What is DNS Hijacking and How To Prevent It   

Key takeaways: 

• DNS hijacking redirects users to fake or harmful sites without their knowledge. It manipulates DNS so you end up on the wrong page even if the URL looks correct. 
• It exploits weak points and is hard to detect. Attacks can happen through devices, routers, or networks with little to no visible signs. 
• Strong security measures help prevent it. Tools like DNSSEC, secure passwords, antivirus software, VPNs, and trusted DNS providers reduce the risk. 

DNS hijacking is a cyberattack that redirects DNS queries away from their intended destination by manipulating the Domain Name System, the internet’s address book. Put simply, if you’re wondering what DNS hijacking is, it is not the same as hacking into a website. Traditional hacking often involves stealing data, damaging systems, or installing malware. DNS hijacking targets the route visitors take to reach your site.

For small-to-medium business owners and website administrators, that means customers could be sent to a fake, malicious, or unwanted page without realizing it. Understanding how DNS hijacking works is the first step to protecting your domain name, your visitors, and your brand’s credibility.

How does DNS hijacking work

DNS hijacking attacks the way domain names resolve to IP addresses. Normally, when someone types a web address into a browser, DNS resolves the domain name to the website’s correct IP address.

In a DNS hijacking attack, that process is manipulated. The attacker interferes with DNS responses so the request points to a site under their control instead. Everything may still look normal on the user’s screen, which makes the attack harder to detect.

Steps to DNS hijacking

DNS hijacking usually follows a quiet but deliberate process. The exact method can vary, but the goal is the same: redirect users away from the legitimate website and toward a destination controlled by the attacker.

• Step 1. The attacker creates a dummy site: A fake website that looks like a legitimate one. These malicious websites often copy branding, login pages, and layouts to avoid suspicion.
• Step 2. The attacker identifies a target: A domain name, a domain registrar account, a DNS provider account, or a network setting. Business websites are especially attractive when they handle customer logins or transactions.
• Step 3. The attacker gains access: Access is usually gained through weak passwords, phishing emails, or compromised login credentials. In some cases, the goal is to steal login credentials from website administrators.
• Step 4. The user submits a DNS query: A DNS query starts when a user types a web address into a web browser. These DNS requests ask where the domain should direct the user.
• Step 5. The query resolves to the attacker’s IP: The DNS response returns a fake or incorrect IP address instead of the legitimate one. As a result, the browser follows the wrong route.
• Step 6. The user reaches a fake or malicious destination: The redirect sends users to malicious sites, a malicious domain, or a lookalike page that appears trustworthy. On the user’s screen, the experience may still look normal.
• Step 7. The attacker collects user information: Login attempts on the dummy site expose sensitive information, including login credentials and other sensitive data. Once submitted, that information can be captured without the user realizing it.

Types of DNS hijacking

DNS hijacking can happen in several ways, depending on where attackers interfere with the DNS process. Some attacks target individual devices, while others focus on routers, DNS servers, or account-level DNS settings. In every case, the goal is to manipulate DNS queries so that users are redirected away from the legitimate site and toward a destination under the attacker’s control.

Understanding the different types of DNS hijacking attacks helps business owners and website administrators identify their weakest points. The next sections break down the most common methods, how they work, and why each one can put your website, visitors, and brand reputation at risk.

Common types of DNS hijacking include:

• Local DNS hijacking: A local DNS hijack happens when malicious code is installed on a user’s device and changes its local DNS settings. Once the local DNS is altered, the device may redirect users to fraudulent or unsafe websites.
• Router DNS hijacking: A router DNS hijack targets home or office routers with default passwords, weak credentials, or outdated firmware. A compromised router lets attackers change its DNS settings and redirect traffic for everyone connected to that network.
• Man-in-the-middle attacks: A man-in-the-middle attack intercepts DNS communication between the user and the DNS server. The attacker can modify DNS responses and redirect DNS traffic before the user reaches the intended website.
• Rogue DNS server: A rogue DNS server attack happens when attackers compromise DNS servers or set up a malicious DNS server. Once the DNS resolver is manipulated, DNS records can point users to attacker-controlled domains instead of the legitimate site.
• ISP DNS hijacking: ISPs or governments can redirect DNS requests for censorship, traffic control, or ad injection. In this setup, the DNS resolver handles DNS data by sending users elsewhere.

