John R Pierce wrote: > I don't actually think my motives are relevant. >> In case I didn't described the situation clearly, >> my CentOS server is connected to an ADSL modem by ethernet (eth0). >> The modem's IP address is 192.168.1.254 . > > your goal is very relevant if youj are expecting us to suggest a > workable solution. My point was that you suggested various alternatives to what I was aiming at. There is a perfectly simple "solution", which is actually what I am doing now, namely to attach the router to the modem. But as I said, I am hoping for a solution where all data will pass through my server. > but ouch, sounds like your modem is ALSO a NAT router, and is probably > running DHCP already. what IP is eth0 of this linux PC ? The server currently has IP address 192.168.1.2, and the modem has IP address 192.168.1.254. > assuming I'm right, and your modem is in fact doing NAT routing too, > then I'd put DD-WRT or Tomato opensource firmware on the WRT54GL, > configure it for LAN only use, so all 5 ports are LAN, plug it into the > modem, plug your computer(s) into the WRT's switch also, and configure > the WRT"s wireless. now all your systems will be on that 192.168.1.xxx > subnet. Can one actually have two NICs on a computer in the same LAN? I would have thought that would cause problems? -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland