Doug Madory (also on Bluesky)

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@DougMadory

Director of Internet Analysis at @Kentikinc. Alum of @dynresearch @renesys @uva @dartmouth @usairforce

New Hampshire linkedin.com/in/dougmadory/ Joined August 2013

951 Following 11K Followers 7.2K Posts

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Doug Madory (also on Bluesky) @DougMadory Sep 2

Wrote a post about the recent BGP hijack of Softaculous/Virtualizor that enabled the delivery of a malicious software update to some customers.
kentik.com/blog/latest-bg…

www.kentik.com Latest BGP Hijack Targets Hosting Software Vendor This post analyzes the technical details of the BGP hijack against Softaculous Ltd, the company behind the Softaculous auto-installer and the Virtualizor VM management platform. The hijack enabled an...

Doug Madory (also on Bluesky) @DougMadory 10h

UPDATE: Exchange Online traffic has recovered. After running ~85% below expected levels overnight, traffic began returning around 11:20 UTC (6:20 AM ET) and by 18:10 UTC was ~6% above expected. Of 33 major Microsoft locations we track, only Zurich is still mostly dark.

Doug Madory (also on Bluesky) Verified account @DougMadory 15h

Microsoft’s Exchange Online is back, and then some. After ~19 hours running ~85% below expected, traffic began recovering at 6:20 AM ET (11:20 UTC). By 8:25 AM ET it was running ~19% above expected as queued mail and mailbox syncs caught up.

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Doug Madory (also on Bluesky) @DougMadory 15h

Microsoft’s Exchange Online is back, and then some. After ~19 hours running ~85% below expected, traffic began recovering at 6:20 AM ET (11:20 UTC). By 8:25 AM ET it was running ~19% above expected as queued mail and mailbox syncs caught up.

Doug Madory (also on Bluesky) @DougMadory 17h

Exchange Online is finally climbing back. After ~18 hours running about 85% below expected levels, traffic to Microsoft’s email service began rising sharply at 6:20 AM ET (11:20 UTC), the biggest gain we’ve seen since the outage began.

Doug Madory (also on Bluesky) @DougMadory 1d

First signs of life for Exchange Online. Traffic began climbing at 9:55 PM ET (02:55 UTC) after running ~89% below expected levels for more than nine hours. Still far from normal, but it’s moving.

Microsoft 365 Status Verified account @MSFT365Status 1d

We’ve monitored the status of the changes applied to improve serviceability and confirmed they're not taking as expected. We’re identifying alternate workstreams that can be applied to increase capacity in the face of sustained traffic management imbalances. More info under EX1550543 and MO1550821 in the Microsoft 365 admin center, as well as msft.it/6013xBHsf if the admin center is not available to you.
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