1. Getting ready to compile the code

    sudo apt-get install build-essential linux-headers-`uname -r`
    
  2. Get the lastest version from cisco and untar

    tar zxvf vpnclient-linux-x86_64-4.8.00.0490-k9.tar.gz
    
  3. Make (inside the vpnclient dir)

    make
    
  4. install vpn client

    sudo ./vpn_install
    
  5. Create a VPN profile with info like Host, authentication method…

    sudo pico /etc/opt/cisco-vpnclient/Profiles/sample.pcf
    
  6. Start the VPN Service

    sudo /etc/init.d/vpnclient_init start
    
  7. Import a given root certificate

    sudo cisco_cert_mgr -R -op import -f root.cer
    
  8. Import a given user certificate

    sudo cisco_cert_mgr -U -op import -f user.cer
    
  9. Establish a connection

    sudo vpnclient connect profile
    

Useful Links: popey.com/node/62