Allied Telesis AlliedWare NetScreen Routers - Manual (Page 2)

Use Dynamic DNS To Allow You To Host Servers Behind A Dynamically-Assigned Public IP Address 2
DynDNS.com hostnames
In order to use the dynamic DNS client on the router, you first need to register at least one
hostname (actually a fully qualified domain name—FQDN) with DynDNS.com.
The dynamic DNS client can work with the following three hostname types from
DynDNS.com:
•
Dynamic Hosts
This is the option to use if you don't own a domain name, but you want to host a server
on your network and have people reach it by entering a domain name.
Dynamic hosts are free to register with DynDNS.com, and allow you to associate a
dynamic IP address with up to five of the static domain names that DynDNS.com provide.
Dynamic host IP associations require at least one update every 35 days to prevent them
from expiring.
• Static Hosts
This is the option to use if you have a fixed IP address, you want to host a server on your
network and have people reach it by entering a domain name, but you do not want to buy
your own domain name.
Like dynamic hosts, static hosts are free to register with DynDNS.com, and allow you to
associate your public IP address with up to five of the static domain names that
DynDNS.com provides. However, static hosts are designed for use with IP addresses that
rarely or never change. This means that static host IP associations do not expire, and that
dynamic DNS updates take longer to propagate through the DNS system with static hosts.
• Custom Hosts
This is the option to use if you already own your own domain name.
Custom hosts support both static and dynamic IP addresses. For custom hosts, in addition
to automatic updates via the dynamic DNS client, DynDNS.com also provides a web-based
interface where you can make updates directly. Such direct changes propagate through the
DNS system very quickly.