ZyXEL Communications 70 Series - Manual (Page 441)

ZyWALL 5/35/70 Series User’s Guide
441 Chapter 27 Remote Management
Figure 215 Common ZyWALL Certificate
27.5 SSH
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 216 SSH Communication Example
27.6 How SSH works
The following table summarizes how a secure connection is established between two remote
hosts.