Please excuse what may be a silly question, but I'm currently setting up a DrayTek 2830 Router/Firewall for our small independent charity school, I have limited knowledge of setting up firewalls etc so I may be missing something really obvious . . . . I have all the CSM filters checked that I wished to be blocked, but we occasionally get a blockage of a site I know to be safe or that we need access to within the school. I don't want to turn off the filter, but am trying to create a rule for a safe site that the firewall will pass..... is this possible?