Pourquoi la protection DNS est-elle l'un des éléments les plus importants de la cybersécurité ?

When it comes to network security, we often think of firewalls, intrusion detection systems (IDS), user access control, and other high-level concepts as solutions. However, most cyberattacks start with low-level attacks on DNS servers that are usually ignored by most companies as a minor issue.

 

A hacker can exploit your DNS server to access sensitive information and spy on you if they manage to change your DNS settings. Fortunately, there are plenty of ways to protect your DNS server from malicious third parties.

 

Install a firewall

The first and easiest step in DNS protection is to install a firewall on your network. A firewall will prevent hackers from accessing your server through the internet connection by blocking all unwanted incoming requests. 

 

Firewalls are a simple and effective way to protect your DNS server from malicious hackers, as long as you make sure you follow the latest software updates. SD -WAN is one of the most effective systems to protect your DNS system.  

 

Monitor DNS repudiation attacks

DNS repudiation occurs when a third party tries to change your DNS settings to point to another IP address. This is an easy way for hackers to steal your business information and trick your customers.

Many free services, such as DNS Watchdogs, DNSSEC, and DNS-O-Matic, monitor your DNS settings and alert you to any changes. If a hacker tries to tamper with your DNS settings, these services will immediately email or notify you so you can fix the problem before it becomes fatal.

 

Use protocol identification and filtering

Protocol Identification and Filtering is a feature that automatically identifies new network protocols and allows or denies them accordingly. This handy feature can be used to prevent hackers from using a DNS flood, a method used to overload a server with bogus DNS requests and bring it down. 

 

You will be happy to know that DNS filtering can prevent these attacks. Protocol identification and filtering can also identify and block other malicious protocols such as DNS tunneling, a method used to transfer data through DNS queries.  

 

What are the important things to know about DNS protection?

Although DNS protection is an important part of network security, there are other solutions as well. Controlling user access, for example, can help prevent employees from accessing sensitive data and systems. Intrusion detection systems, on the other hand, can monitor malicious activity and help prevent cyberattacks.

 

The best way to protect your business against a DNS attack is to use a combination of all of these solutions. For example, you must have a firewall that covers all non-routable services such as RDP, web traffic, and SMTP. This type of solution will ensure that hackers will never gain access to your server and malicious third parties will not be able to tamper with your system.

 

Although your IT department may be able to offer some protection against DNS hijacking, the best way to protect your business is to use a combination of available means. By installing a firewall, monitoring for DNS repudiation attacks, and using protocol identification and filtering, you can increase your company's chances of avoiding a hacker attack.