Hawking Technology H-BR49 - Manual (Page 55)

When Should I modify the MAC address for WAN/global port settings?
Some ISPs identify their clients by accessing the MAC address and the host
names. Therefore, this information is required for identification purposes. The
MAC address required for WAN/global port settings is the adapter address for
the IP Sharing you are now configuring. Generally, it should be the one you
already registered in your ISP, and thus, there should be no need to modify it.
However, there is an exception when the IP sharing device you are now using is
not the one with the MAC address that you registered in your ISP. If this is the
case, it then becomes necessary to modify the MAC address.
What is DMZ?
DMZ is an abbreviation for “demilitarized zone”. A DMZ is a sort of middle
region between an external network, such as the Internet, and a company's
Intranet or internal network. It is a subnet that contains a firewall and proxy
server, which exist either in separate servers or in a single server. The firewall
connects to an external firewall on the Internet side, which may be at the ISP's
location and is often called a "boundary router." The double firewall architecture
adds an extra measure of security for the Intranet.
What is Dynamic DNS (DDNS)?
Through the Dynamic DNS service, an IP Registry provides a public central
database where information such as email addresses, hostnames, IPs etc. can be
stored and retrieved. If your DNS server uses an IP associated with dynamic IP,
DDNS will resolve this issue. The Dynamic DNS service acts much the same
way as old-time phone operators: users call the operator and ask to speak to you;
the operator, who knows your extension, will make the connection. Every time
your computer comes online, it will inform the Dynamic DNS server what the
current IP address is. Users who need to connect to your server will be sent to the
right place. You can visit HTTP://WWW.DYNDNS.ORG for more information
about DDNS.
Why "Dynamic DNS?"
With Dynamic DNS support, you can alias a dynamic IP address to a static
hostname, allowing the host to be more easily accessible from various locations