Sometimes the system seems set up for failure. An acquaintance who is the IT specialist for a banking division in Canada got the cable high-speed service. He set up the same firewalls that he uses at work. He got a call the next day from his service provider who asked if there was a problem with his service. Apparently they ping your computer regularly to ensure that you are only runnung one computer not a network. They couldn't ping successfully because of his firewall and demanded he remove it. He asked them if they were assuming full responsibility for his system's security against hackers and were willing to insure the integrity of his data and system. What a surprise; they said no! He said he was not removing his firewall, informed them of his IT credentials and asked if they wanted to become the laughing-stock of the on-line community. They chose to leave him alone.