I'm trying to activate Ccleaner but I need to open rules up on my firewall and I can only open it up to a specific destination. What is the destination URL that Ccleaner goes to during the activation process ?
Maybe some more info is needed such as what firewall software is it, or is it a hardware firewall?
and since you are trying to activate, it must be the Pro version, so don't forget you are paying for priority support directly from Piriform, which may be a faster turn-around then this forum.