Posted in DNS attacks Network

What is DNS tunneling?

Do you know how dangerous and damaging DNS tunneling could be for your organization? If not, no worries. In this article, we will explain that. In addition, we will give you more information about its purpose, how it functions, and the prevention methods. So, let’s not waste any more time and get into business.

Meaning of DNS tunneling

DNS tunneling is a malicious and complex attack. Its purpose is to send DNS requests to the attacker’s server, giving the attackers a covert conduit for command and control and a route for data espionage. The cybercriminals breach the target DNS server and remotely take over management using data payloads.

How does it function?

For internal employees to access external websites and outside users to locate their websites, businesses permit DNS traffic to get across their firewall. This characteristic is exploited by DNS tunneling, which uses DNS requests to set up a command and control channel for malware. Outbound DNS traffic can exfiltrate sensitive data or deliver answers to the malware operator’s requests, whereas inbound DNS traffic might transmit commands to the malware. Because DNS is a fairly adaptable protocol, this works. Because DNS requests are made to seek website domain names, there aren’t many constraints on the information they can contain. These fields can be used to carry sensitive information because nearly anything can be used as a domain name. These queries are intended to be sent to DNS servers under the attacker’s control, enabling them to accept the requests and provide the necessary DNS answers.

To sum up the process in three steps, it looks lite this:

  1. First, hackers control a domain that links to a server that has malware running on it.
  2. The hacker uses a server that has been compromised with malware to look for the attacker-controlled domain.
  3. The DNS resolver creates a tunnel between the attacker and their target as it routes the query, enabling them to gather information, take over the server remotely, or carry out other attacks.

Ways to protect your organization against DNS tunneling

Is defense against DNS tunneling attacks possible? Yes, it is the answer. How? We’ll examine the two primary approaches.

  1. The first step is to put a firewall system in place. This may be the best method of protection against the DNS tunneling assault. Why? Because all unwanted communications can be instantly detected and stopped using this technology.
  2. The second is to keep an eye on DNS traffic (DNS Monitoring). This is another clever tactic. Why? Because you’ll be able to keep an eye on DNS traffic and be informed of any activity that could be detrimental. This can help you lessen the risks connected with DNS tunneling.

Conclusion

Since DNS was originally designed for name resolution rather than data communication, it is frequently overlooked as a threat to malicious information exchange and data exfiltration. Because DNS is a well-established and trusted protocol, attackers know businesses rarely check DNS packets for malicious activity. As a result, DNS is less important, and most enterprises focus their resources on slicing up web or email traffic because that’s where they think attacks frequently happen. DNS tunneling must be generally found and prevented through continuous endpoint monitoring.

Posted in Network

Free Monitoring service: Advantages & Disadvantages

Free Monitoring service – has more cons than pros? If you want to find this answer, you come to the right article. Today, we will first explain what the purpose of this service is, and then we will take a deep look at its main advantages and disadvantages. Finally, we will provide a quick view of where you can benefit from it. So, let’s start.

Free Monitoring service – complete explanation

The Monitoring service is an invaluable tool. It gives you a lot of information about the state of your servers, which you use for things like web, email, DNS, and other things.

It allows you to monitor and understand the status of your servers in real-time. If you regularly monitor your network, you will be able to detect numerous issues such as component failure or excessively slow traffic. Additionally, if a problem emerges, a service like this will automatically notify you by email, text, or another mechanism like webhooks.

Overloaded routers, server failures, and network connectivity issues are all detected by the Monitoring service.

Advantages 

  • Free service – Yes, the first benefit of this service is that it is absolutely free. You don’t need to pay anything for it. 
  • Receive real-time notifications. When your website goes down, you’ll get rapid uptime notices so you can get it back up and running as soon as possible.
  • Monitor from various PoPs throughout the world. With several locations, you can ensure that your clients have access to your website and that response times are acceptable all over the world.
  • Cost-effective solution. With zero costs, you have a reliable service.
  • Increase the Network stability. Yes, by implementing it, you are more safety, because you could monitor your traffic and, if something goes wrong, to take action.

Disadvantages 

  • Limited functionalities. The first drawback of this service is that the features that it offers are not enough for a massive amount of traffic, for example. And if you want fore functionalities, you need to upgrade to Premium Monitoring plans.
  • Not every interface is user-friendly. Very often, the system is made complicated and sometimes difficult to operate. 

Where can you benefit from the Free Monitoring service?

If you are interested in this service and want to use it, you can quickly obtain it. How? Initially, it would help if you are looking for a reputable and dependable provider of this service. Then, check ahead to see if it is truly free and what benefits it provides. Finally, simply register and enter the necessary information to make this service work.

Conclusion

Finally, the Monitoring service assists you in troubleshooting issues with your services such as web, DNS, email, and so on. Additionally, by simply displaying if a server is up or down, such a service can help to improve the reliability of your network. This feature is available from a variety of DNS Hosting providers. So, instead of wasting time, make use of it by selecting the most outstanding service provider. Best of luck!

Posted in Internet Protocols Network

What is IPv4 used for?

What exactly is IPv4?

In the early 1980s, the concept of IPv4 address type was created. Even if a new version of IP addresses is available, IPv4 remains the most popular among internet users.

Internet Protocol version 4 is the foundational technology for connecting all devices to the Internet. A numerical IP address, such as 45.17.98.65, is assigned to a gadget when it establishes a connection. A data packet comprising both devices’ IP addresses must be transferred over the network to transfer data via the Internet from one device to another.

Syntax of an IPv4 Address

Each group of four integers in decimal format is separated by a dot in IPv4 addresses. As a result, the phrase “dotted decimal format” was coined. Because each set is made up of eight bits, it is called an ‘octet.’

An octet can contain any integer between 0 and 255. As a result, the IPv4 address range extends from 0.0.0.0 to 255.255.255.255. There are two elements to an IPv4 address: the network part and the host part. These components are identified using a subnet mask.

IPv4’s Characteristics

IPv4 has the essential specifications:

  • Allows for creating a basic virtual communication layer that may be used across a variety of devices.
  • Provides video libraries as well as conferences.
  • It necessitates less memory and makes it easier to recall addresses.
  • Connectionless Protocol
  • Millions of gadgets now support the protocol.

Disadvantages

The fact that IPv4 has been there for nearly 40 years does provide a concern. The IPv4 address space is limited to 4.3 billion addresses, which is quite impressive. And in the early 1980s, this was considered far more than sufficient. However, here are its main cons:

  • Inadequate internet routing
  • IPv4 addresses are nearing the end of their usefulness.
  • High system management costs, as well as complexity and slowness. 
  • They have no security features
  • They’re also time-consuming

Is IPv4 still necessary?

Yes, we absolutely do! However, we can safely claim that we are still a long way from fully transitioning from Internet Protocol version 4 to version 6 (IPv6). It is a time-consuming and resource-intensive procedure. Nevertheless, network administrators will have to cope with both technologies in the near future, so don’t forget about IPv4 just yet!

Conclusion

The Internet Protocol version 4 was created with the goal of allocating about 4.3 billion IP addresses. It was regarded as a big address area in the early days of the Internet, and there was nothing to be concerned about. Internet Protocol version 4 is managed and monitored by the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned Names and Numbers (ICANN).

The rapid expansion in internet users, as well as the widespread use of network devices and servers, may have had an impact on IPv4 address numbers. For simplicity of use and integration into human life, every digital gadget requires the IPS. As a result, computers, smartphones, automobiles, and other electronic devices have increased the demand for more IP addresses, which was not anticipated at the outset.