Hardening a Linux server
Reduce what an attacker can reach: lock down SSH, close unused ports, block brute force and keep software patched.
- Intermediate
- Level
- 3
- Lessons
- 3 min
- Study time
Course content
- 1. Reducing the attack surfaceEvery running service is something an attacker can probe. Hardening starts by removing what you don't need.1 min
- 2. Locking down SSHSSH is the front door of your server, and bots try it within minutes of a server going online.1 min
- 3. Patching and auditingMost break-ins use vulnerabilities that already had a fix. Patching quickly is the highest-value security habit.1 min