November 21, 2024

Author: Mark

Uncategorized

Understanding DNS Flood Attack: What Is It and How to Protect Against It

Markby Mark0

In today’s digital age, cybersecurity threats continue to evolve, targeting critical components of online infrastructure. One such threat is the DNS flood attack, a type of Distributed Denial of Service (DDoS) attack aimed at overwhelming Domain Name System (DNS) servers. This blog post will explore what DNS flood attacks are, how they work, and what can be done to protect against them.

What Is a DNS Flood Attack?

A DNS (Domain Name System) flood attack is a type of DDoS attack that specifically targets DNS servers, flooding them with a massive amount of requests in a short period. DNS servers are responsible for translating domain names (like example.com) into IP addresses that computers use to locate and communicate with each other. By overwhelming these servers with a flood of requests, attackers aim to disrupt the DNS system, rendering websites and other online services inaccessible to legitimate users.

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DNS

GeoDNS: Meaning & Advantages

Markby Mark0

First congrats. If you are googling GeoDNS, you are just one step away from giving excellent service to your clients. Let’s explore in detail what GeoDNS is and what its advantages are.

What does GeoDNS mean?

GeoDNS service is a premium DNS service that includes GeoDNS servers. These servers can check the DNS query of the clients. See their IP address, and based on the IP tables they use, they can redirect the clients to the closest web servers near them. The GeoDNS servers can do it by having multiple A or AAAA records and providing the right one that best suits the client’s query.

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DNS / DNS Records / Network

Why is the PTR record so important?

Markby Mark0

PTR record is not one of the most popular DNS record types, but it is absolutely important. Why? We will explore this and its main purpose in this article. So, let’s start.

PTR record: Meaning

The reverse equivalent of an A record is known as a PTR record. The PTR record maps an IP address to a hostname, whereas the A record translates a domain name to an IP address. As a result, the Pointer record assures that your IP address connects to your host in an official manner.

If you’re utilizing both internal and external mail servers, you’ll need to set up the Pointer record. This record improves the reliability of sending servers by allowing the receiving end to verify your IP address’s hostname. It’s a great strategy to defend yourself from all kinds of spammers.

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DNS

DNS resolution explained

Markby Mark0

How is it possible that we never learn a single IP address of a site, yet we can browse the Internet without any problems? What magical process transforms simple-to-write domain names into IP addresses and makes it so easy for us humans? It is called DNS resolution!

What is the DNS resolution?

DNS resolution is the process that DNS uses to resolve domain names to their IP addresses. It starts with a simple client’s DNS query for a domain name that later goes through a DNS recursive resolver, different DNS servers on different levels (Root, TLD, and authoritative servers) and brings back the IP address of the domain in the form of an A or AAAA record.

What to do if DNS resolution is not working?

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DNS / DNS Records / Network

Reverse DNS: Everything you need to know

Markby Mark0

Reverse DNS – what does it mean?

Reverse DNS, or simply rDNS, is a mechanism for translating an IP address into its matching domain name. Compared to the standard Forward DNS lookup, which resolves the domain name to its IP address, it serves the exact opposite purpose.

You can use it to establish that a specific IP address corresponds to a particular domain name. One of the most common reasons for using it is establishing trust in email servers. They use Reverse DNS lookups to make sure the email came from a legitimate source and isn’t a hoax.

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DDoS protection / DNS / Network

Advantages of using DDoS protection service

Markby Mark0

DDoS protection service – What is it?

DDoS protection service, or also called DDoS mitigation, is a popular added DNS service. It is a blend of several tools and methods applied to examine traffic and stop DDoS attacks. DDoS attacks are associated with a huge amount of malicious traffic created by cybercriminals. With it, they attempt to make your servers unstable and overwhelmed. As a result, the servers are not able to respond to the requests of the regular clients. 

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DNS

Most popular DNS commands

Markby Mark0

These DNS commands are well-known for their great functionality and are also frequently applied for DNS troubleshooting. The reason for that is they are simple and easy to use. You are able to check essential information about your DNS records and what is the condition of your network. Moreover, it doesn’t matter what Operating System (OS) you are using, Windows, macOS, or Linux. You already have several commands pre-build in your OS. Therefore, let’s clarify which are the most popular DNS commands and explain a little bit more about them.

What is the MTR command?

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DNS

DNSSEC – why is it important?

Markby Mark0

DNS, by default it is not safe. Its purpose is to be able to provide a decentralized model for domain resolution and to do it fast because there are billions of people online always. Yes, the focus of the DNS is not safety. But there is a strong need for it, so here comes the DNSSEC. The DNSSEC is the security extension that gives us a good level of protection.

What is DNSSEC?

DNSSEC (Domain Name System Security Extensions) is an extension, on top of the DNS, that encrypts the DNS records that we use to communicate with the name servers. That way, even if somebody intercepts those DNS records, they will be encrypted and unreadable to them. So the cybercriminals will be with pointless random text in their hands.

DNSSEC provides security to the DNS in a simple and effective way.

Learn more about the DNSSEC service!

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DNS / DNS Records

Top 4 most popular DNS records

Markby Mark0

The Domain Name System (DNS) matches the domain names to their corresponding IP addresses. Thus, DNS records give the information for your hostname, domain, and IP address. With DNS records, you can adjust your domain configuration. There are many types of DNS records, but let’s start with the top 4 most popular of them.

A record and AAAA record

The A record is probably the most popular DNS record because it is used in almost any DNS system. It is an address record, so its purpose is to point a domain name to the corresponding IP address. Thanks to that, humans are not required to remember long and difficult numbers (IP addresses). Yet, the A record is usable when we are talking about IPv4 addresses.  

In case when we want to point a domain name to an IPv6 address, we have to use the AAAA record. It is not so commonly used in comparison to the A record. However, the amount of new devices is rapidly growing, so eventually,, the IPv6 and the AAAA record will also gain popularity.

What is an RP record?

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DNS / DNS Records

DNS AAAA record explained

Markby Mark0

The DNS AAAA record is one of the essential Domain Name System records. It works with the IPv6 address. Let’s explain a little bit more about it.

What is the DNS AAAA record?

The DNS AAAA record is a DNS resource record. It has the main purpose of linking a domain name with the IP address, which it corresponds to. This is a process that happens every time a domain name is requested for the site to be accessible. The browser will be incapable of finding the IP addresses successfully for the requested domain names. For users will be impossible to reach your website without help from the AAAA record.

How to check the AAAA record?

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