ZyXEL Communications ZYWALL 5 - 21.8 Configuring SSH; 40.8 Configuring SSH

ZyWALL 5 User’s Guide
338 Chapter 21 Remote Management
Figure 171 Common ZyWALL Certificate
21.5 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 172 SSH Communication Example
21.6 How SSH works
The following table summarizes how a secure connection is established between two remote
hosts.