Secure DNS

Forget about accessing malicious websites by using a secure DNS that will prevent you from infecting your system with viruses and malware!

What is DNS (Domain Name System) security?

Everyone who uses the Internet uses domain names to specify which site they want to go to. Every computer uses a different IP address to route traffic through the Internet and identifies systems connected to the Internet. DNS is a protocol that makes the Internet usable by allowing people to use domain names.

The job of DNS security is to protect the DNS infrastructure from any cyber-attack so it can keep working fast and reliably. A DNS security strategy that is effective uses multiple overlapping defenses, applies security protocols like DNSSEC, and requires strict DNS logging.

The importance of DNS security

When the DNS system was made, security was not one of the things they put a lot of work into, and this system has several design limitations. What we’ve mentioned just now is the case for many internet protocols, not just DNS. These limitations, combined with the advanced technology, will make DNS servers vulnerable to several attacks like amplification, spoofing, Denial of Service (DoS), or hijacking of personal information. DNS plays an essential role for the Internet overall, which is why it is one of the main targets for attacks.

When it comes to DNS attacks, they usually aren’t the only attacks that occur. This is because the attacker wants to throw the security team off the trail and not know the real target. Any organization needs to find the point of origin or a DNS attack and stop it in time, meaning there should always be enough staffing and resources dedicated to this job.

 

 

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The most common attacks

Like always, attackers will find several ways to attack and exploit servers like DNS. Here’s a list of a few of the most common ones and what happens during these attacks.

DNS Hijacking: When it comes to this attack, an attacker will redirect queries to a different domain server. How they do this is usually thanks to malware or an unauthorized mod of a DNS server. Even though this type of attack seems very similar to DNS spoofing, this is, in fact, a different type of attack because it explicitly targets DNS records of the website instead of the cache.

DNS spoofing: This type of attack and also be called cache poisoning. Fake DNS data is put into a DNS cache when this attack occurs. This results in returning the incorrect IP address for a domain. This means that instead of going to the correct website, traffic will be directed elsewhere, usually to a malicious replica of the site, and will gather information like login credentials.

DNS Tunneling: This attack will tunnel through DNS responses and queries using other protocols. SSH, HTTP, or SSH can be used to pass malware or stolen info into queries and is usually undetected by firewalls.

Phantom domain attack: This attack is similar to an NXDOMAIN attack. An attacker will set numerous phantom servers that can either respond slowly or not at all. This will hit a resolver with many requests to these domains, leading to slow performance.

NXDOMAIN attack: The attacker will ask for records that don’t exist, hoping to result in DoS for traffic. A sophisticated tool can generate subdomains automatically for every request. Also, an attacker can target someone to fill the cache with junk requests.

Domain lock-up attack: What happens here is that the attackers will set up resolvers and domains to create TCP connections with actually legitimate resolvers. When the attack occurs, and the resolvers send requests, they will be hit back with slow packets, limiting their resources.

Random Subdomain attack: The attacker will send DNS queries for a few nonexistent, random subdomains of one actual website. This attack aims to create DoS, making it almost impossible to look up the site. Also, the cache might get filled with bad requests, slowing down the response even more.

Botnet-based CPE attacks: CPE (Customer Premise Equipment) devices will carry out these attacks. Service providers will give their customers hardware like routers, modems, and cable boxes for use. Attackers can compromise the CPEs, and these devices will become a part of a botnet, which is used to perform subdomain attacks against a site or a domain.

DNS Security Extensions (DNSSEC)

This is a security protocol made to mitigate problems. DNS Security Extensions will protect you against any attacks by signing data digitally to help you make sure it is, in fact, valid. In order to do this securely, the signing must be done at every level of this process.

The previously mentioned signing process is pretty close to signing any legal document on paper with your pen. The person creates a unique signature that no one else can make, and an expert can verify whether the actual person signed that document or the signature was forged. The digital signature does the same thing by guaranteeing that the data hasn’t been tampered with.

Even though advanced security is better, DNS Security Extensions are made to be backward-compatible to make sure that traditional DNS still works properly. DNSSEC should be able to work with other security measures, including TLS-SSL, as a part of the security strategy for the Internet.

DNSSEC needs to create a child-parent train of trust that will go all the way to the root zone. This trust mustn’t be broken because the request will be vulnerable to any future attacks. The root zone needs to be verified to close the trust chain, which is a thing an actual person does.

 

 

How to protect yourself against other DNS-based attacks?

Operators of a DNS zone can go one step further and secure their servers even more. A simple strategy to prevent DDoS attacks is over-provisioning infrastructure. To simplify this, the more traffic your server can handle, the harder it is to harm it. Organizations can establish multiple redundant DNS servers to accomplish this. Also, they can use load balancing to send DNS requests to servers that are working when others aren’t. Another way to protect yourself is by using a DNS firewall.

DNS firewall

This is a tool that can provide multiple performance and security services for DNS servers. DNS firewall can be found between the site you are trying to reach and a user’s recursive resolver. Attackers who try to harm the server can be shut down thanks to the firewall that provides rate-limiting services. If the site encounters some problems or is the target of an attack, the firewall can keep the site up and running by serving responses directly from the cache. A firewall can also provide faster DNS lookups and smaller bandwidth costs.

