I don't know.
I installed this router for my 21CN upgrade, and it defaulted to DCHP for my PC. I never used DHCP on my last setup, preferring to set the NAT addressing myself.
My PC's IP addy is 192.168.x.x along with the DHCP, however my default gateway is 195.166.x.x (which bears no relation to my external IP addy). I presume there's bridging going on, but my old setup was very simple, and frankly I don't want to fiddle for little gain.