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John Paul Cook

Do you know your DNS server?

If you don’t know your DNS server is valid, you need to find out before July 9. The FBI found rogue DNS servers and replaced them with clean, safe DNS servers to protect the public. These safe, clean servers will be turned off on July 9, 2012. If your computer was compromised to use the rogue servers, it will stop resolving DNS queries on July 9 when the clean servers are turned off. The FBI has provided full technical details at This document lists the IP addresses of the rogue servers. The rogue servers were taken down. The clean servers use the same IP addresses that the rogue servers did. When the clean servers are decommissioned, compromised machines will be pointing to nowhere and thus be unable to resolve names. Of course, browsing by IP address will work without a DNS server. You can check the status of your machine by browsing to this address:

Published Thursday, July 5, 2012 6:40 PM by John Paul Cook

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About John Paul Cook

John Paul Cook is a database and Azure specialist in Houston. He previously worked as a Data Platform Solution Architect in Microsoft's Houston office. Prior to joining Microsoft, he was a SQL Server MVP. He is experienced in SQL Server and Oracle database application design, development, and implementation. He has spoken at many conferences including Microsoft TechEd and the SQL PASS Summit. He has worked in oil and gas, financial, manufacturing, and healthcare industries. John is also a Registered Nurse currently studying to be a psychiatric nurse practitioner. Contributing author to SQL Server MVP Deep Dives and SQL Server MVP Deep Dives Volume 2. Connect on LinkedIn

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