De gacq wiki
vpnc: quick mode response rejected: ISAKMP_N_INVALID_PAYLOAD_TYPE(1) this means the concentrator did not like what we had to offer.
Did not work trying with Cisco VPN Client
Cisco VPN Client (Propietary)
tar zxf vpnclient-linux-x86_64-4.8.00.0490-k9.tar.gz cd vpnclient ./vpn_install /etc/init.d/vpnclient_init start
cd /etc/CiscoSystemsVPNClient/Profiles cp sample.pcf gacq.pcf vi gacq.pcf vpnclient connect gacq