Batch File-Logon To Tripwire Server through a DMZ

Dear All,
I'm using WIN and UNIX Tripwire Servers-SSH.
Between Tripwire and my machine there?s a DMZ (Doh!...that's the way it goes).
The scenario is to create a Client Script that:
- Provide a Password and User ID
- Connect to SSH Server (WIN or UNIX) - DMZ in the way
- Collect the Log Files from the Tripwire Server (UNIX or WIN)
- Drop it on my machine.
- Schedule will be every 30 minutes/or once a day.
- The Log File Location (Source and Destination) will be in this scrip if possible as well.
I?ll be grateful if one of you can help me, or at least give ma an idea to start.
Best regards,