Am running a Cisco 871 Ethernet Access Router. Recently used SDM to configure a simple firewall. The firewall was totally configured by SDM and using only SDM defaults. The security level is set to high. Since the firewall was installed, the hosts on the LAN have trouble accessing lower level pages on websites, ie; can log on to a website, can receive the home page, but have trouble accessing a sub-page of the website by clicking on a url button on the web page. The page is initially sent to the host and then deleted with a "cannot connect the page" error. This occurs on all the hosts on the LAN. This is quite obviously a Firewall problem but I don't know what it is. Can someone enlighten me?