Troubleshoot IPv6 DNS Issues Skill

Systematic diagnosis and resolution of IPv6 DNS issues that cause clients to bypass local network access and connect via Cloudflare Tunnel with OAuth authentication.

Quick Start

Diagnose IPv6 DNS issue:

# Check if client is getting IPv6 addresses (should show ONLY IPv4)
getent ahosts ha.temet.ai

# Check Pi-hole is blocking IPv6 DNS responses
docker exec pihole nslookup -query=AAAA ha.temet.ai 127.0.0.1

# Check filter-AAAA is configured
docker exec pihole env | grep FTLCONF_misc_dnsmasq_lines