Its a good router, i like being able to change the router mac address, like you can on yours, so after a change and a reset you have a new IP address.
It says: To restrict Internet access to a single computer for example, enter the IP address of the computer you wish to restrict access to in the IP fields (1). Next, enter “80” in both the port fields (2). Select “Both” (3). Select “Block” (4). You can also select “Always” to block access all of the time. Select the day to start on top (5), the time to start on top (6), the day to end on the bottom (7), and the time to stop (8) on the bottom. Select “Enable” (9). Click “Apply Changes”. The computer at the IP address you specified will now be blocked from Internet access at the times you specified. Note: Be sure you have selected the correct time zone under “Utilities> System Settings> Time Zone”.
so change you ps3 ip to
gateway 192.168.2.50 ( same as ps3)
So rather than putting port 80 like it says above put start port 1 and end port 65534, locking all ports out and then pointing to your ps3 ip address.
If you wish port 21 open, remove the old range and add 2 more ranges.
start 1 end 20
start 22 end 65534 and that will leave port 21 open for ftp.
Very important block port 1900. Its the media port that uses pnp, to connect to media servers both ways, so you don't want that on you wan.