The Symantec Web Gateway FTP proxy does support FTPS, but these are the only available options:
- Use Explicit Passive FTPS - requires you opening all high ports on your firewall. Works over both SOCKS and HTTP CONNECT methods and requires one of them to be used.
- Use Implicit Passive FTPS - requires you opening port 990 and high ports on your firewall.
- Use Implicit Active FTPS - requires you opening ports 990 and 989 on your firewall.
- Bypass proxy and go direct to the server picking any of the above 3 options to open ports on your firewall. In this scenario there is also the additional option of Explicit Active FTPS available.