DNS can be used as a security tool

DNS resolvers can provide security solutions for their users if configured accordingly. Content filtering is provided by some DNS resolvers, and what this does is basically block malware and spam. It also comes with botnet protection which will block all communication with botnets. Most of these resolvers are completely free to use, and users can decide to switch to one by simply changing their router’s settings. This might not be as easy for some users, but with a little help from your security provider, it can be done.

How to maximize DNS security?

TechProComp cares about security very much and offers top-notch services that will maximize the security of your DNS servers. Some of the included services are DDoS mitigation, DNSSEC, and multi-DNS functionality. If you have additional questions about securing your servers and ensuring they work flawlessly or any other questions, feel free to contact our support team, which is available at all times.

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Cyber Security Services

Cloud Firewall

Cloud firewalls are designed for modern needs and can be found in an online environment. Unlike the regular firewall that’s installed on your computer or server, these firewalls are hosted in the cloud.

Cloud Firewall

Cloud firewalls are designed for modern needs and can be found in an online environment. Unlike the regular firewall that’s installed on your computer or server, these firewalls are hosted in the cloud.

Endpoints Detection and Response

EDR (Endpoint Detection and Response), also known as endpoint detection and threat response (EDTR), is a security solution that constantly monitors devices to detect and respond to cyber threats like malware and ransomware.

Endpoints Detection and Response

EDR (Endpoint Detection and Response), also known as endpoint detection and threat response (EDTR), is a security solution that constantly monitors devices to detect and respond to cyber threats like malware and ransomware.

LAN Zero Trust

Zero Trust is a type of security model which requires mandatory verification for everyone who wants access to data on a secure network. The same rules apply in both cases, whether they are outside or inside of the network.

LAN Zero Trust

Zero Trust is a type of security model which requires mandatory verification for everyone who wants access to data on a secure network. The same rules apply in both cases, whether they are outside or inside of the network.

Managed Detection and Response (MDR)

MDR (Managed detection and response) is a type of cybersecurity service that uses the most advanced technology with human expertise to successfully hunt, monitor, and respond to possible threats.

Managed Detection and Response (MDR)

MDR (Managed detection and response) is a type of cybersecurity service that uses the most advanced technology with human expertise to successfully hunt, monitor, and respond to possible threats.

Next-generation Firewall

We’ve all heard about firewalls. They’ve been around for quite some time, but the threats become more advanced every day, and security needs to become much more advanced to stop the most sophisticated threats.

Next-generation Firewall

We’ve all heard about firewalls. They’ve been around for quite some time, but the threats become more advanced every day, and security needs to become much more advanced to stop the most sophisticated threats.

Ransomware Protection

Ransomware attacks have become more sophisticated in the previous two years, and organizations cannot completely prevent these hackers from harming their systems. One of the examples is getting infected by malware that is looking for weak system backups and encrypts your data once it gets to it.

Ransomware Protection

Ransomware attacks have become more sophisticated in the previous two years, and organizations cannot completely prevent these hackers from harming their systems. One of the examples is getting infected by malware that is looking for weak system backups and encrypts your data once it gets to it.

Secure DNS

The job of DNS security is to protect the DNS infrastructure from any cyber-attack so it can keep working fast and reliably. A DNS security strategy that is effective uses multiple overlapping defenses, applies security protocols like DNSSEC, and requires strict DNS logging.

Secure DNS

The job of DNS security is to protect the DNS infrastructure from any cyber-attack so it can keep working fast and reliably. A DNS security strategy that is effective uses multiple overlapping defenses, applies security protocols like DNSSEC, and requires strict DNS logging.

Secure Remote Access

More people have started working from home lately, so secure remote access has become a must for a lot of organizations. Accessing a desktop from a remote location allows authorized users to take complete control of a computer to fix issues, see or change files, or even change some settings.

Secure Remote Access

More people have started working from home lately, so secure remote access has become a must for a lot of organizations. Accessing a desktop from a remote location allows authorized users to take complete control of a computer to fix issues, see or change files, or even change some settings.

Secure Web Gateway

SWG (Secure Web Gateway) is a product used for cyber security that implements security measures and secures sensitive data. Also, this product blocks any unauthorized or risky user behavior.

Secure Web Gateway

SWG (Secure Web Gateway) is a product used for cyber security that implements security measures and secures sensitive data. Also, this product blocks any unauthorized or risky user behavior.

Content Filtering

Content filtering is a process of exclusion of access and screening web pages or emails that are unwanted. These solutions look for specific content patterns, and if those requirements are met, the software will block the content or flag it.

Content Filtering

Content filtering is a process of exclusion of access and screening web pages or emails that are unwanted. These solutions look for specific content patterns, and if those requirements are met, the software will block the content or flag it.

Wifi Security

A secure WiFi connection can only be established once a wireless client and the wireless network they are connecting verify each other’s identities. Those wireless clients can be smartphones, laptops, tablets, etc.

Wifi Security

A secure WiFi connection can only be established once a wireless client and the wireless network they are connecting verify each other’s identities. Those wireless clients can be smartphones, laptops, tablets, etc.

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