Try to use vpnc instead of Cisco VPN client

Source

svn co http://svn.unix-ag.uni-kl.de/vpnc/trunk vpnc
cd vpnc
make
sudo make install

Support template

pcf2vpnc Support_template.pcf > /etc/vpnc/foobar.conf

Hash password security, eh?

Start connection

sudo /usr/local/sbin/vpnc foobar