SmartScreen - what IP addresses/ranges does it need?

Question

_{Tuesday, April 17, 2018 3:45 PM}

I'm trying to configure a network firewall (NOT Windows Firewall) and want to allow PCs to be able to use Windows 10 SmartScreen. At the moment they're displaying a message saying that SmartScreen is unreachable.

What IP address ranges do I need to open up on the network firewall? I'd hoped this would be documented somewhere but I've yet to find it.

Thanks.

All replies (3)

_{Thursday, May 17, 2018 12:55 PM ✅Answered}

Well, I have no idea if this is SmartScreen or not, but adding outbound 80/tcp to 2.22.128.0/19 (owned by Akamai UK) seems to have got rid of the massive delay before IE displayed me any internal websites.

_{Wednesday, April 18, 2018 4:02 AM}

Hi,

I noticed the error message, I found an article may give you some ideas, please refer to the link:

Windows SmartScreen can’t be reached right now

http://www.thewindowsclub.com/windows-smartscreen-cant-reached-right-now

Please Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.

Hope it can help you.

Best Regards,

Tao

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_{Wednesday, April 25, 2018 8:55 AM}

Sorry, that doesn't help me at all.

I need a range or list of IP addresses that Windows clients connect to.

Are you able to extract this info from the SmartScreen product team perhaps?

Otherwise I'll have to disable SmartScreen, which would be a shame.

Thanks.