News

Technician’s DNS Change Knocked Microsoft Sites Off the Web

A configuration change made by a Microsoft technician was the source of a Web site blackout that caused many of the software giant’s critical Web sites to be unreachable by their standard domain names for 22 ½ hours Tuesday and Wednesday, according to the company.

Microsoft issued a statement at 7:22 p.m. Pacific Time Wednesday announcing that their sites were back online.

”This was an operational error, and not the result of any issue with Microsoft or third-party products nor the security of our networks,” the company said in the statement.

Among the sites to be unreachable by traditional URLs late Tuesday and most of Wednesday were Microsoft.com and MSN.com. MSNBC.com was reportedly down at the start of business on Wednesday, and millions of Hotmail users spent much of the time without access to e-mail.

The unnamed Microsoft technician made a configuration change at 6:30 p.m. Tuesday to the routers on the edge of Microsoft’s Domain Name Service network, which connects domain names with numeric IP addresses.

According to the company statement, the mistaken configuration change limited communication between DNS servers on the Internet and Microsoft’s DNS servers, causing may sites to be unreachable. Those with access to the numeric IP addresses were able to access the sites throughout the apparent outage.

Microsoft removed the configuration changes to the router configuration at 5 p.m. Wednesday.

Microsoft reported that all of its sites were once again available Wednesday evening. – Scott Bekker and Isaac Slepner

About the Author

Scott Bekker is editor in chief of Redmond Channel Partner magazine.

Featured

  • How To Replace an Aging Domain Controller

    If the hardware behind your domain controllers has become outdated, here's a step-by-step guide to performing a hardware refresh.

  • Azure Backup for SQL Server 2008 Available at Preview Stage

    Microsoft added the option of using the Azure Backup service to provide recovery support for SQL Server 2008 and SQL Server 2008 R2 when those workloads are hosted on Azure virtual machines.

  • Microsoft Suggests Disabling Old Protocols with Exchange Server 2019

    Exchange Server 2019 with Cumulative Update 2 (CU2) can help organizations rid themselves of old authentication protocols, which constitute a potential security risk.

  • Microsoft Previews New Edge Browser on Windows 7 and Windows 8.1

    Microsoft announced this week that it has released previews of its Chromium-based Microsoft Edge Web browsers for use on Windows 7, Windows 8 and Windows 8.1 systems.

comments powered by Disqus

Office 365 Watch

Sign up for our newsletter.

Terms and Privacy Policy consent

I agree to this site's Privacy Policy.