User`s manual

WLAN Router

Above Figure explains one such scenario in which a host gets a dynamic IP address for itself from a DHCP server. As

the host has registered with one of the dynamic DNS service providers on the Internet, it sends an update message

to the service provider with host name and changed IP address. The service provider updates the new IP address

of the host in the zone les that have entry for that host name and replies back with some return code. The return

code communicates the success or failure of the update message. This process is repeated every time the host’s IP

address changes.

If the dynamic DNS service provider is notied of the same IP address again and again, then it considers it an abu-

se and might block the host name. To avoid this scenario, the IP address that was successfully updated to the ISP is

stored on the unit. Whenever we receive an IP address change notication, the new IP address is compared with the

IP address that was stored on the last update. If they dier, then only an update request is sent. However, when the

system comes up there is no way of knowing what was the IP address on last successful update before the system

went down. You need to give the command “system cong save“ periodically to save this IP address on Flash.

Registering With Dynamic DNS Service Provider

Currently, Wireless Gateway supports two Dynamic DNS service providers, www.tzo.com and www.dyndns.com. To

use their Dynamic DNS service, you rst need to visit the Web site of a service provider and register. While registe-

ring, you need to provide your username, password, and hostname as mandatory parameters. A service provider

may also prompt you to ll some optional parameters.

Conguring IP Interfaces

You need to create a Dynamic DNS interface per IP interface and can only create one Dynamic DNS interface service

on one IP interface. For more information on creating IP interfaces, refer to section Creating IP interfaces.

Note

www.dyndns.org provides three kinds of services - Dynamic DNS, Custom DNS and Static DNS. You can cre-

ate dierent domains in these systems. Custom DNS service is a full DNS solution for newly purchased do-

mains or domains you already own. A web-based interface provides complete control over resource records

and your entire domain, including support for dynamic IPs and automated updates. Static DNS service po-

ints a DNS hostname in some domain owned by dyndns.org to the user’s ISP-assigned static or pseudo-sta-

tic IP address.

DynDNS service points a xed hostname in some domain owned by dyndns.org to the user’s ISP-assigned dy-

namic IP address. This allows more frequent update of IP addresses, than allowed by Static DNS.

From the left-hand Management -> DDNS menu. The following page is displayed: