Here is the setup:
I have a Solaris box running the amanda backup server for all of the Solaris and Linux machines. It can backup all of the machines on the private network just fine, but there is one Redhat Linux 7.3 machine that sites outside of the firewall in a DMZ. Punching a hole in the firewall to allow communication is absolutely not an option, so what I need to know is what would be the safest and most reliable way to create a tunnel from the Redhat box in the DMZ to the Solaris box inside? I have thought of using an SSH tunnel, but I don't know how reliable that is, or how to do this properly without creating a backdoor through the firewall. Any help would be greatly appreciated.