Tag: DNS

​DDoS-protected DNS service: Why do you need it?

If you are checking what DDoS-protected DNS service is, you probably already suffered from a DDoS attack. Now, they are more common than ever and damage online businesses. They might stop your server when you needed it the most and cause severe losses. It is clear that you need a way to stay safe and keep your online business running. You need DDoS protected DNS service! 

​What is DDoS protected DNS service?

DDoS protection or DDoS mitigation service refers to an additional DNS service that combines different tools and techniques to check traffic and stop DDoS attacks. The DDoS attacks are strong waves of traffic organized by cybercriminals that try to unstable your servers and make them incapable of responding to normal clients’ requests. 

What one protected DNS service should do is: 

  • Analyze the traffic deeply. Understand the normal patterns of the traffic and use them for comparison. 
  • Separate traffic. Understand what is human traffic and what is machine traffic. 
  • Filter. Filter the incoming traffic based on whitelisting or blacklisting and other parameters. The protection can distinguish and stop bad traffic.  
  • Monitor. Monitor the whole DNS traffic. If the system spots a strange pattern, it could activate different behavior and take actions to stop a potential DDoS attack. So, understanding the traffic is vital. 
  • Distribute the traffic. In some cases, just the load balancing could be enough to distribute the malicious traffic between the DNS server and resist the attack. 
  • Activate Failovers if needed. If one or more servers go down, it could notify you about the event and redirect the traffic to the rest of the DNS servers. Automatically, without the need of a human operator. 

​Why do you need DDoS protected DNS service?

  • Less downtime. If you have DDoS protection, your servers will resist a lot more to DDoS attacks and experience significantly less downtime. Your visitors will still be able to access your application or website. 
  • Good performance, even under attack. The distribution of traffic that a DNS service provider can offer you should be enough to manage the traffic well. So well, in fact, that your application or website will still be available and without a significant penalty in productivity. 
  • It will be more beneficial. Yes, downtime costs and it costs a lot. How much does a minute of it cost for you? What about an hour or a whole day? Compare this number to around 100 dollars per month, and you will see that DDoS-protected DNS service is really worth it. 
  • It is easy to manage. Don’t get me wrong, if you are not familiar with DNS, it might be a bit hard, but if you are, it will be very simple. Set it up once, and the monitors and failover mechanism could run almost 100% by themselves. Only if the attack is really strong, you, your IT team, and the customer service of the DNS provider will need to fight the DDoS attack together. 

​Conclusion

DDoS-protected DNS services are getting so common as the SSL/TLS certificates for the websites. They are not a must, but pretty much everybody who has a large e-commerce site or an important application gets it. Better protect that suffer downtime and wait many long hours until your domain gets accessible again. 

Leave a Comment

Introduction to Anycast DNS

Anycast DNS explained.

Through Anycast DNS, several servers that are located in different geographical points can provide the same IP address. The DNS data for your domain name is duplicated on more than one server. You are able to choose a specific number of servers, depending on your needs. That way, your overall presence is going to be better.

When you are using Anycast, the most nearby server is going to answer the request of the user. In case one of your servers is offline due to maintenance or down for some reason, your website is still going to be reachable. The request will move to the second closest and available DNS server to resolve. As a result, the user’s request is going to be answered faster. Also, the overall experience is going to be improved in terms of loading time, waiting for a response, and so on.

How does it work?

Anycast network routing can route incoming requests over various data centers. The requests arrive in a singular IP address associated with the Anycast network. So, the network spreads the data based on a priority method. Choosing a particular data center will typically be adjusted based on reducing latency and selecting the data center closer to the requester. 

Advantages

  • Better uptime. It is possible for a server to fail, but the chance of a group of servers to fail at the same time is very low. So, your website is going to have better uptime, and your users could access it at any time.
  • Faster response time. The waiting time is way shorter when your servers’ responses are fast. Less potential clients are going to abandon your website.
  • Improved security. You can rely on other servers in case one of them gets compromised.
  • Rank on search engines. User experience includes waiting for a response, loading time, etc. Search engines don’t miss to rank better or worse your site based on these factors.

Anycast vs. Unicast DNS Routing

  • In Unicast DNS routing, the DNS resolver, an element on the DNS server accountable for discovering the authoritative DNS record for the demanded hostname, can get a list of many DNS name servers. It searches on the first one on the list. Then waits till it replies or there is a timeout, and then it is able to try the next on the list. This can cause high latency.
  • In Anycast DNS routing, resolvers are configured with only one anycast address for each group of name servers. That way, the latency is eliminated. The timeout delays with a non-responsive nameserver do not happen. Anycast routing automatically excludes unreachable points of presence (PoP). The DNS resolver is always routed to the closest and well-performing DNS server.

Why use Anycast DNS?

In case you have a website, service, or app, you probably want reliability and speed in each location. Nobody wants angry customers. With Anycast DNS, you achieve excellent performance at various places and handle the traffic effectively. The better network performance leads to more satisfied clients and then probably to more sales.

