I just replaced a Linksys router with a Cisco 1811W and it's working well except this one issue. I can not access the webiste that is hosted on a server behind this router from within the LAN when this router is used as the gateway. The website is accessible from outside. I can access the website by going directly to the host server but not via www. Any idea what needs to be done to access the webiste from within the LAN?