ZyXEL Communications ZyWALL5UTM 4.0 User Manual

ZyWALL 5/35/70 Series User’s Guide

Chapter 52 Troubleshooting

648

This chapter covers potential problems and possible remedies. After each problem description, 
some instructions are provided to help you to diagnose and to solve the problem. Please see 
our included disk for further information.

Table 243   Troubleshooting the Start-Up of Your ZyWALL

None of the LEDs 

turn on when you 

turn on the 

ZyWALL.

Make sure that you have the included power adaptor or cord connected to the 

ZyWALL and to an appropriate power source.

If the error persists, you may have a hardware problem. In this case, you should 

contact your vendor.

Cannot access the 

ZyWALL via the 

console port.

1. Check to see if the ZyWALL is connected to your computer's console port.

2. Check to see if the 

communications program is 

configured correctly. The 

communications software 

should be configured as 

follows:

VT100 terminal emulation

9600 bps is the default speed on leaving the 

factory. Try other speeds in case the speed has 

been changed.

No parity, 8 data bits, 1 stop bit, data flow set to 

none.

Table 244   Troubleshooting the LAN Interface 

Cannot access the 

ZyWALL from the 

LAN.

Check your Ethernet cable type and connections. Refer to the Quick Start Guide 

for LAN connection instructions.

Make sure the computer's Ethernet adapter is installed and functioning properly.

Cannot ping any 

computer on the 

LAN.

Check the 10M/100M LAN LEDs on the front panel. One of these LEDs should 

be on. If they are both off, check the cables between your ZyWALL and hub or 

the station.

Verify that the IP address and the subnet mask of the ZyWALL and the 

computers are on the same subnet.