Setting up a VPN in Linux can be as easy as Windows if your Linux distrubiton such as Ubuntu comes prepared for a VPN connection and many versions of Linux do. Sometimes VPN setup on Linux can be a bit more difficult.
The only "VPN/Network Management Plugins" you need would be PPTP (which we use) and OpenVPN (used for Stealth VPN/Situations where VPN connections are blocked by their ISP/Country).
Ubuntu Linux Setup Guide
VPN Error 800:
Unable to establish the VPN connection. The VPN server may be un-reachable, or security parameters may not be configured properly for this connection.
Solution/How To Fix VPN Error 800:
VPN Error 800 can be caused for a number of reasons. If the VPN Server is really down then you have to wait or contact your VPN A........