Generate keys, configuration, test
Hardware Security Key: add SSH
Posts for: #Security
Hardware Security Keys
What Yubikey can do and its limitations
act_runner rootless: no start
 [License](https://creativecommons.org/licenses/by-sa/4.0/)](https://blog.schallbert.de/assets/images/posts/2026-03-28-act_runner-dind-failed-to-start-child-solved-thumb.avif "act_runner rootless: no start")
Solving /proc/self/exe: operation not permitted
fail2ban: Configuration error
Analyzing error logs to develop fixes
Rootless act_runner for Gitea
Docker-in-Docker für better security
Add rate limiter to Gitea
Protect Gitea instance from Denial of Service attacks
Rate limiter with Caddy and fail2ban
Caddy’s JSON-style logs parsed by fail2ban through Docker
Gitea crashes: Too many requests
Examining logs to track down possible attacks
Repo-Lookout: Fix repository leaks
remove .git folder from webserver
Broken NVME hard disk?
How to rescue data from a defective SSD
Sending error logs
Setup notification 📧 on Automation failures
Better security for my server
Running fail2ban, borgmatic in Docker