S is packets sent
R is packets received

As the PS2 has no malware that can infect it over the internet, best thing to do is assign it a static IP address and then put that IP address in the DMZ of your router. The DMZ device is not affected by the firewall at all.

You define your IP address before logging in to PlayOnline Viewer. You need to give it one that your router doesn't assign via DHCP, so you need to find the range in your router settings. Example, my router assigns the last digit in the address to be starting at address 10, and can hand out 50, meaning 192.168.0.10 through 192.168.0.59 are handed out by the router. That leaves final numbers of 2-9 (1 is used by the router) and 60-254 available for me to assign as static device addresses. A static address is much easier to grant firewall port exemptions, because the address won't change after a reboot and lease expiration.