Tcp/Ip Properties - Watchguard Firebox X20E User Manual

Identifying Your Network Settings
PPPoE: An ISP also can use PPPoE (Point-to-Point Protocol over Ethernet) to assign you an IP
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address. Usually, a PPPoE address is dynamic. You must have a user name and a password to use
PPPoE.
The ISP assigns a subnet mask (also known as the netmask) to a computer. A subnet mask divides a
larger network into smaller networks. 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. For example, a large network
subnet mask looks like this: 255.255.0.0. Each zero shows that a range of IP addresses from 1 to 255 is
available. Each decimal place of 255 represents an IP address range that is in use. In a network with a
subnet mask of 255.255.0.0, there are 65,025 IP addresses available. A smaller network subnet mask is
255.255.255.0. In this example, only 254 IP addresses are available.
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.

TCP/IP properties

To learn about the properties of your network, look at the TCP/IP properties of your computer or any
other computer on the network. You must have the following information to install your
Firebox X Edge:
IP address
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Subnet mask
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Default gateway
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Whether your computer has a static or dynamic IP address
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IP addresses of primary and secondary DNS servers
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If your ISP assigns your computer an IP address that starts with 10, 192.168, or 172.16 to 172.31, then your
ISP uses NAT (Network Address Translation) and your IP address is private. We recommend that you get a
public IP address for your Firebox X Edge external IP address. If you use a private IP address, you can have
problems with some features, such as virtual private networking.
To find your TCP/IP properties, use the following instructions for your computer operating system.
Finding your TCP/IP properties on Microsoft Windows Vista
Select Start > Programs > Accessories > Command Prompt.
1
The Command Prompt window appears.
At the command prompt, type ipconfig /all and press Enter.
2
Record the values that you see for the primary network adaptor.
3
Finding your TCP/IP properties on Microsoft Windows 2000, Windows
2003, and Windows XP
Select Start > All Programs > Accessories > Command Prompt.
1
The Command Prompt window appears.
At the command prompt, type ipconfig /all and press Enter.
2
Record the values that you see for the primary network adaptor.
3
Finding your TCP/IP properties on Microsoft Windows NT
Select Start > Programs > Command Prompt.
1
The Command Prompt window appears.
12 Firebox X Edge e-Series