Dynamic Dns; Dyndns Wildcard - ZyXEL Communications ZYWALL 35 User Manual

Chapter 25 DNS
Table 151 ADVANCED > DNS > DHCP
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IP
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25.10 Dynamic DNS

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 ZyWALL.

25.10.1 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.
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DESCRIPTION
Select From ISP if your ISP dynamically assigns DNS server information (and
the ZyWALL'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 ZyWALL act as a DNS proxy. The ZyWALL's
LAN, DMZ or WLAN IP address displays in the field to the right (read-only). The
ZyWALL tells the DHCP clients on the LAN, DMZ or WLAN that the ZyWALL
itself is the DNS server. When a computer on the LAN, DMZ or WLAN sends a
DNS query to the ZyWALL, the ZyWALL forwards the query to the ZyWALL'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.
Click Apply to save your changes back to the ZyWALL.
Click Reset to begin configuring this screen afresh.
ZyWALL 5/35/70 Series User's Guide