From the Windows 2003 Help File: "To use Remote Assistance through a firewall Remote Assistance uses the Remote Desktop Protocol (RDP) to establish a connection between a user requesting help and an assistant providing it. The RDP uses TCP port 3389 for this connection. To allow users within an organization to request help outside your organization using Remote Assistance, port 3389 must be open at the firewall. To prohibit users from requesting help outside the organization, this port should be closed at the firewall." ...where is that dreaded Open Port[Patent Pending] button?... Thomas W Shinder www.isaserver.org/shinder <http://www.isaserver.org/shinder> <http://www.microsoft.com/isaserver/beta/default.asp> ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server: http://tinyurl.com/1llp <http://tinyurl.com/1llp>