I have a web server running Windows 2003 that allows some users to transfer files via FTP to the server. This server has been configured this way and running just fine for over a year. Two days ago, I installed SP1 on the server, and all of a sudden getting complaints from users that they couldn't connect to their FTP sites. After much troubleshooting, I found out that the server had disabled any passive FTP connections. If the user connects via an active connetion, it works fine, but all passive connections (which most all clients use) will not allow a connection (it will just hang). I do have a firewall in place in front of the server that was configured properly before to handle FTP connections, so unless SP1 simply changes the allowed ports and I need to reconfigure my firewall, then the problem is with the service pack. Please don't tell me to only allow active connections because I have a business need to allow passive connections for my clients. Any suggestions on how I can reinable passive connection capabilities?