Ok guys. I have this complicated setup. Internet --> cable modem---> wireless router ---> RTP VOIP router ---> eth0 of my dell poweredge 1850 server. I disabled the dhcp of bother routers and configure my server to handle the dhcp. I tried to configure the server to handle the DNS but I wasnt sure if I did the configuration right. I used webmin to do this.. so if you know how to configure DNS with webmin, please help. Now, I want to configure the second ethernet card (eth1) to work for LAN only. So based on the diagram I showed above where shoud I plug in my switch? Will a cable go from the eth1 to the switch and then another cable from the switch to which router? if anyone can help with this complex matter, please I will appreciate it.