DIR-430 RangeBooster G Wireless Router User’s Guide
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Static & Dynamic IP Addresses
IP stands for Internet Protocol. All IP based network devices like PCs, print
servers, Gateways, and routers have IP addresses that are independent of the
type of network interface. The IP address denotes the identity of the device on
the IP networks, both LAN and WAN. IP addresses can be assigned manually to a
device, or dynamically through a central server.
Static IP address
is a fixed, and manually assigned to a PC or any other device
on the network. They retain their address until you change it. This type of
addressing is useful especially for the hosts/routers/Gateways that offer services
(Web, FTP, printer), and you may want to access them using their known static IP
address. If your ISP provides with static IP address, please use the static IP
settings for the Internet Access Connection Mode.
Dynamic IP address
is assigned for temporary usage, issued by a server (DHCP
Server can be PC, Gateway or any other network service) in the network. The IP
address obtained this way is not guaranteed to be constant. After a certain time
period, they expire and may change. The DHCP server is notified of the expiry,
and may assign the same or different IP address to a network device. This is used
in the cases; where there is a constraint on the number of IP addresses, or to
reduce the configuration on the network devices and keeping the IP addressing
configuration centrally located.
For DSL connections, many ISPs may require you to log on with a user name and
password to have access to the Internet. The technology used is Point-to-Point
Protocol over Ethernet (PPPoE), which is similar to (PPP) dial-up connection, with
no telephone number dialling involved, provides dynamic IP address.
Firewall – Its need
With a rapid growth in the Internet around the world, and because of its open
nature of the Internet Protocol standard, network security has become a major
concern to the companies around the world. Once you are connected to the
Internet, you are physically connecting your network to few thousands of
unknown networks and their users. This enables all the Internet users around the
world to share the information. But the idea opens up the possibility of
confidential information being leaked out to Internet users who are involved in
unlawful activities.
There are various types of attacks on the Internet; few for example, Denial-of-
service attacks, SMURF, SYN flooding, ping of death attacks, Application layer
attacks. To protect a private network from all these type of attacks, firewall came
into existence. Your RGS Pro Gateway has firewall that provides a single point of
defence between two networks and can secure your Local Network.
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