DNS outage: What does it mean?

Definition of DNS outage

DNS outage can give anyone who is affected a headache. In addition, sites with issues can lead to a poor user experience and a probable loss of revenue for the company.

DNS is the abbreviation for Domain Name System. It’s a web directory that connects IP addresses to domain names. Furthermore, every website has a unique IP address. Therefore, users can visit a website by entering its IP address. They are, nevertheless, difficult to recall. As a result, the majority of individuals utilize the domain name instead.

Users are directed to the correct location via DNS servers, which allow web pages to load correctly. When you can’t connect to an IP address, DNS problems occur. This type of disruption usually happens when your Internet or network connection goes down.

In a nutshell:

When potential visitors enter your site’s name (domain name) into their browser and are not redirected to its IP address, this is referred to as a DNS outage.

Why does it happen?

A variety of factors can trigger it. Among them are the following:

  • The upkeep of authoritative name servers. As part of routine maintenance, updates or reboots are occasionally required. This prevents the server from responding to DNS requests.
  • Configuration errors DNS outages can be caused by various human errors during the DNS configuration process. Examples are script errors, incorrectly typed IP addresses, firewall configuration issues, and so on are examples.
  • DoS and DDoS attacks. Distributed denial-of-service attacks are divided into two categories. DoS and DDoS attacks aim to prevent a service from being provided. If they accomplish, you may suffer a DNS outage.

How to prevent DNS outage?

Yes, avoiding DNS downtime is possible. How? You can employ the following techniques:

  • Implement DNS load balancing. This is an effective method of distributing traffic among servers. When working, it considers factors such as the number of active connections, connection time, etc. DNS load balancing employs two or more servers and manages traffic so that servers aren’t sluggish or overworked and have roughly the same amount of work. It’s a great way to deal with traffic spikes, which can be natural or the result of malware activity. It boosts web performance while reducing security risks and downtime. If one of your servers fails or is hacked, your clients’ requests will be handled by another.
  • Look for a DNS service that serves as a backup (Secondary DNS). You already have a DNS service provider (Primary DNS). You could hire a separate provider and set them up as Secondary nameservers using their various Secondary DNS servers. A copy of the zone file and DNS records will be stored on these servers. As a result, they’ll be able to reply to DNS requests the same way as Primary DNS does. You’ll have a backup in case the final one goes down.
  • Service for defending against DDoS attacks (DDoS protection service). Advanced and continuous monitoring, firewalls, software, hardware, and DDoS deflation, among other things, are used to absorb the attack.

Conclusion

A DNS outage is the equivalent of a heart attack for your online business. Don’t let this halt your operations and harm your reputation. Furthermore, be aware of the reasons so that you can prevent them before they happen!

CDN: What is it and how to create it?

CDN has a stronghold on all of us! We are all users, not just business people, and we engage with CDNs every day. Without it, content delivery would not be as efficient as it is now. Each image, video, content, etc., is served via a CDN. If this got you excited and want to learn more, you’re in the right place. So, let’s start.

What does CDN mean?

CDN is the short abbreviation of “Content Delivery Network.” What does it mean? It’s a server network covering a vast geographic area and has specific server locations. The goal is to comprehensively protect the territory from which potential tourists may originate. 

Every server on a network is referred to as a PoP or Point of Presence. This is because they all have data for users of specific locations in their cache memory. It’s a service that you can use in addition to your primary web hosting. 

In what way does it work?

The principle is straightforward. DNS resolvers are on their way, analyzing the DNS request. They will provide the IP address of the closest cache server based on the request’s source. Some service providers refer to them as delivery nodes. Those DNS servers are strategically located in various areas. You can have numerous depending on your DNS provider, and you may be able to place even more in your most critical location.

Depending on your provider, you can employ a service GeoDNS instead of standard DNS. It allows you to assign specific IP addresses to different locations. You won’t send all of your traffic to the same place this way. You’ll be able to identify the required quantity of web hosting servers.

How to create a CDN?

If you wish to create even a primary content delivery network, you’ll need the following items:

  1. To begin, you’ll need a domain name or a subdomain.
  2. Second, there should be at least two servers in different places. You can use virtual or dedicated servers.
  3. Last but not least, there’s the GeoDNS utility. When you use it, visitors who request the domain are routed to the server that is nearest to them.

Why is it beneficial?

CDN is very useful. Here are some of its most significant advantages:

  • It helps to handle high loads of traffic (load balancing) efficiently. So, it aids in efficiently handling heavy traffic loads, surges, and network congestion. It can stand up to a lot of traffic without breaking down.
  • It protects against DNS downtime or also known as DNS outage. Using Anycast DNS, you may improve the availability of your CDN service. For instance, if a server goes down due to routine maintenance, a failure, or an attack, the requests will be routed to another server. 
  • CDN could increase the speed. Because content delivery network PoPs are located on IXPs, you benefit from increased speed and a strategic location. All of a visitor’s questions will travel a lot less. A shorter distance equals a speedier outcome.

Conclusion

The speed of a website is one of the most essential factors in determining its effectiveness. You might receive performance improvements and a better user experience using CDN. If you give it a chance, it will not disappoint you. So, please don’t spend any more time and put it into action in your system.