June 2018
Intermediate to advanced
368 pages
11h 1m
English
Content preview from Managing Mission - Critical Domains and DNS
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Debugging Without Tears – DNS Diagnostic Tools
Debugging DNS issues can be tricky. There are numerous moving parts to any given DNS lookup, and because they occur under the hood and are abstracted away from the user-facing network functions, you have to know exactly where to look and what to look at to figure out what is happening.
Furthermore, it is not uncommon for users to suspect DNS problems when facing symptoms that are not related to DNS. Getting a "404 Not Found" page when you navigate to a website is not a DNS issue. Yet it is frequently reported as one.
What follows are various tools that can be used to isolate and diagnose issues. First, we'll look at command-line tools, and then at web-based ones.
In this chapter, we will cover ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.