INTERMEDIATE • Service Hardening

tcpdump Monitoring and Hardening Routine #10

Lesson context: Service Hardening (Intermediate level). tcpdump Monitoring and Hardening Routine #10 teaches a defensive workflow for tcpdump with least-privilege access mapping. Scenario: student assignment upload flow (stop unsafe input from reaching core logic). At Intermediate level, this lesson emphasizes practical controls and measurable risk reduction. Command focus: tcpdump, fail2ban-client, journalctl; objective: stop unsafe input from reaching core logic.