Ssh Overview; How Ssh Works; Figure 176 Common Zywall Certificate; Figure 177 Ssh Communication Example - ZyXEL Communications ZyWall 70 User Manual

ZyWALL 70 User's Guide

Figure 176 Common ZyWALL Certificate

22.5 SSH Overview

Unlike Telnet or FTP, which transmit data in clear text, SSH (Secure Shell) is a secure
communication protocol that combines authentication and data encryption to provide secure
encrypted communication
between two hosts over an unsecured network.

Figure 177 SSH Communication Example

22.6 How SSH works

The following table summarizes how a secure connection is established between two remote
hosts.
362 Chapter 22 Remote Management