Fairly simple configuration, Westell DSL modem, and Cisco 1811W integrated services router configured with BVI interface and Dialer0 interface for DSL connection.
As of last night, did some DSL modem troubleshooting (changed DSL modem from "router" mode to "bridged ethernet" mode), and now client can browse any web site on the internet EXCEPT for Yahoo, and their web site hosted by Yahoo.
On the client PC I can telnet to Port 80 on Yahoo.com and get a connection, and in Internet Explorer, for a split second, displays the page title in the title bar of the browser, then suddenly stops and displays "Cannot find server or DNS error".
This makes absolutely no sense to me. Suggestions? Urgent. :(