Can I run a VPN on my server?
Yes, a VPN can be set up and operated on a Linux as well as a Windows
For the Windows Virtual Server, the use of PPTP is the easiest method to
build a VPN. This connection type is not as secure as L2TP or IPsec, but
it is sufficient for many applications.
PPTP-based VPN traffic consists of a TCP connection to the TCP port 1723
on the VPN server and GRE (Generic Routing Encapsulation) -coded packets
for the VPN data. However, PPTP traffic can cause problems with firewalls,
NATs, and web proxies. To avoid this, firewalls must be configured to allow
both the TCP connection and GRE-encapsulated data.
With Linux Virtual Server, For example, the tunnels are built using OpenVPN.