Is there a linux firewall I can install such that I can block certain web sites for specific times of the day? Currently I can do something like this using the firewall on my router, but I cannot selectively apply the rules to individual websites so if I block access from say 3pm -6pm, it applies to all the domains I listed in the firewall. I would like to say block access to www.site1.com from 12 - 2pm and block access to www.site2.com from 8 - 5pm and completely block access to www.site3.com.
Thanks for your help.