I am connecting to a new ISP using dhcp and dns servers provided by my isp. The dns server ips are 192.168.1.5 and 192.168.1.6 which work fine when connected directly to my cable modem, but do not work when connected to the router. They are unpingable. Anyone any ideas? It seems strange that an isp would use internal network addresses. I determined the dns server ips from ipconfig /all on my vista machine and looking in /etc/resolv.conf on my mac.