If the dynamic DNS service provider is notified of the same IP
address again and again, then itconsiders it an abuse and might
block the host name. To avoid this scenario, the IP address
thatwas successfully updated to the ISP is stored on the unit.
Whenever we receive an IP addresschange notification, the
new IP address is compared with the IP address that was
stored on the lastupdate. If they differ, then only an update
request is sent. However, when the system comes upthere is no
way of knowing what was the IP address on last successful
update before the systemwent down. You need to give the
command “system config save“ periodically to save this IP
addresson Flash.
Registering With Dynamic DNS Service Provider
Currently, Wireless Gateway supports two Dynamic DNS
service providers, www.tzo.com andwww.dyndns.com. To use
their Dynamic DNS service, you first need to visit the Web site
of a serviceprovider and register. While registering, you need to
provide your username, password, andhostname as mandatory
parameters. A service provider may also prompt you to fill some
optionalparameters.
Configuring IP Interfaces
You need to create a Dynamic DNS interface per IP interface
and can only create one DynamicDNS interface service on one
IP interface. For more information on creating IP interfaces,
refer tosection Creating IP interfaces.
www.dyndns.org provides three kinds of services - Dynamic DNS,
Custom DNS and Static DNS. You can create different domains in
these systems. Custom DNS service is a full DNS solution for
newly purchased domains 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 points a DNS hostname
in some domain owned by dyndns.org to the user's ISP-assigned
static or pseudo-static IP address.
DynDNS service points a fixed hostname in some domain owned
by dyndns.org to the user's ISP-assigned dynamic IP address.
This allows more frequent update of IP addresses, than allowed
by Static DNS.
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