DNS outage: Meaning & Details

DNS outages can cause significant interruptions in business operations, so it’s essential to understand what they are and how to protect against them. A DNS outage, also known as a Domain Name System outage, is when an issue with the DNS server causes users to be unable to access the requested website or service. There are many different causes of a DNS outage, including malicious attacks, software and hardware errors, network congestion, and configuration errors. By having a DNS outage prevention plan and understanding the risks associated with DNS outages, businesses and individuals can ensure that they don’t experience any significant disruptions in their operations.

What is a DNS Outage? 

A DNS outage (DNS downtime) is a disruption in service on the Domain Name System (DNS), which is responsible for translating domain names into Internet Protocol (IP) addresses so that users can access online resources. An issue causes this outage with the DNS server, often due to an error, an attack, or a software or hardware failure. During a DNS downtime, users cannot access the requested website or service and often run into an error message. This can be a massive issue for businesses and individuals, as it prevents them from accessing crucial resources, services, and applications.

What Causes a DNS Outage?

There are many different potential causes of a Domain Name System downtime. One of the most common is an attack on the DNS provider by malicious actors, such as a DDoS attack, which floods the DNS server with too many requests and causes the system to become overloaded. Software or hardware errors can also cause a Domain Name System outage, as can an accidental modification to the DNS configurations resulting from human error. Additionally, a disruption in the power supply or hardware failure, such as a corrupted disk or memory, could also cause a DNS outage.

Another potential cause of a DNS outage is network congestion, when too much traffic is being sent or received at once, resulting in a backlog of data and an inability to process requests. In some cases, slow information propagation can also lead to a DNS outage, as the Domain Name System server may fail to recognize new changes to the system’s configuration. Finally, configuration errors due to incorrect setup or maintenance can cause a Domain Name System outage.

How To Detect a DNS Outage?

Detecting a DNS outage can be difficult, especially if you need to become more familiar with the inner workings of DNS servers and networks. But here are some of the most important ways to prevent your network against it:

  • Choose a reliable DNS service provider.
  • Back up (Secondary DNS) and test the DNS server system.
  • Implement authentication and data encryption.
  • Apply software updates to DNS servers and other methods.
  • Deploy Monitoring service tools and alerting systems.
  • Invest in security tools such as DDoS protection services.
  • Isolate internal networks from external threats.
  • Ensure secure configurations (DNSSEC) and limit access to the DNS server.
  • Regularly check for vulnerabilities in the system.

What are the most memorable DNS outages in history?

  1. The notorious “Dyn DNS” outage in October 2016 was caused by a massive DDoS attack, disrupting the internet for millions of people in North America and worldwide. 
  2. According to research from VeriSign, the average cost of a network incident caused by a DNS outage can be as high as $2.72 million. 
  3. Additive costs resulting from a Domain Name System downtime can include a 7-10% dip in customer satisfaction, lost time and resources due to troubleshooting, and decreased productivity or missed sales. 
  4. The United Nations estimates that each hour of lost internet connectivity can cost businesses up to $120,000 in lost revenue. 
  5. In June 2020, a significant outage occurred within the Amazon Domain Name System service resulting in downtime for millions of Amazon Web Services customers. 
  6. The peak DNS queries per second rate (DNS QPS) reached its highest levels when the pandemic hit, with over 1450 DNS QPS compared to the normal rate of 700-1000. 
  7. In October 2020, a significant downtime in Google’s DNS service caused service interruptions for services such as YouTube, Gmail, and Google Docs for several hours. 
  8. A recent report from Renesys estimates that 40% of global networks are vulnerable to DNS outages due to a lack of proactive prevention measures.


DNS outages can significantly impact businesses, so it’s essential to understand the risks and have strategies to prevent them. Ensure that you’re using a reliable DNS service provider, regularly update DNS software, and apply authentication and data encryption. Additionally, monitor and alert for any potential problems, use redundancy with other DNS providers to minimize the impact of an downtime, secure configurations, limit access to the DNS server, or isolate your internal networks from external threats. If a DNS outage does occur, you’ll be able to identify the source quickly and handle it properly. Having suitable measures in place can help your business to remain productive and secure.

Free Monitoring service – Everything you need to know

The goal of the Free Monitoring service

Once you’ve landed on this article, then you probably want to learn what a Free Monitoring service is. Okay, great. In the previous article, we explained what Heartbeat Monitoring is. Its function is to check the physical state of your devices. But do these two things have anything in common? The answer is yes. Free Monitoring service is a set of goodies through which you can do checks. That is, it can include various checks like Heartbeat Monitoring, DNS Monitoring, TCP Monitoring, Ping Monitoring, etc. 

