Is anyone familiar with this subject? When I search the web, I find only general information. For example, that the firewall must open a port for SQL and that 1433 is the SQL Server default. And that the ADO connection string should reference the server's IP and the appropriate net library. However, I still haven't succeeded with those instructions. <BR><BR>I'd like to understand the mechanics of what happens after IIS interprets the vbscript ADO and knows it should connect with a certain SQL Server. For example, does IIS somehow know by default to look to the firewall, or must the firewall IP be explicitly stated in the ASP / ADO code somewhere? And same for the firewall port number? And what specific steps are involved with "opening a port" in the firewall?<BR><BR>If anyone has the answers or knows where I can find them, much appreciated. We're running IIS 4.0 with MDAC 2.1 (old, I know) on the web server, and SQL 2K + NT4 on the database side.