# Monitoring and Alerting Overview 2026

Status: Sanitized operational overview
Scope: Home lab monitoring, logging, and alert response planning
Evidence type: Monitoring documentation

## Purpose

This overview documents monitoring and alerting practices suitable for the home lab environment. It supports portfolio evidence for operational awareness, validation, and escalation discipline without claiming that a specific monitoring platform or alert result has been deployed unless separately proven.

## Objective

Define how lab monitoring should identify service availability, network path failures, recurring system health issues, backup uncertainty, and security-boundary events that require escalation.

## Technical Areas Demonstrated

- Proxmox host health review.
- pfSense interface, gateway, VPN, and firewall event monitoring.
- DNS/DHCP service health checks.
- Windows and Linux log review.
- Backup job status review.
- Alert prioritization, escalation, and RCA triggers.
- Evidence capture for troubleshooting and validation.

## Monitoring Philosophy

Monitoring should answer practical operational questions:

- Is the service available?
- Is the system healthy?
- Is the network path working?
- Is a recurring failure developing?
- Is the alert actionable?
- What evidence should be collected before remediation?

Good monitoring reduces guesswork. It should support troubleshooting and validation rather than create alert noise.

## Infrastructure Visibility

Recommended visibility areas:

- Proxmox host health and resource usage.
- pfSense interface status and firewall events.
- DNS and DHCP service health.
- Active Directory service availability.
- Windows and Linux system logs.
- Backup job status.
- Validation script results.
- Static site validation and deployment checks.

## Firewall Monitoring

pfSense monitoring should focus on:

- Interface status.
- Gateway health.
- Blocked traffic during troubleshooting windows.
- VPN connection events.
- Rule changes.
- Unexpected inter-zone traffic attempts.

Firewall logs should be used carefully. High-volume deny logs can hide useful events, so log review should focus on a specific hypothesis.

## DNS/DHCP Monitoring

DNS and DHCP monitoring should focus on:

- DNS service availability.
- Failed resolution patterns.
- DHCP scope utilization.
- Lease assignment failures.
- Reservation conflicts.
- Domain controller discovery issues where AD is in scope.

## System Health Validation

System health validation should include:

- CPU, memory, disk, and network utilization.
- Service status for critical lab roles.
- Event log review after changes.
- Patch or reboot follow-up checks.
- Backup job review.

## Log Review Practices

Effective log review should document:

- Time range.
- Affected system.
- Event source.
- Error codes.
- Related configuration changes.
- Follow-up action.

Avoid copying large logs into portfolio evidence. Summarize findings and retain the source evidence path.

## Alert Prioritization

| Priority | Condition | Action |
|---|---|---|
| Critical | Service unavailable or security boundary affected | Investigate immediately and preserve evidence |
| High | Repeated failure or multiple affected systems | Triage and escalate if scope expands |
| Medium | Single-system issue with workaround | Document and schedule remediation |
| Low | Informational or maintenance event | Review during routine operations |

## Operational Escalation Concepts

Escalate when:

- Multiple systems are affected.
- A security boundary is involved.
- DNS, DHCP, AD, VPN, or firewall behavior is unstable.
- Backup or restore capability is uncertain.
- A recurring issue needs root cause analysis.

## Evidence Still Needed

- Monitoring dashboard screenshot from the actual lab.
- Alert configuration export.
- Validation script output.
- Firewall log review sample from a real troubleshooting window.
- DNS/DHCP service health check record.