July 2021 - DNS.COMPUTER/blog

What is the Traceroute command, and how to use it?

July 18, 2021July 20, 2021 Martin Pramatarov No Comments

Commands

The Traceroute command is a network tool that helps you see the complete route of a query and identify problematic spots on the networks, such as slow or not responsive routers. You can use it through the Terminal with a simple “traceroute + domain name” command.

It is light, fast, and does the job it was designed for. The great thing is that you can find it on the most popular OSes.

What is the Traceroute command?

The Traceroute command is a simple software with a CLI interface that serves to show you each hop of a query from your computer to the destination – IP address or domain name. It races the route of a probe and gives back the result.

The query will travel through the internet, hoping from a router to another and finally reaching the destination. At each of the hops, your computer will send packets and get answers for them. That way, you will get statistics about each of the points, from your device to the destination.

Syntax of the Traceroute command

What is Reverse DNS?

July 14, 2021July 20, 2021 Martin Pramatarov No Comments

DNS

A Reverse DNS is usually a premium feature inside a paid managed DNS plan. It is a service that is mostly directed towards IP network owners and offers IP address to domain resolving. Other business owners might also be interested in it because that way, their emails have a better chance of not going to the spam folder.

Reverse DNS explained

Reverse DNS, also known as rDNS, does the opposite to a Forward DNS, which is to map IP addresses to hostnames. The purpose of the Reverse DNS is to provide a way to verify the IP addresses and confirm that they are related to a particular domain name. It is especially important when we are talking about the verification of mail servers or other services.

If you can’t verify, it is safer to mark it as dangerous, and this is what many servers could do if there is not Reverse DNS zone to be checked.

In short:

In Forward DNS, a domain name is pointing to an IP address where it is hosted.

In Revere DNS, An IP address is pointing to a domain name to verify it belongs to it.

How to start using Reverse DNS?

Why do we need to use a DNS TXT record?

July 7, 2021January 19, 2023 Martin Pramatarov No Comments

DNS, DNS records

Let’s explore one DNS record with multiple purposes – the DNS TXT record. It is used for various verification methods, and it is essential to the right mail server functionality.

What is a DNS TXT record?

The DNS TXT record is one DNS record type with multiple purposes like authentication, verification, mail policies, and more. The DNS TXT record is showing domain information to external sources.

The TXT record has a text field that can be filled with readable instructions for people or with instructions for computers like cryptographic keys and email instructions.

You can add multiple TXT records for the same DNS zone. They can have different purposes, and sometimes they can work together, like in the case of DMARC.

How to create a TXT record?