DNS load balancing vs. Hardware load balancing

Martin Pramatarov / / Load balancing

Why do we need load balancing?

With the massive increase of the internet traffic each year, it is getting harder to provide a sustainable service for all the millions of clients without having some downtime. For this purpose, you need to apply a model of load balancing, that will reduce the load caused by the countless users trying to reach your website or use your application.

Another reason why you need to use load balancing is the rising number of DDoS attacks. To evade them you will need to spread the traffic to as many as possible servers that you have. That way, their combined efforts can resist the wave of high traffic.load balancing

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What is a Recursive DNS server?

Martin Pramatarov / / DNS

When you browse the internet, you don’t write IP addresses to go to the pages you want; you just write the domain. In the “backstage”, every request that you do, passes through a DNS query. It first goes to your internet provider’s recursive DNS server. If it can’t find in the cache, the information needed, it will continue to other recursive servers until it gets to an authoritative DNS server who can give the IP address of the required domain. Basically, it is a name server, that is a middle-man between you, the user, and the authoritative DNS server.

Tasks of the recursive DNS server:

1. Checks if the IP address is stored in the cache memory. There is a certain period of time, pre-defined by the domain’s owner called Time to Live or TTL. It says for how long the recursive server can hold the information. If it is still there, it will return the answer fast and won’t take further actions.
2. Searches for the IP address elsewhere. If it is not in the cache, it will continue the searching process until it gets to an authoritative server which has the information.
recursive DNS server

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How to resell DNS services? Add DNS to your product portfolio.

Martin Pramatarov / / DNS

Did you know that you can be an official reseller of our services? Yes, ClouDNS allows you resell DNS services to others and earn money. By doing so, you can help many people enjoy our competitive prices and excellent service.

Who can join this reselling program?

Many can benefit from it, but mostly it can add extra value to your hosting or domain business. You can seamlessly integrate our DNS services to your product portfolio and resell DNS. Thanks to the API that we provide, every business function is easily accessible and fully flexible.Resell DNS

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Most significant DDoS attacks in the recent years

Martin Pramatarov / / DNS

DDoS attacks are getting stronger, and they happen more often every year. With the technology advance, there are many more connected devices out there. Billions of mobile phones and many “smart” connected gadgets are easily hackable. As IoT (internet of things) is getting more popular, but not secure enough, this danger will keep rising.

DDoS Attacks

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TTL and how to check TTL

Martin Pramatarov / / DNS

TTL – Time to live is a value that signifies how long should the data be kept before discarding. It is commonly used in computers. In the Domain Name System, it has a value in seconds (86 400 for a day, 43 200 for 12 hours and so on) that shows for how long, should a record be kept locally, before you need to make a new query to get this information. The TTL is set separately for the different records. They are set in the authoritative DNS server and the recursive DNS will keep the information depending on the predetermined time. This process of temporary having the record is called caching and the temporary stored data – DNS cache.

TTL

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Тools – DNS trace, Ping, Traceroute, Nslookup, Reverse lookup

Martin Pramatarov / / DNS

In this article, we will use few different tools that will help you troubleshoot and monitor your DNS and network.

DNS tools

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DNS Spoofing (DNS poisoning)

Martin Pramatarov / / DNS

Cyber-threats are behind every corner. Recently we wrote about DDoS attacks, and how hackers are using your computer and many connected devices to create a network of bots who can bring down even the best-protected network. Today we will review another danger – DNS spoofing.

DNS Spoofing

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What is domain name resolution?

Martin Pramatarov / / Domain names

Shortest possible answer: domain name resolution is the process in which the internet users receive the address of the domain, they were looking for.

Let’s get into the details, shall we?

Domain name resolution

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Types of DNS records

Martin Pramatarov / / DNS Records

Do you know what types of DNS records are out there? If you don’t know them all, don’t worry, we will explain them all in brief. By identifying them, you can easily manage your DNS plan in the best possible way.

DNS records

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Why should you implement Managed DNS in your hosting company?

Martin Pramatarov / / DNS

Are you a hosting provider who is searching for new ways to improve the user experience? The competition always looks like they are one step ahead and you struggle to keep up. You can’t afford to renew your equipment so often, so you are looking for another option.
Have you checked the possibility to implement Managed DNS in your hosting company?
Not yet!? Let us show you why this could be an excellent chance for you.

Managed DNS

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