WatchGuard Technologies WatchGuard SOHO and SOHO | tc - Manual (Page 45)

User Guide 2.3 33
CHAPTER 3
Configuring Services
for a SOHO
How does information travel on the internet?
Each packet of information transported over the Internet must be
packaged in a special way to ensure that it is able to travel from
one computer to the next. A system called Internet Protocol (IP)
takes chunks of information and wraps them up with a header
identifying both where the information is going and how it should
be handled enroute.
IP addresses
An IP address defines the specific computer on the Internet that
should send or receive a packet. Every computer on the Internet
has a unique address, including your SOHO device. When
defining a service behind your firewall, you need to include the
private network address for the machine hosting the application.
On the Internet, IP addresses can be identified using either a string
of numbers or the user-friendly domain name. Thus, the IP