I have a Zyxel DSL router/firewall that is working without issue but I am unable to access the configuration interface any longer i.e. when I open a browser and type in http://the
ip address of the router I get a 'page cannot be displayed' error. I can ping the router and all rules are working e.g. mail delivery, remote access etc. I was trying to figure out an issue recently and changed a setting on the interface, I can't remember what it was, and since then this problem has occurred and I now need to make some config changes. Any suggestions?