I'm getting ready to set up a remote site here at work, and we need to
build a VPN or tunnel (preferably able to carry IPX as well as IP
traffic) between our two networks. We currently use a NetBSD 1.4.3
machine here to provide NAT & gateway service here at the main office,
and will be setting up a NetBSD 1.5 machine at the new office (and
upgrading the one here to 1.5 as well).

Here's the current layout:

Corporate Office:
Public Interface: IP Address 9.9.9.40 /29 - default 9.9.9.46 (DSL
Router).
Private Interface: IP Address 192.168.0.1 /24
IPF & NAT set up & working. Cisco Router at 192.168.0.250 routes to
branch networks 192.168.x.0 /24, where x is the branch number. Branches
hooked up via Frame Relay.This all works fine.

New Branch:
Too small to pay for Frame Relay, but hooking into host site's existing
IP network.
Public Interface: IP Address 8.8.8.37 /24
Private Inteface: IP Address 192.168.12.1 /24 (12=branch number)
IPF & NAT set up & working.

I need to build a tunnel allowing packets to be sent from 192.168.12.x
to 192.168.x.x and back and forth etc. Also, if possible, the tunnel
should accept IPX traffic, but that can be sacrificed if need be.

Am I going to need to use package VTUN to do this, or does NetBSD have a
way built-in to do this?

Thanks much!
 -J. Buck Caldwell, R.U.N. (Relative Unix Newbie)