DNS is great! It allows the Internet to exist. Without it, we have no other viable alternative to connect so many devices in one united web. Imagine a text document with all the IP addresses of all the host and connected devices in the world. And somebody that is manually editing each change, just impossible!
We have a DNS for managing this, but often, it experiences problems. If you have just a primary DNS server and no Secondary (backup) DNS servers, you could be in big trouble. If it gets attacked, your site won’t be reachable until it gets up again.
What is Primary DNS (Master DNS)?
The Primary DNS, also known as the Master DNS, is the one that has the original zone file. It has the DNS records, and all the changes happen inside this one. When you add records, you are adding them to the Primary DNS server.
What is Secondary DNS (Backup DNS)?
The Secondary DNS, also known as the Backup DNS or Slave DNS, is a recursive DNS server or servers that has or have a copy of the zone file. It will have a copy of the DNS records, but it will just copy the information from the Primary DNS. If you change any DNS record, you will need to wait until the Secondary DNS servers update. This depends on the values that were set inside the SOA (start of authority) record. Inside the SOA record, you can see the refresh rate and TTL value.
So, in short, the Backup DNS is a system of recursive DNS servers that has a read-only copy of the DNS records. The Secondary DNS will stay on, even if the Primary DNS is down, and will still resolve queries as long as the values inside the SOA record allows it (for a certain time until the data is not current anymore).
It is a good practice to have a Secondary DNS with a different provider. That way, you could have better chances to stay up in case of attack.
Continue reading Secondary (Backup) DNS – Why use it?
Now we are going to explore something that a few people know – DNS load balancing.
You have probably heard about cache plugins and CDN (Content Delivery Network). Now we are going to talk about another network element that increases the speed by managing the DNS requests faster than a single server. It will boast the first step of someone’s visit to a site and redirect the traffic for better performance.
What is DNS load balancing?
DNS load balancing is a technique for administrating the traffic of a hostname. Many of these DNS load balancers are smart. They use different criteria, analyze the traffic, decide to let it go or stop it, and redirect it to another server based on current load or another parameter.
Find out more information about DNS Load Balancing!
Continue reading DNS load balancing
Statistics about Distributed Denial of Service (DDoS) attacks’ growth and frequency around the world are scary. Nobody wants to experience them, but there is no way to deny, anybody can be targeted.
The time a DDoS attack can last is not a minor issue. Some have lasted a few hours, but others, days. Every hour your business is shut down means losses for you. Plus the cost for fixing the DDoS side effects on your site.
Continue reading What is DDoS Protected DNS, and do I need it?
Here you have 5 most popular DNS records. You will find them on your first day of managing a DNS. Each of them is extremely important for the right functionality of the DNS. There are many more DNS record types, but those 5 essential DNS records are a good start for the first contact with the DNS records.
Continue reading 5 most popular DNS records
Do you really need a Premium DNS hosting? Can you use a free DNS service, or do you need any DNS service at all? Honestly, it depends a lot on the size of your site and its traffic. If you have a really small size, light one, and you have very few visitors, you don’t.
Basics of DNS service
Continue reading Do I need a Premium DNS hosting for my website?
Business owners know the importance of choosing the best tools to work and keeping quality communication with every team member.
To be connected from anywhere, with the right tools to handle urgent situations, it is vital to boost business productivity.
What is G Suite (Google Workspace)?
Continue reading 5 Benefits of using G Suite for my business
Are you getting too tired of seeing how slow your site loads? We bet you have found Managed DNS as a solution to speed up your website’s performance. But it is far more than just a speed booster. Let’s see the top 5 reasons to use Managed DNS.
Multiple points of presence (PoP)
Continue reading 5 reasons to use Managed DNS
The security is, and it will be a constant concern for everybody, website owners, and users. Cybercriminals don’t stop hacking, so we can’t quit protecting our sites. Every upgrade or new development related to boosting security online is worthy of trying.
What is an SSL certificate?
Continue reading SSL certificate – 5 reasons to use it
Many articles are comparing different web hosting types like shared hosting vs cloud hosting or cloud vs dedicated, but it is rare to see local hosting. Can you host your website locally? Yes, you can host your site on a local computer and make it available online or use it for testing.
Why host a website locally?
Continue reading How to host a website locally?
Every time users request a website, and it takes a long time to be loaded, they leave! Website owners know that it could be that the server is busy or the server is located too far from the user. But users do not care and just abandon the site and maybe never comes back.
That’s called latency. A severe problem for website owners that, fortunately, can be fixed!
What is GeoDNS, and how does it work?
Continue reading GeoDNS explained
Speed, speed, speed! We all want our sites and applications to load as fast as possible. Each moment of delay might make your visitors go away. So one of the most common approaches to increase the speed of a website is to use a Content delivery network (CDN). But how to create a CDN?
What is CDN?
Continue reading How to create a CDN?