DNS request
A device requests a domain name before making a connection.
SecOps Prevention Control
Network-wide DNS filtering before connections are made.
Pi-hole acts as a lightweight preventative control for the homelab, filtering DNS requests for advertising, tracking and other unwanted domains before client devices establish a connection.
Why It Matters
Reduce unwanted connections at the first step.
DNS is where many client connections begin. Filtering known unwanted domains at this stage reduces advertising and tracking traffic across all connected devices without configuring each device individually.
It is not a replacement for endpoint protection, patching or threat detection. Instead, Pi-hole provides a simple preventative layer that supports the wider SecOps capability. Its non-secret operational scripts, systemd units, active adlist declaration and Unbound overrides are now Git-owned, while query databases and credentials remain excluded.
Operating Flow
Prevention through DNS control.
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Policy check
Pi-hole checks the request against configured blocklists and local rules.
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Allow or prevent
Known unwanted domains are not resolved; permitted services continue normally.
Operational Evidence
A preventative control that can be measured.
Query visibility
DNS request volume and filtering activity provide a clear view of service use.
Blocklist health
Monitoring confirms that the filtering data and service are available.
Git-owned recovery source
Operational scripts, systemd units, adlists and Unbound overrides provide reviewable recovery input without storing live DNS history or secrets.