Watchguard Wireless Router User's Guide Page 28

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Installing the Firebox X Edge
14 WatchGuard Firebox X Edge
•DHCP: A dynamic IP address is an IP address that an ISP lets
you use (lease). With DHCP, your computer does not always use
the same IP address. When you close an Internet connection
that uses a dynamic IP address, the dynamic address is made
available again. Then the ISP can assign that IP address to a
different customer. ISPs use Dynamic Host Configuration
Protocol (DHCP) to assign you a dynamic IP address. Each time
you connect to the ISP, a DHCP server assigns you an IP address.
It could be the same IP address you had before, or it could be a
new IP address.
PPPoE: ISPs can also use Point-to-Point Protocol over Ethernet
(PPPoE) to assign you an IP address. A user name and password
are necessary for PPPoE. Usually, a PPPoE address is dynamic.
The ISP also assigns a subnet mask (also known as the netmask) to a
computer. A subnet mask divides a larger network into smaller net-
works. A subnet mask is a string of bits that “mask” one section of
an IP address to show how many IP addresses can be on the smaller
network.
Read your DSL or cable modem instructions or speak to your ISP to
learn if you have a dynamic IP address or a static IP address.
Finding your TCP/IP properties
Transmission Control Protocol/Internet Protocol (TCP/IP) is the pri-
mary protocol computers use to connect to the Internet. To use
TCP/IP, your computer must have an IP address and information
about the computer network of your ISP. You must have this infor-
mation to install your Firebox X Edge.
N
OTE
N
OTE
If your ISP assigns your computer an IP address that starts with 10
or 192.168 or 172.16 to 172.31, then your ISP uses Network
Address Translation (NAT). We recommend that you get a public IP
address for your Edge external IP address. If you use a private IP
address, you can have problems with some features, including
VPN.
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