You can create FTP sites under IIS so that your users can perform file operations by using FTP clients. One IIS FTP site is normally sufficient for most companies. However, you may need some extra configuration to allow both external and internal users to access this site.
If you are fine with creating two FTP sites, you can create one for internal users and one for external users. The difference would be setting “External IP Address of Firewall” field for the external site.Read More