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Articles by James Kehr
Resolve-DnsName vs. nslookup in Windows
Blog Post …Or Choosing the Right Tool for Accurate Windows Name Resolution Diagnostics Oh boy, here we go again. The last time I talked about a networking tool, the infamous iPerf3 article, I kicked up a hornet’s nest online. This one should not be controversial. I hope. The choice of tool you pick to diagnose name resolution, such as DNS, inside Windows can impact the accuracy of your troubleshooting.
Three Reasons Why You Should Not Use iPerf3 on Windows
James Kehr here with the Microsoft Commercial Support – Windows Networking team. This article will explain why you should not use iPerf3 on Windows for synthetic network benchmarking and testing. Followed by a brief explanation of why you should use ntttcp and ctsTraffic instead. iPerf3 is owned and maintained by an organization called ESnet (Energy Sciences Network). They do not officially support nor recommend that iPerf3 be used on Windows. Their recommendation is to use iPerf2.
NCSI Change Notification
James Kehr from the Windows networking support team here with a public notification. There is a service in Windows called the Network Connectivity Status Indicator, or NCSI for short. Please do not mistake this for NCIS (Naval Criminal Investigative Service). NCSI is the Windows operating system service that determines whether your computer is connected to the Internet, or whether you need to sign into a captive portal to access a wireless network to reach the Internet.
Re: SMB and Null Sessions: Why Your Pen Test is Probably Wrong
Doing a net use \\dc1\IPC$ "" /user: against a Server 2012 R2 domain controller returns The command completed successfully.
What's QUIC?
Aug 25 2021 06:58 AM James Kehr here with the Windows Networking Escalation Engineering team. Today’s topic is the newly published QUIC protocol. This is a quick discussion, all puns intended, about why QUIC is important to the modern internet. Back in the old days, about the mid-1990’s, when the Internet was new and the Wild Wild Web was a better fit for WWW than the World Wide Web, Internet connections were really slow.
SMB is Dead, Long Live SMB!
Hello again, James Kehr here with another guest post. Titles are hard to do. They must convey the topic to the reader while being both interesting and informative, all at the same time. Doing this with a technical article makes life even harder. Now imagine my dilemma when starting an article about SMB1 behaviors in modern Windows. Think about that for a minute. Go ahead. The article will still be here.
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