vpnc Connects Linux and Cisco VPNs

“Now that the configuration file exists, you can simply run sudo
vpnc enp.conf (or leave off the .conf). You will now be connected
to the VPN. If everything worked, and you will notice a new ‘tun’
interface in the ‘ifconfig’ output.

“To disconnect from the VPN, simply run sudo vpnc-disconnect

“Do note that the default route gets replaced with the VPN
router (so all traffic goes through the VPN) when you are
connected. See the vpnc man page for help changing this behavior,
or simply remember to disconnect from the VPN when you are
done.”

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