Security Audit

Audit host security using built-in system tools. No external tools required — uses netstat, lsof, ss, ufw/iptables, systemctl, ps, who, and last.

Prerequisites

No install needed. All tools are standard on macOS and Linux.

For Linux firewall checks, ufw or iptables must be available. On macOS, pf is used.

Commands

Open Ports & Listening Processes

# All listening ports with process names (Linux)
ss -tlnp