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Ports That Are Used by Windows Product Activation
Article ID: 291983 - View products that this article applies to.
This article was previously published under Q291983
Windows Product Activation uses the following ports:
80 - HTTP
443 - HTTPS
For Windows Product Activation to succeed, configure firewalls or other devices that are between the client and the Internet to allow traffic to pass over ports 80, and 443.
You can use Microsoft Internet Explorer or other Internet browsers to test connectivity through these ports.
To test whether port 80 is open:
If your browser displays an error message such as "connection timed out," the corresponding port may be blocked.
Article ID: 291983 - Last Review: May 7, 2007 - Revision: 1.7