On Wed, Jul 21, 2004 at 01:27:17PM +0200, Michael Widerkrantz wrote:
> You might want to consider vtun as well. It's very simple to set up
> and tunnels IP over UDP or TCP at your option. Might be nice for
> firewall piercing.
>
> http://vtun.sourceforge.net/
>
> Runs on most BSDs and GNU/Linux. Windows is not yet supported.

no, please don't use this.

see http://www.cs.auckland.ac.nz/~pgut00.../linux_vpn.txt

"While googling for more CIPE info, I found another Linux
encrypted tunnel package, vtun. Ugh, this makes CIPE look
like a paragon of good crypto design in comparison. Although
the format is undocumented, from a quick look at the source
code it appears that vtun uses Blowfish in ECB mode with
no integrity protection, and as for CIPE no protection
against message insertion or deletion, replay attacks, etc
etc. Eeek!