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Tag: Dig

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One of the most powerful tools available to anyone working on their site during a migration is their computer's "hosts" file. The hosts file is used to map domain names to IP addresses, and can be used as an alternative to DNS. It also allows you to specify the IP address to which a website resolves on your computer, regardless of what may be published in the site's DNS zone file.

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What Is Reverse DNS?

The purpose of DNS is typically used to resolve a domain name to an IP address. This act is known as a forward resolution and is performed every time you visit a site on the internet. Reverse DNS (or rDNS), as its name implies, is a method of resolving an IP address back to a domain name.

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Although the term DNS zone delegation may seem new to you, you have been using zone delegation without even realizing it. When you tell your domain’s registrar what nameservers you are using for a particular domain, you are delegating the zone for that domain.

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Whenever making DNS changes, lowering your TTLs (Time To Live) 24 hours ahead of time will reduce the amount of time that your change takes to propagate.
This article assumes that you are running BIND on a Linux server, that you already have an understanding of what DNS is, the different types of DNS entries, and how DNS works. Please note: The incorrect editing of your zone file can take your site offline. All editing must be done on the authoritative nameservers for the given domain.

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Now that you know how to SSH into your server it is important to familiarize yourself with some basic command line tools.

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How to Understand and Modify MX Records

Posted on by Jay Allen | Updated:
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MX (Mail eXchanger) records are like an address for your domain’s email. The MX record tells the rest of the internet where to send your email.

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The dig command is a command that is used for querying DNS name servers for information about host addresses, mail exchanges, name servers, and related information.

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