Comprehensive Pi-hole v6.x Setup, Fixes & FAQ Guide (Debian Bookworm/Trixie/Raspberry Pi OS)
Languages: 🇬🇧 English (this file) • 🇩🇪 Deutsch
This repository is a completely new, centralized hub for resolving common Pi-hole v6.x issues, built from the ground up to address repetitive problems seen in r/pihole and official Discourse threads. It expands on the original Pi-hole v6.0 Guide by incorporating:
- Updated for v6.1.4+ (latest core release: July 14, 2025; FTL v6.1: March 30, 2025; Web v6.2: May 30, 2025): Includes built-in web server fixes, FTL database migrations, and post-v6.1 bugfixes for DNS resolution and UI stability.
- Reddit Sticky FAQs: Integrated top-voted questions from r/pihole to prevent reposts.
- 2025-Specific Fixes: DNS failures post-upgrade, 403 Forbidden on admin UI, missing pihole.toml, Docker migration issues, and Unbound conflicts.
- Verified Links: All external links checked (Umbrella KB updated; no 404s).
- New Scripts: Ready-to-run fixes for DB corruption, GUI slowdowns, backups, and v6 upgrades.
- Companion Repos:
- For automated full-stack setup (Pi-hole + Unbound + NetAlertX): Pi-hole-Unbound-PiAlert-Setup – One-click install with DNSSEC and monitoring.
- For maintenance: pihole-maintenance-pro – Automated updates, backups, and health checks (v5.3.2, Oct 10, 2025).
Search r/pihole first for duplicates—many answers link back here or to Pi-hole Discourse (official support).
Repo Structure (New & Expanded):
README.md/README.de.md: This guide.scripts/: Automated fixers (e.g.,fix-ftl-db.sh,optimize-gui.sh,v6-upgrade-check.sh).docs/: Deep dives (e.g., IPv6 bypass, DoH/DoT blocks, Docker migrations).lists/: Curated 2025 blocklists (e.g., updated Firebog integrations).LICENSE: MIT..github/workflows/: CI for sanity checks.
curl -sSL https://install.pi-hole.net | bashPost-Install (v6.1+ Specific):
-
Access Admin UI:
http://<IP>/admin/(built-in server; no lighttpd needed; check port 80/8080 if 403 error). -
Change password:
sudo pihole -a -p. -
Verify:
dig pi.hole @<PIHOLE-IP>. -
New: Check for v6 DB migration & toml issues:
sudo pihole -r # Repair if FTL fails or no pihole.toml sudo systemctl status pihole-FTL # Ensure no high CPU or DNS failure
Companion Setup Tip: For Unbound integration, use Pi-hole-Unbound-PiAlert-Setup after basic install.
sudo apt update && sudo apt upgrade -y
sudo pihole -up # Auto-handles v6.1+ upgrades; watch for DNS failures
sudo pihole -g
sudo pihole restartdnsv6 Tip: Enable auto-backups before updates to avoid DB/toml corruption:
sudo mkdir -p /var/backups/pihole
sudo tee -a /etc/pihole/pihole-FTL.conf >/dev/null <<'EOF'
BACKUP_DIR=/var/backups/pihole
EOF
sudo systemctl restart pihole-FTLAutomated Option: Integrate pihole-maintenance-pro for cron-based runs.
| Problem | Cause (v6.1+ Specific) | Fix |
|---|---|---|
| Lists not downloading | Upstream DNS outage or IPv6 misconfig | Run sudo pihole -g; check /etc/resolv.conf; test IPv6: ping6 google.com. |
| Only router as client | Router forwards all DNS | Enable Pi-hole DHCP; disable router DNS rebinding. Script: scripts/enable-dhcp.sh. |
| YouTube ads not blocked | Ads from video domains | Not feasible via DNS; use uBlock Origin. |
| Blocked sites fail to load | Overblocking (e.g., new CDNs) | Query Log whitelist; add 2025 whitelists from lists/. |
| Port 53 conflict | systemd-resolved or unbound | sudo systemctl disable --now systemd-resolved. |
| FTL DB corruption post-update | v6.1 migration bug | Rename DB: sudo mv /etc/pihole/pihole-FTL.db /etc/pihole/pihole-FTL.db.bak; sudo pihole restartdns. Script: scripts/fix-ftl-db.sh. |
| Slow GUI / High CPU (30-70%) | Built-in server overload on Pi Zero/3 | Limit DB: MAXDBDAYS=14 in pihole-FTL.conf; reduce blocklists. Script: scripts/optimize-gui.sh. |
| Freezes multiple times/day | Memory leak in FTL v6.0.x | Reinstall + restore config: sudo pihole uninstall; curl install; Teleporter restore. |
| Connection/UDP/NTP errors | v6 sync issues | timedatectl set-ntp true; check upstream DNS (e.g., 1.1.1.1). |
| No internet after v6 upgrade | DHCP/DNS loop | Set Pi-hole IP as sole DNS in router; sudo pihole flush. |
| Web UI inaccessible (403 Forbidden) | v6.1 built-in server perms or port issues | Try http://<IP>:8080/admin/; sudo pihole -r; check /etc/pihole/pihole.toml. Script: scripts/fix-ui-403.sh. |
| DNS Server Failure | Unbound/upstream conflicts post-v6.1 | Verify upstream in UI; dig @127.0.0.1 -p 5335 example.com if using Unbound. See Pi-hole-Unbound-PiAlert-Setup. |
| Missing pihole.toml after upgrade | v6.1 config migration fail | pihole -r --reconfigure; restore from backup. |
| Docker v5 to v6 migration issues | Env vars like WEBPASSWORD or dnsmasq changes | Update compose: Use -e WEBPASSWORD; remap volumes; test DHCP statics in new conf. See docs/docker-v6.md. |
Run Debug: pihole -d for token; share on Discourse.
