Not Worked with Vood 453. But the basic idea in port forwarding is
1. Assign the device (PlayStation) a static IP address.
2. From the configuration screen for your router using the port forwarding section.
3. Assign the concerned port to be forwarded to the playstation.
4. Reboot your router.

For PS2 the basic ports are TCP: 53, 80, 443
and different games use different ports which must be included.

For more info check this link where the idea is explained for another router type
http://www.jlsnet.co.uk/index.php?page=cc_playstation2

HTH