Cisco VPN client password decrypt

By Jorn van Engelen on Sunday, June 6, 2010.

I used cisco-decrypt to decrypt my Cisco VPN group password on Windows so I could use the Eindhoven University of Technology (TU/e) VPN in Ubuntu.

Tested on Linux Mint 10.


How to get the password from Windows

Configure vpnc for TU/e VPN


Connection name: TU/e VPN
Connect automatically off


Group name: des
User password -> Saved
User password: TU/e password
Group password -> Saved
Group password: (use cisco-decrypt, see above)
User name: TU/e s-number
Encryption method: Weak (use with caution)
NAT traversal: NAT-T when available (default)

IPv4 Settings

Method: Automatic (DHCP)