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Why is Anycast DNS essential for your network?

What objective does Anycast DNS serve?

A communication or routing technique called Anycast DNS makes it possible to send and receive data more quickly. Using this technique, a single IP address can be typed into several DNS servers worldwide. Any of them is capable of responding to the request. The intended outcome is for the server to react physically closest to the user. This greatly accelerates the response time (DNS resolution).

What advantages come with using Anycast DNS?

  • Simple to configure: Most Мanaged DNS providers make setting up an Anycast DNS simple.
  • DNS inquiries are answered quickly. There are many more DNS nameservers evenly scattered across critical areas. This will provide a quicker response to each request, regardless of its source. More is always better.
  • Load balancing. The nearest Anycast DNS server replies to the traffic. Numerous servers respond to the queries of neighboring customers. A weak network spot is prevented by avoiding using the same nameservers for all traffic. An Anycast DNS network’s load balancing ability enables it to withstand even DDoS attacks because the attacks are dispersed over the network.
  • Scalability. You may raise or decrease the number of Anycast DNS servers if you use a cloud-based DNS service. Simply switch from one plan to the next. With a small initial investment and a recurring monthly fee, you can have a robust network of servers.
  • Redundancy. You have a network of nameservers rather than just one, and since they all point to the same IP address, if one goes down, the recursive DNS server will keep looking for another Anycast DNS server that can answer DNS requests. The client won’t notice the delay when the server starts up again and can carry on as usual.

How does it perform?

A device that is connected to the Internet communicates with a server by using its IP address. The most basic kind of communication is one-on-one interaction. It’s alright, and there’s a possibility that DNS resolution will function. However, if only one server has the required information, individual requests will have to travel quite far to reach it (A or AAAA record). The user won’t receive the desired response if the server is down. There won’t be a response to the query.

Unicast DNS vs. Anycast DNS 

Unlike other DNS systems, Unicast DNS works differently. In contrast to the topic of our article today, DNS server data is maintained on-site at the DNS server’s physical location. This means that any devices that want to show your site will consult this server, independent of the user’s location. The response latency will therefore rise if your server is in Asia and the user is in Germany. The website would also be unavailable if your DNS server crashed or compromised unless you had a backup strategy. In contrast, if you use Anycast DNS, this won’t occur because you’ll be directed to the next closest server if the first one is unavailable.

​Conclusion

Anycast DNS, in general, is a method of keeping traffic local. You route it to the nearest instance, providing your clients with a quick and dependable service. Furthermore, it is simple to install and will improve your networking.

IPv4: What does it mean?

The topic of today’s article is exactly the IPv4. And if you desire to learn more about its definition, what it looks like, and how to check it, great! You are in the right place. So let’s not waste any more time and explore it!

Introduction to IPv4 

The fourth IP version is IPv4. On the Internet and other packet-switched networks, it is one of the fundamental protocols of standards-based internetworking techniques. In 1982, the Atlantic Packet Satellite Network (SATNET), a satellite network that was a part of the early development of the internet, implemented Internet Protocol version 4 for the first time. To this day, we still use it.

Structure

When a device connects to the Internet (whether it’s a switch, PC, or other devices), it’s given a unique numerical IP address, such as 5.8.33.73. Furthermore, IPv4 employs a 32-bit address scheme. Each section can have a number between 0 and 255, for a total of 4,294,967,296 (232) possible addresses. Each number represents an 8-bit field corresponding to one byte of an IPv4 address.

So the growing number of Internet users leads to the exhaustion of IPv4 addresses. That is also why IPv6, the new Internet addressing system, is being deployed to meet the demand for more Internet addresses.

How to check IPv4?

It is simple to find your IP address. A dynamic IP address is one that is constantly changing. The steps below will assist you in determining your computer’s IP address:

  • Linux

Begin by opening a terminal window. To check IPv4, use the commands “hostname -I,” “ip addr,” and “ifconfig.” These commands each return the Internet Protocol version 4.

  • macOS

Launch the Terminal application. Use the macOS Terminal command curl ifconfig.me to obtain your public IP address. To find the private Internet Protocol version 4 address, type ipconfig getifaddr en0.

  • Windows

To open the Command Prompt in Windows, go to the Start menu and type cmd. And after that, in the Command Prompt, type ipconfig and press Enter. The program’s output will include your IP address.

Conclusion

We might assume that IPv4 was the first Internet Protocol version to be widely adopted and that it accounted for the bulk of Internet traffic in use today. Perhaps IPv6 represents the present and IPv4 the past. We’ll gradually start saying goodbye to the current one and welcoming the new one.

Dynamic DNS: Why is it important?

Have you ever heard about Dynamic DNS and how important it is? If not, no worries. You are in the right place. Why? Because today’s article focuses on the significance of the Dynamic DNS, its purpose, and how it operates. So, let’s start exploring it.

Dynamic DNS purpose

Dynamic DNS (DDNS) automatically updates and modifies a host’s IP address. As a result, visitors will be able to access your website even if the IP address changes due to it.

DDNS is a simple solution that allows you to connect to your various hosted services when your ISP changes your IP address (IPv4 or IPv6). For example, let’s imagine you have a web hosting server, a database server, and a mail server, or you use your home network to connect your CCTV cameras to the Internet using DDNS.

Changing IP addresses makes it easier for ISPs to manage their networks. As a result, they only rent them to their customers for a limited period. Instead, they delegate this responsibility to a DHCP server for this purpose. As a result, when the time period expires, the clients are assigned a new IP address.

The way it works

DDNS works by mapping custom host names to specific network devices/resources. For example, let’s imagine you want to be able to view a security camera mounted on your front door from anywhere on the planet. Of course, you’ll need an IP address to achieve this, which will allow you to connect to the camera via the Internet.

If your ISP changes the IP address, the old IP address you used to access the camera will no longer operate.

When you use a DDNS service to map a fixed, custom hostname to a resource, you can be confident that you’ll always have access to it, even if the underlying IP address changes.

Why do you need to benefit from Dynamic DNS?

The key motivation is straightforward: making something available online via Dynamic DNS is less expensive. Yes, you can receive static IP addresses for each connected device, but at what cost? IPv4 addresses are becoming more costly and challenging to come by. Even if you pay for a DNS service plan, it will still be significantly less expensive than paying for static IP addresses if you’re curious.

Another critical factor to consider is that it is quite straightforward to use. Setting up DDNS on your router, for example, is comparable to setting up anything else. You go to the settings and fill in the required data. Creating an account on a DNS service and then creating a new host is, on the other hand, a reasonably simple and quick process.

In conclusion, Dynamic DNS is a more cost-effective and user-friendly option than purchasing static IP addresses.

Conclusion

DDNS is a fantastic service. Should you take advantage of it? It will save you money and function perfectly in most circumstances, so take it into consideration. Additionally, it may even be the sole reasonable answer to a problem in some situations. For example, suppose you wish to deliver services or connect and operate many devices, such as CCTV cameras, over the Internet. So yes, check it out. Good luck!