DNS hijacking vs DNS cache poisoning vs DNS spoofing

DNS hijacking, DNS cache poisoning, and DNS spoofing are related DNS attacks, but they are not identical. Each one manipulates how users reach a website, often by sending DNS queries or DNS responses to the wrong destination.

The main difference is where the manipulation happens. DNS hijacking changes the path in real time via DNS settings, records, or infrastructure. DNS cache poisoning, also called DNS poisoning, plants false data in a DNS cache. DNS spoofing forges DNS responses so a correct-looking domain leads to the wrong IP address.

DNS hijacking

DNS hijacking involves real-time manipulation of DNS queries or DNS infrastructure. Attackers may change DNS settings, alter DNS records, or compromise systems that handle DNS traffic. Once the path is changed, they can redirect traffic to a fake, malicious, or unwanted site.

DNS cache poisoning

DNS cache poisoning inserts false DNS records into the DNS server or device’s cache. Instead of checking the correct destination each time, the system reuses poisoned cache data. As a result, users may continue reaching the wrong site until the cache is cleared or refreshed.

DNS spoofing

DNS spoofing occurs when an attacker forges DNS responses, causing traffic intended for a legitimate domain to be sent to a malicious one. Attackers can achieve DNS spoofing by returning a fake IP address before the correct response is accepted. To the user, the domain name may look right, but the underlying destination has changed. This can support phishing, credential theft, malware delivery, or man-in-the-middle-style surveillance.

How to detect DNS hijacking   

By paying attention to these signs and using these tools, you can quickly identify and respond to possible DNS hijacking attacks.   

Signs of an attack   

Unusual changes in browsing behavior can often identify DNS hijacking. Look out for:   

• Unusual pop-ups: Frequent or unexpected pop-up ads may indicate DNS manipulation, especially on trusted sites.   
• Slow internet speeds: Redirects can add delays, slowing page load times.   
• Redirected websites: DNS settings may have been compromised if you frequently land on pages you didn’t intend to visit.   

Technical tools   

For a more thorough investigation, several technical tools can help you verify if your DNS settings have been compromised.   

• Ping commands: Use a ping command to verify if a website’s IP address matches the expected one. Mismatched addresses can indicate DNS hijacking.
• Online tools (WhoIsMyDNS): Tools like WhoIsMyDNS can reveal which DNS server is handling your requests. If you see an unknown server, this could suggest a hijacked DNS configuration.   
• SSL Certificate warnings: When visiting a secure site, your browser checks the SSL certificate. A warning that the certificate doesn’t match the site name may mean you’ve been redirected to a malicious server.   
• Network monitoring tools: DNS traffic monitoring tools can flag anomalies like unexpected DNS queries or spikes in traffic to suspicious sites, indicating potential DNS hijacking activity.   

What to do if your DNS is hijacked

If you confirm that your DNS has been hijacked, act quickly to regain control and limit the damage. The priority is to restore the correct routing, remove any false DNS data, and identify how the attacker gained access in the first place.

Identify and restore affected DNS settings

Start by checking your domain registrar, DNS provider, and hosting account for unauthorized changes. Review your nameserver (NS) settings, DNS records, and IP addresses to confirm whether traffic is being routed to the legitimate IP address. Restore the correct records as soon as possible, then document what changed for your incident review.

Flush DNS caches across all layers

After restoring the correct records, clear DNS caches on affected devices, browsers, routers, and DNS resolvers where possible. This helps remove false DNS records that may still direct users to the wrong destination. It is especially important if the attack involved DNS cache poisoning or cached records that continue to spread incorrect routing.

