Westermo ADSL-350 - Manual (Page 21)

21 6623-2231
Configure LAN clients to use the ADSL-350 as their gateway
The ADSL-350 will act as a gateway for connections destined to the Internet. The default
configuration will provide Network Address Translation and firewalling to protect clients
on the local network.
In order to configure any LAN clients to use the ADSL-350 as their gateway the follow-
ing to methods can be used;
If the clients have a DHCP address allocated by the ADSL-350, they will have learned the
necessary settings. No further configuration is needed.
Or, if clients have static IP addresses, set their default route and DNS server to the IP
address of the ADSL-350, by default 192.168.2.200.
The ADSL-350 sometimes changes the ADSL IP address /
Our provider cannot offer us a fixed IP address
In some applications there is a need to connect to the ADSL-350 from the Internet,
either via a VPN (recommended) or by opening up the firewall for some specific services
/ ports. Either way, the connecting systems / devices need to know where to connect
to and if the service provider keeps changing the ADSL IP address that the unit receives
from their servers it can become a nightmare to constantly update any settings in the
systems / devices. Luckily there is a solution to this that is very commonly used on the
Internet and it is called Dynamic DNS, or DDNS.
It works in roughly the following way; once the ADSL-350 notices that it has a new
IP-address on the ADSL interface it will send an update to the DDNS service provider
that will update the domain name that have been associated with the unit.
The most common DDNS provider is called Dyn™ (earlier DynDNS ™) –
http://dyn.com – but there are others out there as well. The ADSL-350 supports a
few different providers that can be found on the configuration page of DDNS.
Register an account with the provider of choice and then configure a domain
name with that provider to be used on the ADSL-350. Then it is time to configure
the ADSL-350 to use the domain name so that it can be accessed instead of the
direct IP address, removing the need to actually know the IP address.
Navigate to the top-menu
Network followed by the sub-menu DNS.
For the purpose of this example the following details will be used;
Domain name server.mine.nu
Username
user
Password pass