Securing Your Linux Infrastructure

Linux servers are the backbone of modern enterprise infrastructure, but they are constantly targeted by sophisticated cyber attacks. Hardening your servers is no longer optional—it is a critical requirement.

1. Disable Root Login

Never allow direct root SSH access. Always use standard user accounts and elevate privileges via sudo. Modify your /etc/ssh/sshd_config file to include:

PermitRootLogin no

2. Enforce SSH Key Authentication

Passwords can be brute-forced. SSH keys provide cryptographic security. Ensure password authentication is disabled.

3. Implement Strict Firewall Rules

Use ufw or iptables to restrict incoming traffic strictly to the necessary ports.

By following these fundamental practices, you lay the groundwork for a secure infrastructure. For comprehensive management, consider our Managed IT and SOC services.