
For many systems administrators, choosing and managing a VPN system is often quite a headache. Inflexible clients, servers, and protocols often prevent VPN's from being smoothly integrated into an already functioning network. The fact that many VPN clients are installed on users' home computers, well out of the reach of the systems administration team, often means that troubleshooting and upgrading VPN systems is time consuming and a struggle for both admins and users.
I've been looking for a VPN solution that's based on other methods than key authentication. Does anyone know of VPN servers that is PAM based? It would be nice to intergrate this with the LDAP user database(and such).