FTP Data Channel Port Range Grayed Out

Sometimes the Data Channel Port Range in IIS can be grayed out. If the Data Channel Port Range is grayed out, this is because you are trying to change the Data Channel Port Range at a site level in IIS. To change the Data Channel Port Range in IIS, you have to change it at the server level. Click on the server name in IIS and configure it under FTP Firewall Support here.