Chapter 45 Troubleshooting
AX/DX/EX/PX Series User’s Guide
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5 Reset the Zyxel Device to its factory default, and try to access the Zyxel Device with the default IP
address.
6 If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
Advanced Suggestions
• Make sure you have logged out of any earlier management sessions using the same user account
even if they were through a different interface or using a different browser.
• Try to access the Zyxel Device using another service, such as Telnet. If you can access the Zyxel
Device, check the remote management settings and firewall rules to find out why the Zyxel Device
does not respond to HTTP.
I cannot log into the Zyxel Device.
1 Make sure you have entered the user name and password correctly. The default user name is admin.
These both user name and password are case-sensitive, so make sure [Caps Lock] is not on.
2 You cannot log in to the Web Configurator while someone is using Telnet to access the Zyxel Device.
Log out of the Zyxel Device in the other session, or ask the person who is logged in to log out.
3 Turn the Zyxel Device off and on.
4 If this does not work, you have to reset the Zyxel Device to its factory default.
I cannot log into the Zyxel Device using DDNS.
If you connect your Zyxel Device to the Internet and it uses a dynamic WAN IP address, it is inconvenient
for you to manage the Zyxel Device from the Internet. The Zyxel Device’s WAN IP address changes
dynamically. Dynamic DNS (DDNS) allows you to access the Zyxel Device using a domain name.
To use this feature, you have to apply for DDNS service at www.dyndns.org.
Note: If you have a private WAN IP address, then you cannot use DDNS.
Here are the three steps to use a domain name to log in the Web Configurator:
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