ZyXEL Communications P-660R-11V3 User Manual

Chapter 25 Troubleshooting

P-660R-T1 v3 User’s Guide

V

I forgot the IP address for the ZyXEL Device.

1 The default IP address is 192.168.1.1.
2 If you changed the IP address and have forgotten it, you might get the IP address of the 

ZyXEL Device by looking up the IP address of the default gateway for your computer. 
To do this in most Windows computers, click Start > Run, enter cmd, and then enter 
ipconfig. The IP address of the Default Gateway might be the IP address of the ZyXEL 
Device (it depends on the network), so enter this IP address in your Internet browser. 

3 If this does not work, you have to reset the device to its factory defaults. See 

.

V

I forgot the password.

1 The default  password is 1234.
2 If this does not work, you have to reset the device to its factory defaults. See 

.

V

I cannot see or access the Login screen in the web configurator.

1 Make sure you are using the correct IP address.

• The default IP address is 

192.168.1.1

.

• If you changed the IP address (

), use the new IP address.

• If you changed the IP address and have forgotten it, see the troubleshooting 

suggestions for 

2 Check the hardware connections, and make sure the LEDs are behaving as expected. See 

the Quick Start Guide.

3 Make sure your Internet browser does not block pop-up windows and has JavaScripts 

and Java enabled. See 

.

4 If there is a DHCP server on your network, make sure your computer is using a dynamic 

IP address. See 

. Your ZyXEL Device is a DHCP server by 

default.
• If there is no DHCP server on your network, make sure your computer’s IP address is 

in the same subnet as the ZyXEL Device. See 

.

5 Reset the device to its factory defaults, and try to access the ZyXEL Device with the 

default IP address. See 

. 

6 If the problem continues, contact the network administrator or vendor, or try one of the 

advanced suggestions.