Raymond Ops

Aug 15, 2026 · Information Security

Frequent SSH Brute‑Force Attacks? Essential Defense Measures You Must Configure

When a server is exposed to the Internet, SSH brute‑force attempts are inevitable; this guide walks Linux operators through log analysis, disabling password authentication, enabling public‑key and 2FA, configuring fail2ban, changing the default port, restricting source IPs, deploying OSSEC, and automating daily and weekly security checks.