Note on permissions: Most Pi-hole CLI commands require root privileges. Example: sudo pihole -t for live tail.
| Question | Short Answer | Source |
|---|---|---|
| How to block YouTube ads? | Not possible with Pi-hole (use browser extensions). | Discourse #253 |
| Unusual DNS queries (e.g., gibberish like "z9d8ejfsdsdf9")? | Chrome prefetching; harmless. | Umbrella KB (Updated 2025) |
| Why ads/content not loading? | Identify domain via Query Log. | Discourse #1522 |
| How to configure devices for Pi-hole? | Set DNS on devices/router or use Pi-hole DHCP. | Discourse #245 |
| Router blocks DNS changes? | Use Pi-hole DHCP; disable rebind protection. | Discourse #3026, #3142 |
| All DNS from router? | Enable Pi-hole DHCP for per-client visibility. | Discourse #3653 |
| Secondary DNS recommended? | No—use Pi-hole only to avoid bypasses. | Discourse #3376, #1536 |
| Exclude clients from blocking? | Use Group Management (v6 enhanced). | Discourse #3372 |
| Run other software with Pi-hole? | Yes, but monitor resources (e.g., no heavy VMs on Pi Zero). | Discourse #8684 |
| Add blocklists? | GUI: Group Management → Adlists (2025: Use Firebog for curated). | Discourse #259; See lists/2025-firebog.txt |
| Restore default adlists? | sudo pihole -g --reset; or manual via gravity. |
Discourse #32323 |
| Remote access (open Port 53?)? | No—use VPN (Tailscale/WireGuard). | Discourse #13705 |
| New: DoH/DoT bypass in v6? | Devices use encrypted DNS. | Block domains like dns.google; redirect Port 853 via iptables. See docs/ipv6-doh.md. |
| New: High memory on v6? | Large FTL DB. | Set MAXDBDAYS=30; prune: sudo pihole vacuum. |
| New: DNS failure after v6.1 upgrade? | Upstream/Unbound misconfig. | Reconfigure upstream; test with dig. Use Pi-hole-Unbound-PiAlert-Setup for robust Unbound. |
| New: Admin panel login/update issues? | v6.1 perms or NGINX conflicts. | pihole -r; disable custom NGINX. |
Full Sticky List: See r/pihole Wiki for more.
# Gravity refresh
sudo pihole -g
# Live log
sudo pihole -t
# Query domain
sudo pihole -q example.com
# Restart (v6: Use restartdns for lighter reload)
sudo pihole restartdns
# v6 DB/toml check/fix
sudo sqlite3 /etc/pihole/pihole-FTL.db "PRAGMA integrity_check;"
sudo ls -la /etc/pihole/pihole.toml # Verify existence
# Flush cache
sudo pihole flush
# Test upstream (Unbound)
dig @127.0.0.1 -p 5335 example.comDocker hint: Inside containers Pi-hole runs as root, so run commands without sudo. From the host you can exec into the container, e.g. docker exec -it <pihole-container> pihole -g.
Scripts Usage:
./scripts/fix-high-cpu.sh: Optimizes for Pi 3/Zero../scripts/backup-restore.sh: Teleporter + manual../scripts/v6-upgrade-check.sh: Scans for common post-upgrade issues.
Maintenance Tip: Run via pihole-maintenance-pro for automated health checks.
- Never expose WAN: Use VPN for remote.
- Auto-Updates:
unattended-upgrades+ cron forsudo pihole -up. - Backups: Daily via Teleporter; store offsite. Use
--backupflag in maintenance scripts. - v6.1 New: Enable audit logging:
AUDITLOG=trueinpihole-FTL.conf; verify pihole.toml perms. - Blocklists 2025: Start with defaults +
lists/home-2025.txt(avoids overblocking). - Full Stack: For Unbound + monitoring, deploy Pi-hole-Unbound-PiAlert-Setup – Includes API for stats and DNSSEC.
Cron Example (Weekly Maintenance):
0 4 * * 0 /usr/local/bin/pihole_maintenance_pro.sh >> /var/log/pihole_maint.log 2>&1(From pihole-maintenance-pro.)
Before posting on r/pihole or Discourse: Search here first! If stuck, run pihole -d and share the token.
Support this hub: ☕ Buy me a coffee (Valid profile; supports ongoing updates.)
Fork/Contribute: PRs for new fixes welcome (e.g., v6.2 previews or Docker issues).
Maintainer: TimInTech Last Updated: 2025-10-12 Version: v6.1.1 (Hub) License: MIT
- IPv6 Bypass:
docs/ipv6-doh.md– Fixes for Android/iOS DoH. - Pi Zero W Guide:
docs/pi-zero-v6.md– Lightweight config for slow hardware. - Docker v6 Migration:
docs/docker-v6.md– Env vars, volumes, and static DHCP. - Router DNS Setup:
docs/router-dns.md– FRITZ!Box, UniFi, Asus, OpenWrt Anleitungen & Links. - Unbound Integration: Links to Pi-hole-Unbound-PiAlert-Setup for API/device monitoring.
- Changelog Sync: Mirrors Pi-hole Releases.
For German version: See README.de.md (translated FAQs + commands). If you spot issues or need expansions, open an issue!