So, we can say that the Free Monitoring service is a free resource through which you will get information about the state of your servers that you use for web, email, DNS, and other things. It allows you to track and understand the status of your servers instantly. In addition, regular network monitoring will allow you to spot various problems, including component failure and increased traffic. 

How and from where can you take advantage of it?

Find a reputable source if you want to take advantage of the Free Monitoring service. Examples of some of these are as follows:

  • The first trustworthy Monitoring service provider is UptimeRobot. It is a company that provides website uptime monitoring services. Plans for paid and Free Monitoring are both offered. 50 monitors and five-minute inspections are additional features of the Free version. It allows you to view the website’s performance in real-time! Using this tool, you may determine whether a specific keyword appears in the website’s HTML source.
  • ClouDNS is the following. For both large and small businesses, it provides both Premium and Free options. The Free Monitoring plan only allows for one monitoring check. Furthermore, around 80 monitoring locations can be found worldwide. The monitoring time also lasts for 10, 15, 20, 30, and 60 minutes. Therefore, you will get seven days of record retention if you use the ClouDNS Monitoring service. Additionally, this DNS Hosting business provides 24/7 live chat support.
  • Statuscake is the last provider on our list. It was founded in 2012 and had its headquarters in London. Like the other two, it has a Free and Premium plan. The Free program includes ten uptime monitoring checks with a 5-minute test interval. Additionally, you will be informed via email and platform reports if something goes wrong.

Advantages of implementing Free Monitoring service

  • Free of charge. Yes, this service’s primary advantage is that it is entirely free. You are not required to pay anything.
  • Receive notifications in real-time. You’ll receive prompt uptime notifications when your website is down so that you may restore it as soon as feasible.
  • Watch from a variety of PoPs throughout the globe. You can make sure that your customers can access your website and that response times are reasonable all over the world by having different locations.
  • Cost-efficient answer. You can get dependable service for nothing.
  • Improve the stability of the network. Yes, you will be safer by using it because you will be able to keep an eye on your traffic and act quickly if something goes wrong.


Let’s recap! Unquestionably, Free Monitoring is a valuable solution for your online business. It is better suited to companies with low to medium traffic, nevertheless. By seeking a reputable and competent monitoring company, you can make use of this service.

Heartbeat Monitoring: Definition & Benefits

Do you want to take advantage of Heartbeat Monitoring but don’t know how? Okay, no worries, you are in the right place. Why? Because in this article today, we will explore exactly this topic. So, first, we will begin with what Heartbeat Monitoring is, and then we will pass through what Monitoring service means. The next step is to review the main advantages of our topic. And finally, we will explain if it is easy to configure it and how to do it. So, let’s start.

Definition of Heartbeat Monitoring

For dependable service and an excellent user experience, Heartbeat Monitoring is essential. It also helps pinpoint problems with your services, such as web, DNS, email, etc. In addition, you get thorough information about the state of your servers thanks to it, and it makes it easier for you to identify and rapidly address various issues.

You may also keep an eye on and observe the health of your servers in real-time. This makes it simple to identify and address any issues, such as a specific component failing or extremely slow traffic.

Additionally, the Heartbeat Monitoring service sends out automated notifications. Therefore, you will be notified via email, text, or some other method if a problem arises.

Defining Monitoring service

Your team’s productivity will be greatly impacted if your IT infrastructure experiences any downtime because it will have a negative impact on how your customers are treated, which could lead to lost sales.

Therefore, the Monitoring service will aid in combating it. How? It will continuously monitor your IT infrastructure, notify us of any concerns, and enable us to take action before they have a negative impact on your organization. This will help keep your systems operational and your business stakeholders satisfied.

Advantages of Heartbeat Monitoring

  • It doesn’t miss a beat.
  • Checks at multiple locations
  • It is simple to use. Simple to configure.
  • Alerts you when your servers/devices go down
  • It comes with a set of additional monitoring checks.
  • An inexpensive solution

Is it easy to perform it?

Yes, it’s elementary. But first, you need to select a good Heartbeat Monitoring provider on the market. Some examples for them are Elastic, Cronitor, Site24x7, ClouDNS, Coralogix, etc. So, let’s get back to the question, “How and is it easy to perform it.” The steps are listed below.

  1. Select and enter the required information for your Heartbeat Monitoring to obtain the unique Ping URL.
  2. You must copy this URL and configure it for the server or any device you intend to test.
  3. When you do this, and your server opens the Heartbeat URL on a regular basis, your Monitoring check should return the status UP. It will be DOWN if you do not correctly enter the URL, your server is down, you have Internet problems, and so on.
  4. Examine and evaluate the performance reports.


In conclusion, we can say that this service is absolutely beneficial. It gives you additional security and is really easy and straightforward to perform. So, go ahead and reap the benefits.