I keep getting a message: "HTTP Error 403.6 -- Forbidden: IP address of the client has been rejected. Internet Information Services (IIS)." PBK Supplies
Someone is using Microsoft's IIS web server software -- probably an-out-of date version -- and blocking access to some IP addresses. You probably don't have a blocked address. However, every time someone hits the website, IIS has to do a reverse DNS lookup on the address. If it can't handle the DNS, or the lookup fails for some reason, then obviously it must reject you. See Microsoft Knowledge Base article 227943 for details. Try not to take it personally.
