DNS

DNS

DNS cache – Definition

Definition of DNS cache

DNS cache is a temporary cache memory that DNS resolvers and other devices utilize to store information. The memory stores the DNS records that were first applied to the searched domain names. The IP addresses (IPv4 or IPv6) of domain names, information about their email server, their services, authentication and verification data, and more are all stored in these records. All of the data will be saved in the DNS cache. However, as previously stated, it will only be for a short time, as determined by the TTL (Time to Live) value issued to each DNS record.

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by Donny3 Min Reading
Cyber attacks, DNS

3 Most Common DNS attack types

The DNS infrastructure is a target to countless attacks. And when we say countless, we mean it. Just in 2020, there were around 10 million (data from NETSCOUT Threat Intelligence Report)! So, we are all under constant DNS attacks.

The 3 most common DNS attack types that you can suffer are the following:

1. DNS spoofing attack

The DNS spoofing attack (also known as DNS poisoning) is a very common DNS attack type that involves modified DNS records that the bad actor inserts inside the cache memory of the DNS resolvers. The modified records usually lead to a different IP address than the original name records. The visitors get redirected to the domain of the bad actor. There they can share sensitive data that could later be used for different illegal activities – stealing money or identity.

Suggested article: 5 DNS Attacks Types that could affect you

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by Donny3 Min Reading
DDoS protection, DNS, Network

Load balancing – Great solution for mitigating all risks

Our topic today is Load balancing. If you want to learn about its primary purpose, how it works, and why it mitigates all the risks, you are in the right place. So, let us begin by discussing the meaning of Load balancing.

What is Load balancing?

Load balancing in DNS is a method of distributing client requests across server computers by using domain setup. For example, the domain name might be associated with a website, email system, or any other Internet-based service.

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by Donny3 Min Reading
Cyber attacks, DNS, Network

What is a Teardrop attack and how can it affect you?

A Teardrop attack is a type of Denial-of-Service attack in which the criminal delivers large volumes of malware data to the targeted machine, causing it to fall. Let’s plumb its depths and explain more.

Teardrop attack – detailed explanation

One of the most common DoS (Denial-of-Service) attacks is the Teardrop DoS attack. Its goal is to inundate its target with malicious fragmented data packets that the victim will be unable to reconstruct and, as a result, will be unable to operate. This exploit takes advantage of a unique flaw in the TCP/IP reassembly procedure. As a result, the fragmented data packets exceed the victim’s capacity until it crashes while attempting to process them.

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by Donny3 Min Reading
Cyber attacks, DNS

What is DNS spoofing and how to protect yourself?

What does DNS spoofing mean?

DNS spoofing is a form of cybercrime. Criminals insert spoofed or stolen DNS records into a recursive server’s cache. This is due to answering DNS users’ queries with a falsified record, such as a forged IP address. Legitimate traffic is therefore fraudulently redirected to dangerous places (generated websites). Once there, consumers may be compelled to enter sensitive information (passwords, bank credit card details, etc.) for hackers to exploit later.

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by Donny3 Min Reading
DNS

Why is DNSSEC worth your attention?

DNSSEC – What does it mean?

DNSSEC is the short version for Domain Name System Security Extensions, and it is an effective method for boosting the security of your domain. It is an additional DNS trait. Once you start implementing it, DNSSEC is going to add a digital signature to every DNS record. That way, it ensures that the source of the domain is authentic.

It was invented to protect the users on the Internet from falsified DNS data. The IP address of a particular website could be malicious and mislead the users to a different web page instead of the actual one they requested.

With DNSSEC, the DNS lookups are verifying that the source of the website’s DNS is actually true, thanks to the digital signatures. As a result, some of the malicious attempts of the attackers could be prevented. The browsers of the users are not going to open a website when the digital signatures don’t match.

Try this great DNSSEC service!

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by Donny3 Min Reading
DNS

3 ways to avoid DNS outage

DNS outage explained.

DNS outage represents the time in which your DNS is not working. There are various reasons why this happen. For example, the incoming traffic is a lot, or your server is attacked. That does not allow the DNS resolution of your domain name to its IP address. All the users trying to connect with your domain are going to receive an error message and won’t be capable of exploring your website.

What are the consequences of a DNS outage?

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by Donny3 Min Reading
DNS

Basic knowledge of DNS

DNS is a fundamental element of the Internet that has an essential purpose. This infrastructure makes the usage of the Internet for humans simple and easy. So, let’s explain a little bit more about it!

DNS explained

The Domain Name System (DNS) holds an extensive database with all actual domain names and the IP addresses that correspond to them.

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by Donny3 Min Reading