Page 254 SonicWALL Internet Security Appliance Administrator’s Guide
17 Troubleshooting Guide
This chapter provides solutions for problems that you might encounter when using the SonicWALL.
If you are unable to solve your problem, please visit the SonicWALL Tech Support Web site at
<http://www.sonicwall.com/ support>. There, you will fi nd resources to help you resolve most
technical issues, as well as a means to contact one of the SonicWALL Technical Support
engineers.

The Link LED is off

• Make sure the SonicWALL is powere d o n.
• Make sure the cable connections are secure. Gently movi ng the cabl e back an d forth should n ot
make the Link LED turn on and off.
• Try replacing the cable with a known good cable.
• Is it the corr ec t cab le? Try usin g a stan da r d Eth e rne t or cr os so ver cabl e inst e ad.

A computer on the LAN cannot access the Internet

• If NAT is enabled, make sure the default router address of the LAN computer is set to the
SonicWALL LAN IP Address.
• All computers on the LAN should be able to log into the SonicWALL Management Interface by
typing the SonicWALL LAN IP Address into the Location or Go to field from a Web browser. If the
SonicWALL authentication screen does not appear, check for Ethernet connectivity problems.
Confirm that the computer without Internet access is assigned an IP address in the correct
subnet.
• Make sure that the SonicWALL is powered on and responsive.
• If a compu ter ca n acc ess th e Soni cWALL Manag ement Inter face, but c annot v iew We b site s,
then check DNS configuration of the co mputer.
• Try restarting your Internet router and the computer.
• The Internet connection can be down. Disconnect the SonicWALL and try to access the
Internet.
• If there are any host devices other than the Internet router connected to the WAN port, they are
inaccessible to users on the LAN unless you have configured the SonicWALL
Intranet settings.

The SonicWALL does not establish authenticated sessions

• Dur i ng initial configurat io n make sure to chan g e th e Management Statio n's IP address to o ne
in the same subnet as the SonicWALL's, such as "192.1 68 .168.200".
• Check to make sure the Web browser has Java, JavaScript, or ActiveX enabled.
• Make sure the users are attempting to log into the correct IP address. The correct address is
the SonicWALL LAN IP A ddress, and not the NAT Public Addr ess if NAT is enabled.
• Make sure that users are attempting to log in with a valid user name an d password.
• Reme mber that passwords are case-sensitive; make sure the "Caps Lock" key is off.