I have just spent the afternoon trying to get my head around this one and failed. A customer has been set up with a new ADSL account with the following IP addresses: 88.x.a.116/30 (routed IP range) 88.x.b.170 (static IP). I need to configure the router to everything to a firewall that'll route traffic accordingly. I can't even work out from this configuration how many usable external IP addresses this will give them? (I can get the router connected with the static IP in a normal configuration without problem.) PS: God bless my Ubuntu Live CD, the tools you have to manage without on Windows! -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG