Is fail2ban Actually Working? Here's How to Check
Verify fail2ban is protecting you: check jails, test bans, monitor logs, common misconfiguration, and unban IPs when needed.
Tag: security
All the articles with the tag "security".
SSHFS: Ditch SCP & Access Remote Files
SSHFS mounts remote filesystems over SSH so you can browse and edit files locally — faster than scp for interactive work.
SSH Agent Forwarding: How It Works
Understand SSH agent forwarding security risks. When it's safe (almost never), and better alternatives like ProxyJump for jump hosts.
The umask You've Been Ignoring
Understand Linux umask: what it is, how 022 and 027 work, calculating file permissions, and why it matters for shared directories and security.
Running Docker Containers as Non-Root (And Why You Should)
Running as root in containers is a security foot-gun. Learn the USER instruction and numeric UID/GID pattern.
Certificate Pinning: A Secure Connection Guide
Certificate pinning locks your app to a specific TLS cert so MITM attackers can't swap in a rogue CA — how it works and when to use it.
Understanding the regreSSHion Vulnerability in OpenSSH
regreSSHion (CVE-2024-6387) is a remote code execution bug in OpenSSH — what it is, which versions are affected, and how to patch fast.
How to securely deploy Cloudflare Tunnels
Cloudflare Tunnels expose local services to the internet without open ports — secure setup with zero-trust access controls.
SSH Tunneling: A Secure Conduit for Your Data
SSH tunnels forward ports over encrypted connections — local forwarding, remote forwarding, and dynamic SOCKS proxy explained.
User and Group Management in Linux
Create, modify, and delete users and groups on Linux — useradd, usermod, groupadd, sudo access, and /etc/passwd explained.
Ed25519 ssh keys
Ed25519 is faster and more secure than RSA for SSH keys — generate a key pair, add it to authorized_keys, and ditch the old RSA habits.