Setting up Secured FTP (FTPS) on z/OS
1. Open FileZilla.
2. Click on File > Site Manager.
3. Click on New site.
4. Enter a session name.
5. On the General tab select the following:
Protocol: FTP – File Transfer Protocol
Host:
Your personal hostname
Encryption: Require explicit FTP over TLS
Logon Type: Ask for password
6. On the Advanced tab:

Set the
Server type: MVS, OS/390, z/OS.

Set a path under
Default local directory.

Enter a path under
Default remote directory.
7. Click on Connect.
8. Enter your userID and you mainframe password.
9. Click OK.
You will be presented with a server certificate overview window. Click OK and your session is now established.