How to harden your self-managed GitLab instance

What this post added

This post details specific steps for hardening a self-managed GitLab instance, including enabling multi-factor authentication, enforcing additional sign-up checks, limiting public visibility, hardening SSH settings, reviewing account and limit settings, securing CI secrets with encrypted container technology, and protecting pipelines for all branches. It emphasizes layered security, reducing the attack surface, and avoiding security through obscurity, providing actionable guidance and linking to detailed documentation.