ZyXEL Communications 200 Series User Manual

 Chapter 43 System

ZyWALL USG 100/200 Series User’s Guide

This section describes how to access the ZyWALL using the OpenSSH client program that 
comes with most Linux distributions. 

1 Test whether the SSH service is available on the ZyWALL. 

Enter “telnet 192.168.1.1 22” at a terminal prompt and press [ENTER]. The 
computer attempts to connect to port 22 on the ZyWALL (using the default IP address of 
192.168.1.1). 

A message displays indicating the SSH protocol version supported by the ZyWALL. 

Figure 518   SSH Example 2: Test 

2 Enter “ssh –1 192.168.1.1”. This command forces your computer to connect to 

the ZyWALL using SSH version 1. If this is the first time you are connecting to the 
ZyWALL using SSH, a message displays prompting you to save the host information of 
the ZyWALL. Type “yes” and press [ENTER]. 

Then enter the password to log in to the ZyWALL. 

Figure 519   SSH Example 2: Log in

3 The CLI screen displays next. 

You can use Telnet to access the ZyWALL’s command line interface. Specify which zones 
allow Telnet access and from which IP address the access can come.

Click System > TELNET to configure your ZyWALL for remote Telnet access. Use this 
screen to specify from which zones Telnet can be used to manage the ZyWALL. You can also 
specify from which IP addresses the access can come.

$ telnet 192.168.1.1 22

Trying 192.168.1.1...

Connected to 192.168.1.1.

Escape character is '^]'.

SSH-1.5-1.0.0

$ ssh –1 192.168.1.1

The authenticity of host '192.168.1.1 (192.168.1.1)' can't be established.

RSA1 key fingerprint is 21:6c:07:25:7e:f4:75:80:ec:af:bd:d4:3d:80:53:d1.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added '192.168.1.1' (RSA1) to the list of known hosts.

Administrator@192.168.1.1's password: