Client TCP/UDP Ports Used in Windows Update?

[Jimbo]

I need to configure my firewall to restrict Internet access for
certain users. However, they _should_ be allowed access to Windows
Update, so I want to enable outbound firewall openings only for the
required IP ports.

Microsoft's knowledgebase has great information re inbound openings
for most of its products, but I could not find the inforamtion related
to outbound Windows Update connections.

Can anyone help in this regard?

Thanks,

Jim

 

[Carey Frisch [MVP]]

Windows Update requires both ports 80 and 443 to be open for both
for incoming & outgoing traffic.

Error Messages When You Use Windows Update Through a Proxy Server or a Firewall
http://support.microsoft.com/default.aspx?scid=kb;en-us;241783

Unable to View Updates On Windows Update Site Using Secure Socket Layer
http://support.microsoft.com/default.aspx?scid=kb;en-us;326253

--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Microsoft Newsgroups

Get Windows XP Service Pack 2 with Advanced Security Technologies:
http://www.microsoft.com/athome/security/protect/windowsxp/choose.mspx

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:

| I need to configure my firewall to restrict Internet access for
| certain users. However, they _should_ be allowed access to Windows
| Update, so I want to enable outbound firewall openings only for the
| required IP ports.
|
| Microsoft's knowledgebase has great information re inbound openings
| for most of its products, but I could not find the inforamtion related
| to outbound Windows Update connections.
|
| Can anyone help in this regard?
|
| Thanks,
|
| Jim

 

[Jimbo]

Excellent--thanks Carey. HTTP and HTTPS will work great.

Jim