User Guide

Windows XP Firewall Configuration
Overview
The following instructions detail how to configure Window XP's built-in firewall for use with the
Keyspan USB Server. While these instructions are specific for this software, the basic idea of
these instructions can be applied to configuring other firewalls.
These instructions will show you how to:
determine the Keyspan USB Server's port numbers and IP address
access your firewall software
add settings to your firewall to allow communication with
your Keyspan USB Server
Step 1 - Determine Your Keyspan USB Server's Port Numbers and IP Address
You will need to know your USB Server's UDP/TCP port numbers and IP address prior to
configuring your firewall. If you already know this information, skip ahead to Step 2. Otherwise,
please read on.
UDP and TCP Port Numbers
The Keyspan USB Server defaults to using UDP port 3842 and TCP/IP port 3842. If haven't
changed these settings, we will use these port numbers when we configure your firewall.
If you've changed the USB Server's UDP and/or TCP port numbers, please note that you will
have to enter your UDP port number instead of 3842.
Obtaining Your IP Address
To obtain your IP address, open the Keyspan USB Server application. When it is open, click the
Admin tab and locate your USB Server. Click on your server and you should see its IP number
under network settings (see next image):
Keyspan:USB Server - User Manual
This User Manual applies to the Keyspan USB Server Software Version 1.0
Rev 2004apr06 Page 39