Systems & Operations
Systems
Operating systems, platforms, DNS, authentication, backup, monitoring and security organized for practical infrastructure operations.
Technical areas
Choose an area
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Platforms
Linux, Windows Server, virtualization, containers, macOS and hosting ecosystems.
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Authentication and AAA
Identity, RADIUS, FreeRADIUS, PPPoE, accounting, CoA and secure operations.
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DNS
Authoritative and recursive DNS, DNSSEC, privacy, policies, high availability and troubleshooting.
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Backup and Recovery
Strategy, RPO/RTO, tools, restoration, immutability and disaster recovery.
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Monitoring
NOC, observability, metrics, alerts, dashboards, SNMP, APIs, and evidence-driven troubleshooting.
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Systems Security
Hardening, firewalls, VPNs, IDS/IPS, cryptography, honeypots, and operational protection for services and servers.