ZyXEL Communications NBG410W3G - Manual (Page 267)

Chapter 15 Remote Management
NBG410W3G Series User’s Guide
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Figure 165 Common ZyXEL Device Certificate
15.5 SSH
You can use SSH (Secure SHell) to securely access the ZyXEL Device’s command line
interface. Specify which interfaces allow SSH access and from which IP address the access
can come.
Unlike Telnet or FTP, which transmit data in plaintext (clear or unencrypted text), SSH is a
secure communication protocol that combines authentication and data encryption to provide
secure encrypted communication between two hosts over an unsecured network. In the
following figure, computer A on the Internet uses SSH to securely connect to the WAN port of
the ZyXEL Device for a management session.
Figure 166 SSH Communication Over the WAN Example
15.6 How SSH Works
The following table summarizes how a secure connection is established between two remote
hosts.
SSH
A