User Manual

Sereniti Smart Home Networking Service | 121
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P ORT F ORWARDING 10
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THIS CHAPTER
Explains how to:
• Enable Universal Plug and Play (UPnP)
• Select a system defined port forwarding rule
• Create a user defined port forwarding rule
• Delete a port forwarding rule
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OVERVIEW
The Smart Home Server creates a firewall between your network and
the Internet. To protect your network, the firewall closes all ports on the
Server to incoming traffic. This does not affect your ability to access the
Internet, send and receive email, download files, etc., but it does prevent
intruders from penetrating your network from the outside.
PORTS
When a program running on one computer attempts to communicate
with a program running on another computer, it does so by connecting
to a port on that computer. A port is a logical connection point that
allows two computers to "talk" to each other.
Ports are identified by number. A computer has more than 65,000 ports,
but most common Internet applications use a very small subset of these
ports – specifically those numbered 0-1023. These are referred to as
"well known ports."