claude-memory/graph/problems/intermittent-ssl-connection-failures-from-internal-network-1d9b21.md
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id type title tags importance confidence created updated relations
1d9b21a0-4293-46a0-8be1-05414e641ce9 problem Intermittent SSL connection failures from internal network
networking
dns
ssl
troubleshooting
pihole
npm
0.7 0.8 2026-02-05T22:37:50.922156+00:00 2026-02-05T22:37:50.922156+00:00
target type direction strength
62b643f2-5ed7-4ea5-b87f-ef0687ad83ec SOLVES incoming 0.5

Symptom: ERR_SSL_UNRECOGNIZED_NAME_ALERT appears intermittently when accessing internal services (like Gitea, NPM proxy hosts) from allowed internal network (10.0.0.0/24, 10.10.0.0/24).

Pattern: Works fine for a while, then fails with SSL error, then works again. Access lists are correctly configured. Certificate is valid.

Key diagnostic clue: Issue occurs even from internal network where access should always work. DNS returns both IPv4 (internal) and IPv6 (Cloudflare) addresses.

Related to: Pi-hole DNS configuration, IPv6 preference in modern operating systems, split-horizon DNS, Cloudflare proxy configuration.