I am trying to set up an office to connect to my network through a VPN connection. I have everything set up with ISA and my firewall, but when I try to connect from their network, I get an error when the authentication comes up. I know the username and password/domain info is correct, what I am assuming is that their firewall is blocking the response from my firewall. If anyone knows what ports I need to tell them to open so that the connection can complete, I would appreciate the info. If it is in Tom's book, could you point me to the right chapter/page. I have looked but haven't found what I need yet. Thank you, Michael Anderson, MCSE Network Administrator Bonneville County