Security is in
the details.
Reliable access control is about how authentication, segmentation, connectivity and operations fit together.
The architecture question
How should a user or device reach internal services without granting unnecessary network reachability or depending on exposed management ports?
Lab and engineering work
Deploy and inspect FreeRADIUS services in a containerized environment; confirm service health and UDP listener configuration; examine VPN routing and client connectivity; outline how identities and access boundaries should interact.
What to test
Confirm authentication service availability, intentional listening interfaces, routing consistency, and least-privilege access assumptions. Record where additional firewall or identity policies would be required.
Relevant technology
FreeRADIUS, Docker Compose, Proxmox, Linux networking and VPN configurations.
Scope & confidentiality: The illustrated architecture is conceptual. It does not reveal live topology, IP addressing or credentials, and it does not imply full production deployment.