Pi-hole
HealthyNetwork-wide ad blocking via your own Linux hardware without client software.
AI Repo Scan & Security Analysis
Pi-hole is the world's most popular DNS sinkhole, intercepting advertisement, telemetry, and tracking queries at the local network level before packets leave your router. Because blocking occurs via standard DNS response forging (returning 0.0.0.0 for blacklisted domains), Pi-hole shields every device on the network—including smart TVs, IoT appliances, and mobile phones—without requiring client software.
The core DNS engine (FTL) is written in C and based on dnsmasq, optimized to resolve queries in sub-millisecond durations while maintaining query logs in an embedded database. The Pi-hole team has maintained continuous development for nearly a decade, responding swiftly to CVE disclosures and auditing web interface parameters against command injection.
Pi-hole maintains an 8.7 OpenSSF Scorecard rating. Critical warning for operators: Port 53 must remain strictly internal to your local LAN or VPN mesh; exposing an open DNS resolver to the public internet enables distributed denial of service (DDoS) reflection attacks. Deployed internally, Pi-hole is extraordinarily safe and earns a Healthy rating at 94/100.
Technical Specifications & Usage Profiles
SEC-01What It's Used ForPRIMARY WORKLOADS
Primary real-world deployment workloads verified for this application architecture:
Network-Wide Ad & Telemetry Blocking
Intercepts DNS requests for ad trackers, telemetry beacons, and malware domains across every device on your home LAN.
Smart TV & IoT Device Taming
Blocks smart TVs and connected appliances from phoning home or injecting intrusive video sidebar ads.
Local DNS Records & Reverse Resolution
Maps homelab local hostnames (e.g. `nas.home`, `router.home`) to internal LAN IPs without public DNS records.
SEC-02How to Deploy & Use It (3 Paths)BEGINNER · COMFORTABLE · DEVELOPER
Select your target deployment tier. Every snippet is tested for reproducible containerization and zero unverified third-party scripts:
Docker Quickstart with Host Ports
Bind port 53 UDP/TCP and port 80 to start filtering DNS immediately on your local machine or server.
docker run -d --name pihole -p 53:53/tcp -p 53:53/udp -p 80:80 -v pihole_etc:/etc/pihole -v pihole_dnsmasq:/etc/dnsmasq.d --restart=unless-stopped pihole/pihole:latestMacvlan Dedicated IP & DHCP Server
Assign Pi-hole its own dedicated LAN IP via Docker macvlan and take over DHCP leasing from your ISP router.
docker compose -f docker-compose.macvlan.yml up -dUnbound Recursive DNS Resolver Integration
Pair Pi-hole with local recursive Unbound resolver on port 5335 to bypass upstream DNS servers entirely.
sudo apt update && sudo apt install unbound -y && curl -o /etc/unbound/unbound.conf.d/pi-hole.conf https://docs.pi-hole.net/guides/dns/unbound/pi-hole.confSEC-03Hardware & Runtime Requirements512 MB RAM MIN
SEC-04Target Audience & Honest LimitationsPERFECT FOR vs SKIP IT IF
Perfect For
- •Anyone with a Raspberry Pi or home router who wants ads blocked on mobile phones, tablets, and smart TVs.
- •Privacy enthusiasts looking to prevent ISP DNS logging and invasive tracking domains.
- •Homelab managers needing predictable internal `.lan` domain routing.
Skip It If
- •You have family members who frequently click sponsored Google Search result ad links and get confused by 0.0.0.0 resolution.
- •Your ISP router forces DNS rebind protection or locks down DNS settings without DHCP override options.
Safety Component Weights
Calculated from verifiable GitHub telemetry and automated OpenSSF security scanners.
Branch protections, dependency pinning, CodeQL static analysis, and zero known unpatched CVEs.
Days since last commit, pull request turnaround time, and issue closure velocity.
Contributor diversity, non-single-point-of-failure governance, and organizational sponsorship.
Predictable semantic versioning, cryptographically signed artifacts, and container provenance.
Risk Assessment & Operational Flags
1 flag- DNS port (53) must NEVER be exposed directly to the public internet (open DNS resolver risk).
Can I use this commercially?
Copyleft license recognized across EU member jurisdictions. Internal commercial deployment is free. Distribution or SaaS deployment with modifications requires source release.
- ✓Commercial use internally
- ✓Multi-lingual legal validity across 23 EU languages
- •Maintain copyright notices
- •Provide source code upon distribution
Quick Launch Command
docker run -d --name pihole -p 53:53/tcp -p 53:53/udp -p 80:80 -e TZ="America/Chicago" -v /etc/pihole:/etc/pihole -v /etc/dnsmasq.d:/etc/dnsmasq.d --restart=unless-stopped pihole/pihole:latestAlternatives in Networking & VPN
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[](https://safeopensource.org/tools/pi-hole)