ZyXEL Communications 100 Series User Manual

Chapter 49 Troubleshooting

ZyWALL USG 100/200 Series User’s Guide

If you cannot access the ZyWALL by any method, try restarting it by disconnecting and 
reconnecting the power. If you still cannot access the ZyWALL by any method or you forget 
the administrator password(s), you can reset the ZyWALL to its factory-default settings. Any 
configuration files or shell scripts that you saved on the ZyWALL should still be available 
afterwards.

Use the following procedure to reset the ZyWALL to its factory-default settings. This 
overwrites the settings in the startup-config.conf file with the settings in the system-
default.conf file. 

"

This procedure removes the current configuration. 

If you want to reboot the device without changing the current configuration, see 

.

1 Make sure the SYS LED is on and not blinking.
2 Press the RESET button and hold it until the SYS LED begins to blink. (This usually 

takes about five seconds.)

3 Release the RESET button, and wait for the ZyWALL to restart.

You should be able to access the ZyWALL using the default settings.

Search for support information for your model at www.zyxel.com for more troubleshooting 
suggestions.