CASE STUDIES

What failed, what I checked, and what changed.

Short incident records focused on evidence, root cause, recovery, and control improvements.

INCIDENT 01

Proxmox container failure

Problem

An LXC container failed to start following host maintenance.

Investigation

Reviewed task output and startup hooks, then traced the failure to an unavailable CIFS-backed storage path.

Resolution

Restored NAS availability, validated the persistent mount, and confirmed normal container startup.

Improvement

Documented storage dependencies and added explicit mount checks to the recovery workflow.

INCIDENT 02

Storage recovery

Problem

Application services depended on network storage that was not available at startup.

Investigation

Validated NAS reachability, credentials, permissions, mount points, and the host configuration.

Resolution

Re-established the mount and verified that applications could read and write expected paths.

Improvement

Treated storage as an explicit service dependency rather than an assumed resource.

DESIGN 03

Network segmentation

Goal

Reduce unnecessary trust between personal endpoints and connected devices.

Design

Separated trusted clients and IoT devices into distinct VLANs managed through UniFi.

Exception handling

Used mDNS only where service discovery was required across boundaries.

Outcome

Created clearer traffic boundaries without breaking required smart-home functions.

DESIGN 04

External service security

Goal

Provide remote access to approved applications without exposing internal administration.

Design

Published HTTPS applications through a reverse proxy while keeping infrastructure dashboards private.

Boundary

VPN remains the administrative path; public visitors do not receive internal network access.

Outcome

Remote services remain usable while the management plane stays inaccessible from the internet.