Diagnosing the Diseases of DNS

Network troubleshooters soon learn that the first place to look when the network stops working is DNS... and soon after that, they learn that the in-the-box DNS troubleshooting tool, nslookup, is a pretty basic answer. So if keeping DNS working is part of your job, don't miss this "beyond the basics" DNS troubleshooting session originally created by Mark Minasi. We start with "dig," the nslookup replacement that is a must-know for DNS techies. Then we see how to give your troubled DNS queries a thorough workup with Network Monitor (even if you've never used Netmon), where you'll be able to find out why those dynamic updates aren't happening. From there, get the scoop on "EDNS," a feature of DNS servers since 2003 that has been blamed - wrongly - for a host of DNS ills. After that, see how to take your DNS system's pulse with DNSLint, a free, not-to-be-missed utility. Then see how to understand what those DNS logs are REALLY saying. Attend this talk and you'll soon be known as "Doctor DNS!"