I have a linksys router that gets it dns server names and a dhcp address from my ISP. The name servers cannot be changed when you login to the Linksys router.

I have 2 Linux boxes and 1 Windoze box behined the router each given static 192.168.x.x addresses.

The 1 Linux box and 1 Windoze box each have the same dns addresses as the router does, added in manually. These machines can load pages, ping, traceroute etc etc.

The other Linux machine uses dns numbers given to me when I login to easydns. They are added in to resolve.conf. This machine can ping google but not yahoo or any other domain that does not have icmp blocked. Also when running a traceroute google the trace stops on the 18th hop and then I see astricks.

Is there a problem with using other dns addresses behind a router that grabs address from it's provider?