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Security report for linuxcontainers.org

Technology · N/a

Medium risk. 7 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

51/100

Risk levelMedium

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

linuxcontainers.org is an established open source umbrella project founded in 2013 that provides a suite of Linux container and virtualization tools including Incus, LXC, LXCFS, and Distrobuilder. The project targets developers, system administrators, and cloud infrastructure professionals seeking flexible, vendor-neutral container solutions. The website presents comprehensive information about active and deprecated projects, community resources, and documentation links, reflecting a mature and well-maintained ecosystem. Technically, the site uses modern web technologies such as HTML5, CSS3 with the Vanilla Framework, and JavaScript libraries like jQuery, delivering a responsive and accessible user experience. Security posture is moderate with HTTPS usage implied, but lacks DNSSEC and explicit security headers. Privacy and compliance documentation such as privacy policy and cookie consent are absent, indicating room for improvement in GDPR compliance. Overall, the domain registration is consistent and trustworthy, supporting the legitimacy of the project.

Scanned

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

7 findings rated critical or high. Fix these first.

  1. 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  2. 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 Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • 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';…
  3. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

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

Keep watching linuxcontainers.org

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.

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  • 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
0
Security headers
15
Email security
70
DNS health
80
Network security
100
GDPR outside view
40
Average
51

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention linuxcontainers.org, from OffSeq Breach.

Total records
25
Employees
0
Customers
25
Third parties
0
Weak passwords
12%

2 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for linuxcontainers.org.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

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

Business context

Business profile

The Linux Containers project occupies a niche in the container and virtualization technology sector, offering open source tools that cater to a technical audience. Its business model is community-driven and open source focused, with no direct commercial offerings visible on the homepage. The project benefits from a strong ecosystem including GitHub repositories, forums, IRC channels, and mailing lists, fostering collaboration and support. The absence of direct contact information or formal business entity details suggests a non-commercial organizational structure. The project is well-positioned as a foundational technology provider in the Linux container space, with potential growth tied to the broader adoption of containerization and virtualization technologies.

Security posture

The website demonstrates a basic to moderate security posture. The domain is protected against unauthorized transfers via clientTransferProhibited status, and HTTPS is used for main URLs. However, DNSSEC is not enabled, which could expose DNS to spoofing risks. No security headers such as Content-Security-Policy or X-Frame-Options were detected, and there is no published security policy or incident response information. The lack of a vulnerability disclosure policy or security.txt file limits transparency for security researchers. No analytics or tracking scripts reduce privacy risks but also limit monitoring capabilities. Overall, the security posture is adequate for an informational open source project site but could be enhanced with modern security best practices and compliance documentation.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a clear privacy policy and cookie consent mechanism to improve GDPR compliance.
  3. Implement standard security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  4. Create and publish a security policy and incident response contact information to improve transparency and trust.
  5. Consider adding a vulnerability disclosure policy or security.txt file to facilitate responsible reporting.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Description
The umbrella project behind Incus, LXC, LXCFS, Distrobuilder and more. Provides a distro and vendor neutral environment for Linux container technologies, focusing on containers and virtual machines that run full Linux systems.
Key services
LXC container runtime, Incus container and VM manager, LXCFS userspace filesystem, distrobuilder image building tool, libresource system resource library, lxcri container runtime wrapper
Content quality
good
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, jQuery, Bootstrap-rating
Frameworks
Vanilla Framework 4.1.0
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
65/100
Good practices seen
  • Domain status clientTransferProhibited set
  • HTTPS usage implied by og:url and twitter:url (https)

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with rich content about Linux container projects.
  2. No privacy, cookie, or terms of service policies found on the homepage.
  3. No contact emails or phone numbers explicitly provided on the homepage.
  4. Strong open source community presence with GitHub, forums, IRC, and mailing lists linked.
  5. No security.txt or vulnerability disclosure policy found.
  6. No explicit security headers detected in provided data.
  7. No analytics or tracking scripts detected.
  8. Website uses modern CSS framework and fonts with responsive design.
  9. No advertising or marketing tools detected.
Technical notes

Notes

The website is built using modern web standards with HTML5 and CSS3, leveraging the Vanilla Framework for styling and jQuery for scripting. The site loads external fonts and stylesheets from trusted sources such as rsms.me and assets.ubuntu.com. The navigation is clear and accessible, with ARIA roles and skip links for accessibility. Performance is moderate with no heavy scripts detected. The site lacks CMS indicators, suggesting a static or custom-built site. Hosting provider details are not explicitly available. No analytics or advertising scripts were found, indicating minimal tracking. Overall, the technical implementation is solid with opportunities to improve security headers and privacy 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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