I'm looking to implement a simple HTTP proxy during certain hours on a Cisco 800 series SOHO router. Basically the idea is during the hours of 11PM until 6AM the proxy will be in effect. If any of the users on the network try to browse during that time they will be prompted with a username and password screen. There only needs to be one username/password which would be stored locally on the router (no RADIUS or TACACS wanted). If the username/password combo is entered during that time frame, the user can browse, otherwise they are denied. During all other hours, everyone can browse. The documentation I've found doesn't seem to give a straight-forward way to implement this. Additionally, I'm not sure how to implement the time-frame--probably directly on the access-list but I'm needing some help getting there.