This article describes how to manually open ports in Internet Connection Firewall (ICF) in Windows XP.
Programs may require ports to be manually opened so that the programs work correctly when ICF is in use either on the local computer or on the gateway computer. You may have to manually open a port if there is a service that is running on a computer that has ICF enabled that you want to make available to users on the Internet.
Note The actual port settings vary from program to program.
To manually open a port, follow these steps:
1. Click Start, and then click My Network Places.
2. Under Network Tasks, click View Network Connections. (Or, right-click My Network Places on the desktop, and then click Properties.)
3. Right-click the connection that you use for the Internet, and then click Properties.
4. Click the Advanced tab, and then click Settings.
Note If the Settings button is unavailable, ICF is not enabled on this connection, and you do not have to open any ports (because they are all already open).
5. Click Add to open a new port.
6. In the Description box, type a friendly name. For example, type File Sharing : Port 445.
7. In the Name or IP address of the computer hosting this service on your network box, type 127.0.0.1.
Note You can specify the IP address of an internal computer. But you typically will use 127.0.0.1.
8. In the External port and Internal port boxes, type the port number. Generally, this number is the same.
9. Click either TCP or UDP, and then click OK.
10. Repeat steps 1 through 9 for each port that you want to open.
For additional information about some applications and games that may require you to manually open the ports so that the programs can work correctly, and for information about which inbound ports to open, visit the following Microsoft Web site:
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