This problem is really wierd. We have a client who just moved. They moved to another suite in the same bldg. The ISP is also the dial tone provider. They did change equipment when they went from one suite to the other. Now that they are moved and everything is settled down they complain that yahoo.com is very slow. I went in and looked to find out that finance.yahoo.com is very slow if it comes up at all. I then tried travel.yahoo.com and sports.yahoo.com. The client has two companies inside one suite. Both have dedicated servers for their own companies running Windows Server, DNS and exchange.
I guess it could be the router but the router tech support (zyxel) says it is not them. The ISP says it is not them. The ISP told me to look at EDNS to see if that could be the problem with the 2003 box. Any suggestions as I am stuck on this one.