Windows 2003 Server Running Plesk now experiencing passive FTP issues 425 can't open data connection
FTP users are now getting 425 errors when using passive FTP (active seems to be working fine). These errors started occurring recently. We did make one firewall change recently to explicitly block UDP request on port 0, but that shouldn't have caused this (I even disabled that rule and tested to be certain it wasn't the problem).
Perhaps one of the recent Windows Updates changed something that caused passive FTP to stop working?