ZyXEL Communications 70 Series User Manual

ZyWALL 5/35/70 Series User’s Guide

653 

Chapter 52 Troubleshooting

Table 245   Troubleshooting the DMZ Interface

Cannot access 

servers on the DMZ 

from the LAN.

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

for DMZ connection instructions.

Make sure the Ethernet adapters on the LAN computer and the DMZ server are 

installed and functioning properly.

Verify that the IP address of the DMZ port and the LAN port are on separate 

subnets.

Make sure that NAT is configured for your DMZ servers.

Cannot ping any 

computer on the 

DMZ.

Check the 10M/100M DMZ 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 servers 

are on the same subnet.

Table 246   Troubleshooting the WAN Interface 

Cannot get WAN IP 

address from the 

ISP.

The ISP provides the WAN IP address after authentication. Authentication may 

be through the user name and password, the MAC address or the host name. 

Use the following corrective actions to make sure the ISP can authenticate your 

connection. 

You need a user name and password if you're using PPPoE or PPTP 

encapsulation. Make sure that you have entered the correct Service Type, User 

Name and Password (the user name and password are case sensitive). Refer 

to 

 or 

If your ISP requires MAC address authentication, you should clone the MAC 

address from your computer on the LAN as the ZyWALL's WAN MAC address. 

Refer to 

. It is recommended 

that you clone your computer's MAC address, even if your ISP presently does 

not require MAC address authentication.

If your ISP requires host name authentication, configure your computer's name 

as the ZyWALL's system name. Refer to 

.