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Beginning OpenVPN 2.0.9 by Norbert Graf, Markus Feilner

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Appendix A. Internet Resources and More

Chapter 1

A concise but easy explanation of the OSI model can be found in Wikipedia:

http://en.wikipedia.org/wiki/OSI_model

Available OSI protocols:

http://en.wikipedia.org/wiki/OSI_protocols

The Internet Protocol (IP):

http://en.wikipedia.org/wiki/Internet_Protocol

A basic introduction to IPsec:

http://en.wikipedia.org/wiki/IPsec

SSH-Tunneling:

http://www.ssh.com/support/documentation/online/ssh/winhelp/32/Tunneling_Explained.html.

A very good overview on Layer 2 Forwarding (L2F) can be found here:

http://www.javvin.com/protocolL2F.html.

The Internet Engineering Task Force details can be found at:

http://www.ietf.org.

Read the IPsec article in Wikipedia:

http://en.wikipedia.org/wiki/IPsec.

The Linux ...

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