[c-nsp] Linux VPN client suggestion?

[Kevin Graham]

> Have had good luck with VPNC on Linux.  You can try the ShrewSoft Linux
> client (http://www.shrew.net/) as well if you're of a mind, but vpnc
> tends to win on simplicity.

Out of curiosity, how much actual functionality of the Unity/AnyConnect/etc
VPN software are any of you using? L2TP+IPSec is a pretty straightforward
config (even w/ VRF-lite) and is doable w/ just a ADVSECURITY license.

Most Linux distros, Windows (going back to at least XP), OS X, Windows
Mobile (to at least 5) and the iPhone all support it out of the box..
RFC3948 support is also very common, allowing easy NAT traversal.