Have you tried the DMZ/Public IP Address Page?
Again:
A)Get your PS3 Mac Address from PS3 connection settings list.
B)Connect your PS3 to Thomson router through direct cable and configure your PS3 connection as wired.
**Make sure in Thomson UPNP/Universal Plug and Play is Enabled/Checked
C)Refer to DMZ/Public IP Addresspage that your PS3 MAC Address should become visible there and set it accordingly.
**If you can't see your PS3 IP on that page then i suggest doing a router back up settings then restore default settings then restore backup settings.
doesn't work, i connected my modem to my ps3 via ethernet cable, assigned a static IP, and logged in to my modem's configuration.
On the home network devices tab, i could see that my modem is connected to an unknown device ( PS3 ) went on to the public IP page, i could only see one device to assign a public IP to : the Dir-300 ( which is my wireless router ), that i had disconnected.
unplugged my PS3, connected my laptop via ethernet cable, backed up configuration settings and reset it to factory.
turned off router, and restored configuration, nothing but Dir-300 in the DMZ
and having done that on the ps, going to the DMZ, no devices were found