Investigate the cause of the compromise

Recovery is not complete until you know how the attacker gains access. Review admin activity, login credentials, email accounts, devices, and plugins for signs of phishing, stolen passwords, or malicious code. Change passwords, enable multi-factor authentication, and scan affected systems before assuming the threat is gone.

Communicate with stakeholders

If users, customers, or employees may have entered sensitive information on a fake page, communicate the risk clearly and promptly. Let them know attackers may have tried to steal login credentials, payment details, or other sensitive data, then recommend next steps such as password resets or account monitoring.

How to prevent DNS hijacking

For website owners and administrators, the best way to prevent DNS hijacking is to reduce the chances of unauthorized access and monitor changes before they affect visitors. Strong DNS security protects your DNS settings, DNS records, and the systems that control how your domain resolves online.

Enable DNS Security Extensions (DNSSEC)

DNS Security Extensions, or DNSSEC, help verify that DNS responses are authentic and have not been altered in transit. It adds a layer of validation to DNS lookups, which makes it harder for attackers to redirect visitors to the wrong site through forged or manipulated DNS data.

Use multi-factor authentication (MFA)

Many DNS hijacks start with stolen credentials. Multi-factor authentication adds an extra layer of protection to DNS provider accounts, making it harder for attackers to change DNS records even if they obtain a password. This is especially important because phishing attempts often aim to steal administrators’ login credentials.

Lock DNS settings

DNS locking helps prevent unauthorized changes to critical domain and DNS settings. When available, use registrar lock, domain lock, or client lock features to add extra approval steps before DNS records can be changed. This reduces the risk of silent changes that redirect traffic without your knowledge.

Monitor DNS traffic

Monitoring DNS traffic helps detect unusual lookup patterns, unexpected redirects, or requests tied to suspicious domains. Website administrators can use DNS filtering, logging, and alerting tools to spot changes early. This gives your team a better chance to respond before visitors are sent to unsafe destinations.

Perform regular patching and updates

Unpatched DNS servers, web servers, VPNs, and management interfaces can give attackers a foothold to change DNS settings. Keep DNS software, plugins, firmware, and admin tools up to date to reduce known risks. Regular updates also help close firmware vulnerabilities that malicious code may exploit.

Segment the network

Network segmentation means splitting systems into separate zones so a breach in one area does not automatically compromise everything. For example, DNS traffic, admin tools, and systems that store sensitive data should not all be in a single open environment. This helps limit damage if a compromised router or device is used in an attack.

Conduct security awareness training

Even strong technical controls can fail if staff are tricked into giving away login credentials. Train employees to recognize phishing emails, fake website prompts, and requests for sensitive information. A DNS hijacking attack often begins when an attacker gains access through human error.

Monitor threats and leverage threat intelligence

Threat intelligence is information about emerging attacks, malicious IP addresses, malicious websites, DNS abuse patterns, and known attacker infrastructure. Use it to watch for suspicious DNS traffic or signs that your domain may be connected to a malicious domain. This helps your team respond faster to new risks.

Perform regular security assessments

Regular security assessments help you review DNS configurations, access controls, and related infrastructure for weaknesses. Schedule time to audit DNS records, confirm DNS settings, and verify that your authoritative nameserver is correct. These reviews can catch unauthorized changes before they affect customers.

Frequently asked questions

Stay protected against DNS hijacking

DNS hijacking can disrupt how visitors reach your website, expose sensitive information, and undermine customer trust. The good news is that you can lower that risk by understanding how these attacks work, watching for warning signs, and keeping your DNS settings, accounts, and records secure.

For business owners and website administrators, proactive protection matters. Strong access controls, DNS monitoring, DNSSEC, regular security reviews, and fast response planning can help you stay in control of your domain before a small issue becomes a larger threat.

When you’re ready to strengthen your online presence, we offer secure domain registration, Domain Privacy + Protection, SSL certificates, and other security-focused services to help protect your website. Every domain purchase also includes free tools like a Coming Soon Page, Link in Bio, and Marketing Calendar, so you can build and manage your brand with more confidence.