VPN

VPN

Virtual Private Network. A virtual private network provides a secure connection between two or more computers across a public network (such as the Internet or a company LAN or WAN). In a VPN data is encrypted between the participating computers - creating private "tunnels", ensuring that even were the data intercepted that it could not be read by any computer other than those participating in the VPN.

See also IPSec and PPTP.

Relevant links:

http://vpn.shmoo.com - VPN Information and resources.
www.vpnc.org - VPN Consortium.
www.microsoft.com/ntserver/docs/installing_pptp.doc
www.microsoft.com/ntserver/ProductInfo/faqs/PPTPfaq.asp
http://everything.explained.at/Virtual_private_network/ - VPN Explained
www.techontour.com/networking/2007/11/03/ports-needed-for-vpn-passthrough/ - Lists the different ports that need to be open (or forwarded through a firewall) for the different types of VPN.

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