April 2021 - DNS.COMPUTER/blog

NAPTR record explained

April 21, 2021February 15, 2023 Martin Pramatarov No Comments

DNS, DNS records

The NAPTR records are not as commonly used as A DNS records, but they have an important purpose: linking servers and users’ addresses in SIP.

What is the NAPTR record?

NAPTR DNS record is a Name Authority Pointer record. It is a type of DNS record that serves to map servers to the users’ addresses in the so-called Session Initiation Protocol or SIP for short. The NAPTR records, together with another type of DNS record called SRV records (service records), allow complex rewriting of rules that provide new uniform resource identifiers (URIs) or domain labels. Depending on the flag of the newly created URI or domain label, it could be used in the following query for a NAPTR record or directly as an output of the entire process for URI mapping.

How to create a NAPTR record?

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What is Round-Robin DNS?

April 13, 2021July 20, 2021 Martin Pramatarov No Comments

DNS

Round-Robin DNS is the simplest solution that you can apply to create a DNS load balancing for your domain. With Round Robin, you can manage the DNS traffic in a way that will utilize your authoritative name server and redirect the traffic, reducing the stress from a single point (direct to multiple web servers).

What is load balancing?

Load balancing is a method for optimizing the network performance by utilizing a particular algorithm to administrate the traffic between multiple servers. The traffic management criteria could be different – the IP address of the visitor, the current occupation of a server, weighted loading balance that depends on the servers’ capacities, and more.

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How to use Linux MTR command?

April 5, 2021July 20, 2021 Martin Pramatarov No Comments

Commands

There are plenty of programs for network diagnostic. You might wonder, do we need one more?

If you want to trace the route of a query, yes! The MTR command could slightly outperform the traditional Traceroute command and give some more data, so it has a reason to exist.

What is MTR command?

MTR comes from Matt’s traceroute. First written by Matt Kimball in 1997 and later updated with Roger Wolff’s help, this is software with CLI that helps you see the route of a query.

It is based on the traditional traceroute command, but it presents each of the hops on the way, with a table-like view and data like data loss, amount of packets sent, the time of the return of each hop.

MTR command syntax