On Mon, Nov 21, 2005 at 01:52:27PM +0000, Martijn van Buul wrote:
> Martijn - who expects the answer to be "You can't, don't bother with stf", but
>           nothing ventured, nothing gained...
> 

FWIW, an Internet Draft, "Teredo: Tunneling IPv6 over UDP through
NATs," by Christian Huitema, describes a protocol that may apply in your
situation.  There are open-source implementations for the FreeBSD kernel
(teredo_ng) and Linux/*BSD userland (Miredo).

[It would be nice if NetBSD had a virtual interface teredo(4) in addition
to stf(4).]

Dave

-- 
David Young             OJC Technologies
dyoung@ojctech.com      Urbana, IL * (217) 278-3933