KVpnc is a KDE frontend for various VPN
clients. It supports Cisco VPN (vpnc, vpnclient (a proprietary client from Cisco)), IPSec
(FreeS/WAN, Openswan, strongSwan, racoon), PPTP (pptpclient), OpenVPN, L2TP over IPSec (l2tpd, xl2ltpd) (usable with FreeS/WAN, Openswan, strongSwan, and racoon) and Vtun. Smartcards will be supported within OpenVPN and strongSwan.
vpnc is a replacement for the Cisco VPN client, and is used as a client for the Cisco3000 VPN Concentrator. FreeS/WAN, Openswan, and strongSwan are IPSec clients for Linux 2.4.x/2.6.x, and racoon is an IPSec client for Linux 2.6.x and *BSD. l2tpd is a Linux L2TP VPN client/server.