How to allow FTP port in Windows Firewall?

Microsoft Windows XP service pack 2 comes with inbuilt Firewall. If Microsoft Windows Firewall is blocking a port that is used by a service or by a program, you can configure the Windows Firewall to create an exception. Windows Firewall may be blocking a program or a service if Programs do not respond to a client's request or you do not get data from server.

To open FTP port 21 you need to change Windows Firewall settings.

1. Click on Start > Settings > Control Panel > Click on Security center
2. At the bottom window (Manage security settings for:) you will see Windows Firewall option.

3. Click on this option. It will open Windows Firewall dialog box:
Select Exceptions tab > Click on Add Port button

4. Add port 21 and 20 as follows.

5. Save Firewall settings by clicking on OK button.

6. You are done; now your Windows XP will allow incoming FTP connection.
7. Restart your PC.

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