What is DNS Security

What is DNS Security? The Ultimate Guide to DNS Security for Enterprises

The Domain Name System (DNS) is a fundamental component of the internet, translating human-readable domain names (e.g., `example.com`) into IP addresses that computers use to communicate. However, DNS was not originally designed with security in mind, making it a prime target for cyberattacks. For enterprises, securing DNS is critical to protecting sensitive data, ensuring uptime, and preventing cyber threats.  

In this guide, we’ll explore what DNS security is, the risks associated with unsecured DNS, and the best practices enterprises should follow to safeguard their networks.  

Why DNS Security Matters  

DNS is often referred to as the “phonebook of the internet.” When DNS is compromised, attackers can redirect users to malicious sites, disrupt business operations, and steal confidential data. Given that over 90% of malware uses DNS in some form, securing DNS should be a top priority for enterprises.  

The Evolution of DNS Security  

DNS security was originally invented to protect against traditional attacks like blocking malicious or forbidden websites or applications at the DNS level.  

However, attack methods have changed in frequency and sophistication, with modern-day identity and credential theft attacks leading the way. In fact, there has been a 95% increase in attacks in 2024 compared to 2023**, with credential theft making up 90% of those attacks (MGM Grand, TicketMaster).  

This has resulted in traditional standalone DNS solutions providing a false sense of security, lacking the necessary threat intelligence to protect users from today’s most frequent and sophisticated cyberattacks.  

Common DNS Security Threats  

DNS Spoofing (Cache Poisoning)

Attackers manipulate DNS records to redirect users to fraudulent websites, often for phishing attacks or malware distribution.  

DNS Tunneling

Cybercriminals use DNS queries to bypass security controls and exfiltrate data from a compromised network.  

DDoS Attacks on DNS

Distributed Denial-of-Service (DDoS) attacks flood DNS servers with requests, making enterprise services unavailable.  

Typosquatting & Domain Hijacking

Attackers register domains that resemble legitimate ones to deceive users or take control of business-critical domains.  

Man-in-the-Middle (MitM) Attacks

Hackers intercept and manipulate DNS communications to alter the destination of web traffic.  

Is DNS Protection Alone Not Enough?  

DNS security remains a vital component of any comprehensive security strategy, which is why we include it as part of our secure browser platform, complimentary.

However, traditional DNS protection was designed to filter web content and defend against known risks—it cannot guard against modern-day and Zero-Day attacks. This leaves enterprises blind to what is really happening beneath the surface.  

With DefensX, enterprises gain complete protection against both traditional and modern threats, including:   Identity theft, Credential theft, Malicious advertisements, Data loss risks and more.

Best of all, DefensX delivers this advanced protection without requiring any changes to user behavior, browsers, or devices. The result? Seamless policy adherence, satisfied users, and uninterrupted efficiency, productivity, and cost-effectiveness.

Best Practices for DNS Security  

1. Use DNS Security Extensions (DNSSEC)

DNSSEC adds cryptographic signatures to DNS records, ensuring their authenticity and protecting against DNS spoofing.  

2. Implement DNS Filtering

DNS filtering blocks access to known malicious domains, preventing users from visiting phishing or malware-hosting sites.  

3. Monitor DNS Traffic for Anomalies*

Analyzing DNS logs can help detect suspicious activity, such as unusual queries or data exfiltration attempts.  

4. Enable DNS Encryption (DoH & DoT)

DNS over HTTPS (DoH) and DNS over TLS (DoT) encrypt DNS queries to prevent interception and tampering.  

5. Leverage Cloud-based DNS Security Services

Solutions like Secure DNS gateways provide real-time threat protection and prevent unauthorized access.  

6. Restrict Recursive DNS Resolvers

Limiting who can make recursive DNS queries reduces the risk of exploitation by external attackers.  

7. Regularly Update and Patch DNS Infrastructure

Ensure that DNS software and configurations are up to date to mitigate vulnerabilities.  

Do I Still Need DNS Protection?  

Absolutely! While traditional DNS security is not enough on its own, it is still a critical first line of defense against cyber threats. However, it’s critical that enterprises go beyond just DNS filtering.  

Conclusion  

DNS security is an essential aspect of enterprise cybersecurity, protecting businesses from phishing, data breaches, and downtime. However, relying on traditional DNS security alone is no longer enough.  

With DefensX, enterprises gain complete protection against both traditional and modern threats, including identity theft, credential theft, malicious advertisements, and data loss risks often linked to popular AI platforms.

Best of all, DefensX delivers this advanced protection without requiring any changes to user behavior, browsers, or devices. The result? Seamless policy adherence, satisfied users, and uninterrupted efficiency, productivity, and cost-effectiveness.

Ready to elevate your enterprise DNS security? Discover how DefensX can Redefine your Browser as a Secure Digital Workspace today!