How to harden your self-managed GitLab instance

Securing your GitLab instance involves a process known as hardening, which focuses on disabling unused features and adjusting settings to minimize security risks while maintaining user productivity. This approach is guided by principles such as layered security, which advocates for multiple security measures, and avoiding security through obscurity, as obscurity is ineffective against modern scanning tools. Key strategies include reducing the attack surface by disabling unnecessary services, enabling multi-factor authentication, enforcing stringent sign-up checks, limiting public visibility of projects, hardening SSH settings, and securing CI secrets. Additionally, protecting pipelines for all branches ensures the integrity of automated tasks within CI/CD processes. Detailed documentation is available to support these efforts, ensuring that GitLab's security practices align with its commitment to transparency and open source.

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