[KLUG Members] IPtables tunneling

[John Pesce]

I'm sorta new to firewalls. I have IPTables up and running ok with all 
out going connections allowed with masquerading. This firewall is 
protecting a university campus lab, so we are behind the campus firewalls.

The problem is that the upper management wants to loan out the use of a 
flexlm license to a rather expensive piece of software to a few computers 
in another building. The flexlm server is obviously behind our firewall.

What would be the easiest/safest way to do this? Some terms like VPN and 
tunneling come to mind,  but I'm not familiar with them. 
I guess the safest, and most expensive way would be to run Cat5 from our 
lab to the other building :)

What about things like VPN or WAN?

Tunneling sounds the easiest, i guess I would somehow tell IPTables to 
forward the flexlm packets to the flexlm server?? 

Any ideas, examples?

Thanks!