[plug] securely tunneling UDP traffic

[Craig Ringer]

> You haven't mentioned what distribution you're using,

Debian.

> I'm sure packages are available for all the other major distros.

Amazingly, an apt-cache search cipe turns up nothing of relevance.

> Configuring it is very simple - each side of the tunnel has a shared 
> 128-bit key and the endpoint information. The tunnel comes up as a 
> network interface (cipcb<xx>) so you can set up routes and filtering as 
> normal.

Hmm... presumably this needs some kernel support.

I'll look into it; thanks for the tip.