MGS4 on PS3? My xbox 360 is fine, I tried putting the port in on router page as well as having Upnp enabled!?

 

[SongLive]

What is your nat type ? NAT Type 2 or Nat type 3 ? You can see it on your PS3 when running a network check in the network menu.
You might need to open some ports or enable UPNP also in your router (not only on ps3)