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Security report for nextdns.io

NextDNS Inc. · Technology · United States

Medium risk. 5 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

70/100

Risk levelMedium

0–100, higher is better. How it is calculated

NextDNS Inc. operates a modern DNS firewall service designed to protect users from malware, phishing, cryptojacking, and intrusive ads and trackers. The company targets privacy-conscious consumers and families seeking secure and supervised Internet access across all devices and networks. Positioned as a leading DNS security provider, NextDNS leverages real-time threat intelligence and supports encrypted DNS protocols to deliver robust protection. The website demonstrates a mature digital presence with a modern tech stack including React and Next.js, hosted on Cloudflare infrastructure, ensuring fast performance and mobile optimization. Security posture is strong with HTTPS enforcement and multiple security headers, though DNSSEC is not enabled on the domain. Privacy compliance is supported by a comprehensive privacy policy and configurable data retention options, but lacks explicit cookie consent mechanisms and published terms of service. Overall, the domain registration data aligns well with the business claims, reinforcing legitimacy and trust. Strategic recommendations include enabling DNSSEC, publishing terms of service and security policies, and adding clear contact and incident response information to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
65/ 100 · Medium
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

5 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

Need hands-on remediation? Email guard@offseq.com

Keep watching nextdns.io

This scan found 21 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
75
Security headers
35
Email security
70
DNS health
75
Network security
100
GDPR outside view
65
Average
70

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

NextDNS operates in the technology sector, providing DNS-based security and privacy services with a subscription business model. The company focuses on delivering advanced threat protection, ad and tracker blocking, and parental controls, appealing to individual users and families. Its market position is strengthened by real-time threat intelligence feeds and support for modern encrypted DNS protocols. The company maintains active engagement through social media channels such as Twitter, Reddit, Medium, and GitHub, fostering community trust and transparency. The business is relatively young, founded in 2019, with consistent domain registration data. No evidence of partnerships or subsidiaries was found in the analyzed content. The website content is professionally presented with excellent design and navigation, supporting a positive user experience and strong brand consistency.

Security posture

The website enforces HTTPS with an excellent SSL configuration and implements multiple security headers including HSTS, CSP, and X-Frame-Options, reflecting a mature security posture. The use of DNS-over-HTTPS and DNS-over-TLS protocols further enhances user privacy and security. No exposed sensitive data or vulnerable libraries were detected. However, DNSSEC is not enabled on the domain, representing a missed opportunity for enhanced DNS security. The absence of a published security policy, incident response contacts, and a security.txt file limits transparency in vulnerability management. Privacy compliance is supported by a detailed privacy policy and configurable log retention, but lacks cookie consent mechanisms. Overall, the security posture is strong but could be improved by addressing these gaps.

Recommendations

  1. Enable DNSSEC on the domain to strengthen DNS security.
  2. Publish terms of service and a dedicated security policy on the website.
  3. Implement a cookie consent mechanism to comply with privacy regulations.
  4. Provide clear contact information including security incident response channels.
  5. Consider publishing a security.txt file to facilitate vulnerability disclosures.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
NextDNS Inc.
Description
NextDNS protects users from security threats, blocks ads and trackers on websites and apps, and provides safe and supervised Internet access for kids on all devices and networks.
Key services
Malware and phishing protection, Ad and tracker blocking, Parental controls, Analytics and real-time logs, DNS-over-HTTPS and DNS-over-TLS support
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, DNS-over-HTTPS, DNS-over-TLS, Cloudflare DNS
Frameworks
Next.js, React
Platforms
Apple, Android, Windows, Chrome, Firefox, Edge, Brave, Ubiquiti
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • DNSSEC supported (though not enabled on domain)
  • Use of modern encrypted DNS protocols
  • No exposed sensitive data found
  • No vulnerable libraries detected

Analytics and tracking

Tracking level
minimal
Privacy practices
good

Advertising

Transparency
poor

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenges
  2. Strong focus on DNS security, privacy, and parental control features
  3. Comprehensive and well-structured content with multiple language alternates
  4. Active social media presence supporting community engagement
  5. No direct contact emails or phone numbers found on main page
  6. No explicit cookie consent mechanism detected
  7. WHOIS data is transparent and consistent with business identity
  8. Modern tech stack and hosting infrastructure used
Technical notes

Notes

The website is built using a modern React and Next.js framework, leveraging Cloudflare for DNS and hosting services, which contributes to fast loading times and excellent mobile optimization. The site includes comprehensive meta tags and Open Graph data supporting SEO and social media sharing. Accessibility features are present but could be further enhanced. No CMS was detected, indicating a custom-built solution. The technical implementation is robust with no broken elements or errors observed. Opportunities exist to improve cookie management and formalize security documentation to reduce technical debt and enhance compliance.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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