Tag: DNS

NSlookup command – what is it?

Posted on By Martin Pramatarov No Comments on NSlookup command – what is it?
Commands

What is the NSlookup command? The NSlookup command is still a popular tool with a command-line interface for DNS probing. You can use Nslookup commands for checking the domain name, its IP address, or different types of DNS records. It has been around for a long time as a part of the BIND software. It … Read More “NSlookup command – what is it?” »

Why do we need to use a DNS TXT record?

Posted on By Martin Pramatarov No Comments on Why do we need to use a DNS TXT record?
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.

Read More “Why do we need to use a DNS TXT record?” »

Ensure mail delivery with DNS SPF record

Posted on By Martin Pramatarov No Comments on Ensure mail delivery with DNS SPF record
DNS, DNS records

There is nothing more frustrating than not been able to send emails correctly. You want to reach to clients with new offers, contact suppliers for additional materials, inside the company communication, and all with problems! What you need is to fix all the issues and missing configurations. Ensure email delivery with DNS SPF record and a few more DNS record types.

What is the DNS SPF record?

Domain Name System Sender Policy Framework record, or DNS SPF record for short, is a DNS record that provides important information about a domain name that indicates the outgoing mail servers it has.

If the MX records show which email servers should handle incoming emails for a domain name, the SPF records show which email servers should send emails on behalf of a domain name.

When you send an email to another person, like, for example, John@site.com, the incoming mail servers of site.com will first check your domain name. They will be searching for the SPF record and follow the rules that it establishes. Only if the SPF record is present, then your email will be received without been discarded or put into the SPAM box.

Read More “Ensure mail delivery with DNS SPF record” »

NAPTR record explained

Posted on By Martin Pramatarov No Comments on NAPTR record explained
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.

Read More “NAPTR record explained” »

Why use a Managed DNS provider? 

Posted on By Martin Pramatarov No Comments on Why use a Managed DNS provider? 
DNS, DNS services

The Domain Name System (DNS) is key for the modern Internet to work in the practical, efficient and reliable way we know it.

DNS matches domain names of websites with their IP addresses and vice-versa. Users just write a domain name in their browser. This browser queries the DNS server, which matches the domain name with its right IP address. 

What is managed DNS?

Managed DNS is a service model for clients to use DNS servers hosted by a specific provider to save their DNS data and activate Internet access to their website.

Managed DNS is a service operated by an expert DNS hosting companies.

Read More “Why use a Managed DNS provider? “ »

How does DNS Failover work? 

Posted on By Martin Pramatarov No Comments on How does DNS Failover work? 
DNS, DNS records, DNS services

Maintenance, updates of software, security measures… Websites owners try everything, and even so, bugs, hardware breakdowns, clustered connections, etc., could get their sites in trouble.

What about having a 24/7 monitoring that can be so aware to notify you about an upcoming problem? Or even better, this “vigilant” reacting on time to protect your site and pocket. 

What is DNS Failover?

DNS Failover is a useful and simple tool for making automatic updates of your DNS records in case of a failure. It is a convenient “B” plan for supporting your DNS, if “A” doesn’t work. 

Think about a common DNS record pointing a domain to a hostname or IP address but with the big advantage that you can define an endpoint, hostname, or IP address as a backup. This backup you create will be used only if the main is not available.

Read More “How does DNS Failover work? “ »

DS record explained

Posted on By Martin Pramatarov No Comments on DS record explained
DNS records

The DS record is a specific DNS record that is used to secure the DNS (DNSSEC). It uses cryptographic keys to verify zones from the DNSSEC chain of trust.

What is DNSSEC?

DNSSEC is the solution to secure, otherwise unsecured DNS. It is a chain of trust that uses a combination of public and private cryptographic keys to authenticate each step of DNS resolving processes. Starting from the authoritative name server, going through each step on the way, and checking that the DNS records to see if they are truly coming from the authoritative name server for the zone.

Read More “DS record explained” »