Chapter 1: Foundation

Virtual Private Networks (VPN)

• Figure 7-25  Establishing a Virtual Private Network.

SSH Encryption (secure shell)

• A pair of protocols (versions 1 and 2) that provides an authenticated and encrypted path to the shell or operating system command interpreter.
• Both SSH versions replace Unix utilities such as Telnet, rlogin, and rsh for remote access.
• The SSH protocol involves negotiation between local and remote sites for encryption algorithm (for example, DES, IDEA, AES) and authentication (including public key and Kerberos).
• VPN vs. SSH: http://www.howtogeek.com/118145/vpn-vs.-ssh-tunnel-which-is-more-secure/