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11111111 00000000 will usually be shown in the corresponding, more
readable form as 255.255.255.0.
Gateway
A gateway is a piece of software or hardware that passes information
between networks. You'll see this term most often when you either log in to
an Internet site or when you're transient email between different servers.
Primary DNS
When you send email or position a browser to an Internet domain such as
xxxxx.com, the domain name system translates the names into IP
addresses. The term refers to two things: the conventions for naming hosts
and the way the names are control across the Internet.
Secondary DNS
The same function as DNS1. It is option not necessary
Note: need to reboot the device to take this setting effect.
HTTP Port
The device supports two HTTP ports. The first one is default port 80 and
this port is fixed. This port is very useful for Intranet usage. The second
HTTP port is changeable. Users could assign the second port number of
http protocol, and the WAN users should follow the port number to login. If
the http port is not assigned as 80, users have to add the port number in
back of IP address. For example: http://192.168.0.20:80.
If multiple devices are installed on the LAN and also required to be
accessed from the WAN, then the HTTP Port can be assigned as the virtual
server port mapping to support multiple devices.
When the configuration is finish, please click “OK” to save and enable the setting.
3.5.2 DDNS server
DDNS: Stands for Dynamic Domain Name Server
The device supports DDNS. If your device is connected to xDSL directly, you might need this
feature. However, if your device is behind a NAT router, you will not need to enable this feature.
Because DDNS allows the device to use an easier way to remember naming format rather than an
IP address. The name of the domain is like the name of a person, and the IP address is like his
phone number. On the Internet we have IP numbers for each host (computer, server, router, and
so on), and we replace these IP numbers to easy remember names, which are organized into the
domain name. As to xDSL environment, most of the users will use dynamic IP addresses. If users
want to set up a web or a FTP server, then the Dynamic Domain Name Server is necessary. For
more DDNS configuration, please consult your dealer.
Your Internet Service Provider (ISP) provides you at least one IP address which you use to
connect to the Internet. The address you get may be static, meaning it never changes, or dynamic,
meaning it’s likely to change periodically. Just how often it changes, depends on your ISP. A
dynamic IP address complicates remote access since you may not know what your current WAN
IP address is when you want to access your network over the Internet. The solution to the dynamic
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