vpnc: no response from target - ubuntu linux VPN

As a follow up on the Ubuntu linux VPN tutorial it is worth pointing out one more tip on getting this to work. With newer versions of vpnc, you might get this message when trying to initiate a vpn connection:

vpnc: no response from target

This is simple to fix simply by adding the following line to your vpnc.conf:

NAT Traversal Mode cisco-udp

So your /etc/vpnc/vpnc.conf file should look something like this:

IPSec gateway 217.32.131.20
IPSec ID General
IPSec secret aa@thattosuri22pr*7uv8pespfosic$
Xauth username clacy
NAT Traversal Mode cisco-udp