VPN : Java Glossary

2008-06-30 by Roedy Green ©1996-2008 Canadian Mind Products
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VPN

Virtual Private Network. Using the public Internet to implement a private WAN. Encrypted protocols are used to prevent snooping by the intermediate nodes. It makes the files on your server look like an extra local drive. You can use this to replace FTP.

VPN creates a virtual site-to-site encrypted link between two computers attached to the Internet, that behaves much like an IP link between two computers over a LAN. They can use that link to communicate in any Internet protocol.

VPN uses SSL/TLS as the cryptographic layer.

OpenVPN tunnels traffic over UDP port 5000. This means you must open up your firewall-router to let that traffic through. The TUN driver passes IP traffic and the TAP driver passes Ethernet traffic. You might use one or the other or both.

FTP
How VPNs work
IPSec
Microsoft proprietary VPN: slow
OpenVPN: free, fast, open source
SANS white paper on TLS and VPN
SSL
TLS
VPN consortium
VPN links

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