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P-663HN-51 User’s Guide
121
C
HAPTER
13
DNS Setup
This chapter describes how to configure DNS settings.
13.1
DNS Server Address
DNS (Domain Name System) maps a domain name to its corresponding IP
address and vice versa. The DNS server is extremely important because without
it, you must know the IP address of a computer before you can access it. The DNS
server addresses you enter when you set up DHCP are passed to the client
machines along with the assigned IP address and subnet mask.
There are two ways that an ISP disseminates the DNS server addresses.
•
The ISP tells you the DNS server addresses, usually in the form of an
information sheet, when you sign up. If your ISP gives you DNS server
addresses, enter them DNS server
screen.
•
Some ISPs choose to disseminate the DNS server addresses using the DNS
server extensions of IPCP (IP Control Protocol) after the connection is up. If
your ISP did not give you explicit DNS servers, chances are the DNS servers are
conveyed through IPCP negotiation. The ZyXEL Device supports the IPCP DNS
server extensions through the DNS proxy feature.
The ZyXEL Device acts as a DNS proxy when the
Primary
and
Secondary
DNS
Server
fields are left blank in the
LAN Setup
screen.
Please note that DNS proxy works only when the ISP uses the IPCP DNS server
extensions. It does not mean you can leave the DNS servers out of the DHCP
setup under all circumstances. If your ISP gives you explicit DNS servers, make
sure that you enter their IP addresses in the
LAN Setup
screen.
Page 122 / 300
Chapter 13 DNS Setup
P-663HN-51 User’s Guide
122
13.2
DNS Setup
Click
Advanced Setup > DNS > DNS Server
to open the following
screen.
Figure 58
Advanced Setup > DNS > DNS Server
The following table describes the fields in this screen.
Table 44
Advanced Setup > DNS > DNS Server
LABEL
DESCRIPTION
Enable Automatic
Assigned DNS
Select this option to have the ZyXEL Device accept and use the first
DNS server IP address it gets from a WAN connection.
Primary DNS
server
Secondary DNS
server
These fields are available when you clear
Enable Automatic
Assigned DNS
.
Enter the IP addresses of the DNS servers the ZyXEL Device is to use.
Save
Click
Save
to save your changes to the ZyXEL Device.
Page 123 / 300
P-663HN-51 User’s Guide
123
C
HAPTER
14
Dynamic DNS Setup
This chapter discusses how to configure your ZyXEL Device to use Dynamic DNS.
14.1
Dynamic DNS Overview
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.
14.1.1
DYNDNS Wildcard
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.
If you have a private WAN IP address, then you cannot use Dynamic DNS.
See
Section 14.2 on page 124
for configuration instruction.
Page 124 / 300
Chapter 14 Dynamic DNS Setup
P-663HN-51 User’s Guide
124
14.2
Dynamic DNS
Click
Advanced Setup > DNS > Dynamic DNS
to open the following
screen.
Figure 59
Advanced Setup > DNS > Dynamic DNS
The following table describes the fields in this screen.
Table 45
Advanced Setup > DNS > Dynamic DNS
LABEL
DESCRIPTION
Host Name
This is the domain name assigned to your ZyXEL Device by your
Dynamic DNS provider.
User Name
This is the user name for the host name’s DDNS account.
Service
This is the name of your Dynamic DNS service provider.
Interface
This is the ZyXEL Device’s WAN connection that uses this DDNS host
name.
Remove
To remove a DDNS entry, select its
Remove
check box and click the
Remove
button.
Add
Click this button to go to a screen where you can configure settings for a
new DDNS entry.
Remove
To remove an entry, select its
Remove
check box and click the
Remove
button.
Page 125 / 300
Chapter 14 Dynamic DNS Setup
P-663HN-51 User’s Guide
125
14.3
Configuring Dynamic DNS
Click
Advanced Setup > DNS > Dynamic DNS > Add
to open the following
screen.
Figure 60
Advanced Setup > DNS > Dynamic DNS > Add
The following table describes the fields in this screen.
Table 46
Advanced Setup > DNS > Dynamic DNS > Add
LABEL
DESCRIPTION
D-DNS
Provider
Select the name of your Dynamic DNS service provider.
Host Name
Type the domain name assigned to your ZyXEL Device by your dynamic
DNS provider.
Interface
Select the ZyXEL Device’s WAN connection that uses this DDNS host
name.
Active
Dynamic DNS
Select this check box to use dynamic DNS.
Username
Type your user name for this DDNS host name.
Password
Type the password assigned for this DDNS host name.
Save/Apply
Click this button to save the changes and have the ZyXEL Device start
using them.

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