>Have a look at the KarlBridge/KarlBrouter, this can do encrypted VPNs
>(using proprietary software encryptin currently, DES on its way).
>have a look at http://www.karlnet.com/ in the US
> http://www.gbnet.net/kbridge/ in UK/Europe
Don't endorse products myself but have played with Karbridges before and
like the concept. Uses an obsolete 386 PC with dual NICs. Does nothing but
route/filter transparently. And since it does not respond to anything on the
net (you have to program out-of-channel and reboot to change), is immune
to most attacks. Would seem ideal for a situation in which you do not have
adequate control of/in the router.