ZyXEL Communications NBG410W3G Series User Manual

 Chapter 14 DNS

NBG410W3G Series User’s Guide

Dynamic DNS allows you to update your current dynamic IP address with one or many 
dynamic DNS services so that anyone can contact you (in NetMeeting, CU-SeeMe, etc.). You 
can also access your FTP server or Web site on your own computer using a domain name (for 
instance myhost.dhs.org, where myhost is a name of your choice) that will never change 
instead of using an IP address that changes each time you reconnect. Your friends or relatives 
will always be able to call you even if they don't know your IP address. 
First of all, you need to have registered a dynamic DNS account with www.dyndns.org. This is 
for people with a dynamic IP from their ISP or DHCP server that would still like to have a 
domain name. The Dynamic DNS service provider will give you a password or key. 

"

You must go to the Dynamic DNS service provider’s website and register a 
user account and a domain name before you can use the Dynamic DNS 
service with your ZyXEL Device.

Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be aliased to the 
same IP address as yourhost.dyndns.org. This feature is useful if you want to be able to use, 
for example, www.yourhost.dyndns.org and still reach your hostname.

IP

Select From ISP if your ISP dynamically assigns DNS server information (and 

the ZyXEL Device's WAN IP address). Use the drop-down list box to select a 

DNS server IP address that the ISP assigns in the field to the right. 
Select User-Defined if you have the IP address of a DNS server. Enter the 

DNS server's IP address in the field to the right. If you chose User-Defined, but 

leave the IP address set to 0.0.0.0, User-Defined changes to None after you 

click Apply. If you set a second choice to User-Defined, and enter the same IP 

address, the second User-Defined changes to None after you click Apply. 
Select DNS Relay to have the ZyXEL Device act as a DNS proxy. The ZyXEL 

Device's LAN or DMZ IP address displays in the field to the right (read-only). 

The ZyXEL Device tells the DHCP clients on the LAN or DMZ that the ZyXEL 

Device itself is the DNS server. When a computer on the LAN or DMZ sends a 

DNS query to the ZyXEL Device, the ZyXEL Device forwards the query to the 

ZyXEL Device's system DNS server (configured in the DNS System screen) 

and relays the response back to the computer. You can only select DNS Relay 

for one of the three servers; if you select DNS Relay for a second or third DNS 

server, that choice changes to None after you click Apply. 
Select None if you do not want to configure DNS servers. You must have 

another DHCP sever on your LAN, or else the computers must have their DNS 

server addresses manually configured. If you do not configure a DNS server, 

you must know the IP address of a computer in order to access it.

Apply

Click Apply to save your changes.

Reset

Click Reset to begin configuring this screen afresh.