Ssh tunnel mode on Leopard does not work

Hi folks,
I have set up ssh tunnel mode (tunnels opened with "ssh -w 0:0 ..." makes SSH create the necessary tunX interfaces on its own) from my linux boxes to certain servers, and it works well.
But using "ssh -w 0:0" on Leopard client leads to
debug1: systunopen: /dev/tun0 open failed: No such file or directory<<</div>
So it seems - although the ssh man page describes it thus - that creating tun interfaces on Leopard does not work.
By the way, omitting the interface numbers for the tun interfaces on both sides ("ssh -w" instead of "ssh -w 0:0") leads to "Bad tun device" although that as well is documented in the ssh man page as working (and on linux it does).
Has anybody ever tried this on MacOS X in general and Leopard in particular?

Dirk,
I have run into the same issue, however I had ssh tunnels running between several macs before Dec 7 2008. But for some reason it broke on that day. Have been running remote rsync backups of the User data. Can give you the syntax if you want. But my point is it looks like this is a break in the OSX Unix system vs them just not being there as this was working prior to the 7th for several months.
Am working with Apple to get this resolved but in the mean time where did you find the tun/tap drivers? I have some for Open VPN that I have been playing with on another machine but dunno if they will work or not.

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