Leave a Comment

GeoDNS service – Everything you need to know

With GeoDNS service, you can accomplish remarkable results and drop the waiting time for your clients based on their location. No matter where your users are placed in the world, you can make your domain resolution much faster for them.

What does GeoDNS service mean?

GeoDNS service is usually a paid feature that can be found in the portfolio of the bigger DNS providers. Its purpose is to determine where are the users’ IP addresses. Afterward, it points them to the nearest server. Thus, it is often applied as a geographical routing method, which can assist with reducing the stress on an individual server. In addition, it routes the traffic to several servers, and it is a load balancer.

If your business has a worldwide presence and you desire to provide better performance to your clients, you should consider a GeoDNS service. It will ensure an excellent experience for the visitor of your website.

How does it function?

If you want to use the GeoDNS service, you will have to find a DNS provider supporting Geolocation. After you implement it and a user’s query is received, the DNS server will search for its location. That happens through the user’s IP address. DNS reviews it, and it will scan in the database for the location. Then the name server assigns a pre-configured record, which is defined explicitly for the region from where the query comes from.

When once GeoDNS identifies the location of the query, it will respond with a record configured especially for its location .

To send visitors to the best server and closest location, it uses DNS GeoIP searches. So, all servers will hold several IP addresses for the identical domain.

For who is it intended?

All kinds of businesses can benefit from GeoDNS. Small websites that want to grow also probably would like to have it. The biggest need for operating things smoothly would be for large companies.

There is a group of companies that can get the most out of it. For example, international organizations handle significant amounts of traffic or content platforms, which need to deliver to a global audience, and e-commerce, which are always seeking high uptime to secure profits.

Why is it beneficial to use the GeoDNS service?

When you set up a GeoDNS service, a lot of benefits will influence your business.

Moreover: 

  • It is not complicated to configure GeoDNS.
  • Better SEO, faster response and loading time, 100% uptime, and higher speed are key benefits.
  • You have more choices, and it is easier to manage the traffic. By setting some records on the DNS control panel, you can direct traffic to a local country or a different state.
  • With GeoDNS, you can set limits or break them to access the content. So your visitors are going to be capable of reaching your content, no matter their location.
  • Your website is going to be available and not disrupt by any maintenance or daily tasks. Even shutting down a server to update it or change it is not a problem. You have many options to serve all requests and to re-direct the traffic.
  • Congestion on particular network points is going to be finally avoided.

Leave a Comment

Fully Qualified Domain Name (FQDN) explained.

What is FQDN?

FQDN is the short acronym for Fully Qualified Domain Name. With it, you are able to see precisely the most full name of a specific domain name. And that refers not only to websites but also to servers. The Domain Name System (DNS) is created with a hierarchy order. It starts from the top, which is the root, then TLD, after that the domain, and the last is the specific hostname.

Here is the full syntax of a fully qualified domain name (FQDN):

hostname. domain name. TLD 

([hostname].[domain].[tld].)

Let’s view an example of a fully qualified domain name (FQDN):

mail.google.com. 

movies.disney.com.

ftp.microsoft.com. 

Be aware that the dot “.” (root), which is last, is often neglected. Usually, the fully qualified domain names end with the TLD. However, there are cases in which you will need to add it. That depends on what software you are using.

The Fully Qualified Domain Name is suitable when you want to view where precisely an object exists in the Domain Name System hierarchy.

Elements 

Here are the 3 elements of Fully Qualified Domain Name formatting. 

  • First is the TLD (Top Level Domain) – It is represented with the ending signs that we can see in an FQDN. Commonly 2 or 3 characters, such as .com, .edu, .net etc.
  • Subdomain – It is the domain that we can observe below the Top Level Domain. For example, Domain.com.
  • Hostname – It is represented with the symbols placed at the beginning of the FQDN. The most popular example is www in www.domain.com. A domain owner can generate many hostnames as they are associated with a subdomain. For example:
    • ftp.domain.com
    • mail.domain.com
    • www.domain.com

How to check the FQDN?

If you want to check if your device has an FQDN or its hostname is an easy task. It doesn’t matter if you are using a Windows 10, Linux, or macOS device. 

On Windows 10

  1. From the start menu, open your “Control Panel.” 
  2. Inside the Control Panel, open the System. 
  3. Inside the System, view the “Device specifications” and search for the “Device name”. 
  4. Next is the FQDN. 

On Linux 

  1. First, open the Terminal application. 
  2. Simply write this command: “hostname -f.”
  3. Press Enter, and you will see the FQDN. 

On macOS:

  1. First, open the Terminal application.
  2. Write down the command: “hostname -f.” The option “-f” means full. 
  3. Press the Enter, and you will see the FQDN. 

Why do you need FQDN?

The FQDN represents a unique address on the Internet. It is vital to the experience online. Imagine it, like you don’t have an FQDN. It is like you don’t have a website for people to visit. 

You will need FQDN if you want to install SSL certificates. This is because most websites are expected to have such a feature. 

With FQDN, you can access domain services, for example like email and File Transfer Protocol (FTP). If you want to connect a domain name email to an email app on your device manually, you will need the FQDN. 

Leave a Comment