ZyXEL Communications NBG410W3G Series User Manual

Chapter 21 Troubleshooting

NBG410W3G Series User’s Guide

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I cannot use FTP to upload / download the configuration file. / I cannot use 
FTP to upload new firmware. 

See the troubleshooting suggestions for 

 Ignore the suggestions about your browser.

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I cannot get a WAN IP address from the ISP.

1 The ISP provides the WAN IP address after authenticating you. Authentication may be 

through the user name and password, the MAC address or the host name.
The username and password apply to PPPoE and PPPoA encapsulation only. Make sure 
that you have entered the correct Service Type, User Name and Password (be sure to 
use the correct casing). Refer to the WAN setup chapter (web configurator).

2 Disconnect all the cables from your device, and follow the directions in the Quick Start 

Guide again. 

3 If the problem continues, contact your ISP.

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I cannot access the Internet.

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

the Quick Start Guide and 

2 Make sure you entered your ISP account information correctly in the wizard, or WAN 

screen. These fields are case-sensitive, so make sure [Caps Lock] is not on. 

3 If you are trying to access the Internet wirelessly, make sure the wireless settings in the 

wireless client are the same as the settings in the AP. 

4 Disconnect all the cables from your device, and follow the directions in the Quick Start 

Guide again. 

5 If the problem continues, contact your ISP. 

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I cannot access the Internet anymore. I had access to the Internet (with the 
ZyXEL Device), but my Internet connection is not available anymore.