ZyXEL Communications NBG4615 User Manual page 225

• If you changed the IP address
• If you changed the IP address and have forgotten it, see the troubleshooting suggestions for
don't know the IP address of my NBG4615.
Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
2
Start Guide.
Make sure your Internet browser does not block pop-up windows and has JavaScript and Java
3
enabled. See
Make sure your computer is in the same subnet as the NBG4615. (If you know that there are
4
routers between your computer and the NBG4615, skip this step.)
• If there is a DHCP server on your network, make sure your computer is using a dynamic IP
address. See
• If there is no DHCP server on your network, make sure your computer's IP address is in the
same subnet as the NBG4615. See
Reset the device to its factory defaults, and try to access the NBG4615 with the default IP address.
5
See Section 5.3.1 on page
If the problem continues, contact the network administrator or vendor, or try one of the advanced
6
suggestions.
Advanced Suggestions
• Try to access the NBG4615 using another service, such as Telnet. If you can access the
NBG4615, check the remote management settings and firewall rules to find out why the
NBG4615 does not respond to HTTP.
• If your computer is connected to the WAN port or is connected wirelessly, use a computer that is
connected to a LAN/ETHERNET port.
I can see the Login screen, but I cannot log in to the NBG4615.
Make sure you have entered the password correctly. The default password is 1234. This field is
1
case-sensitive, so make sure [Caps Lock] is not on.
You cannot log in to the Web Configurator while someone is using Telnet to access the NBG4615.
2
Log out of the NBG4615 in the other session, or ask the person who is logged in to log out.
This can happen when you fail to log out properly from your last session. Try logging in again after
3
5 minutes.
Disconnect and re-connect the power adaptor or cord to the NBG4615.
4
If this does not work, you have to reset the device to its factory defaults. See
5
227.
NBG4615 User's Guide
(Section 18.4 on page
Appendix A on page 233.
Section 18.4 on page
43.
164), use the new IP address.
164.
Section 18.4 on page 164.
Chapter 30 Troubleshooting
I
Section 30.5 on page
225