Digging for DNS answers on Linux

Dig is a powerful and flexible tool for interrogating DNS name servers. It performs DNS lookups and displays the answers that are returned from the name servers that were involved in the process along with details related to the search. System and DNS administrators often use dig to help troubleshoot DNS problems. In this post, we’ll take a deep dive into how it works and see what it can tell us.To get started, it’s helpful to have a good mental image of how DNS or domain name system works. It’s a critical part of the global Internet because it provides a way to look up and, thereby, connect with servers around the world. You can think of it as the Internet’s address book and any system that is properly connected to the Internet should be able to use it to look up the IP address of any properly registered server.To read this article in full, please click here …

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