Ryan Malloy
f8363e5ea7
Wildcards in DNS only synthesize for names that don't already exist
in the zone tree. A `_acme-challenge.<sub>` TXT record makes <sub>
an "empty non-terminal" — exists in the tree (as a parent node) but
has no records of its own. Per RFC 4592 §2.2.3, wildcards skip these,
so RFC-compliant resolvers (HE, BIND) return NODATA for <sub> even
when the zone has `* CNAME @`.
Fix: for each <sub> that's an empty non-terminal in a zone with a
wildcard, add an explicit `<sub> CNAME @` so the resolution outcome
matches what the wildcard would have produced. Zero-knowledge — no
need to identify the specific service IP per name.
30 records added across 14 zones:
acrazy.org (langfuse.dootie)
context.bet (studio)
copper-springs.online (docs.butler.dev)
demostar.io (cw.cw, doom, meet)
home-inspector.store (api, dashboard, mailpit)
inspect.pics (admin)
log.doctor (app, docs)
malloys.us (cp, cp-sandbox, mary)
nielsen-inspections.com (calendar, cw, files, v2-calendar)
qubeseptic.com (api.dispatch, dispatch, leads, mail.dispatch,
rentcache.dispatch)
ryanmalloy.com (c4ai)
sidejob.pro (api)
upc.llc (catalog, minio.or, or, s3)
CoreDNS (lenient) was returning the wildcard CNAME for these names
anyway; HE (strict RFC-compliant) was returning empty. After this
change, both behave identically.
17 lines
623 B
Dns
17 lines
623 B
Dns
; Zone file for copper-springs.online
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; Generated by mcp-vultr
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$ORIGIN copper-springs.online.
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$TTL 3600
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300 IN NS ns1.vultr.com
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300 IN NS ns2.vultr.com
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300 IN A 74.91.22.234
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dev 300 IN CNAME rpm-bullet.mer.idahomuellers.net
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* 300 IN CNAME copper-springs.online
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*.dev 300 IN CNAME dev.copper-springs.online
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300 IN MX 10 copper-springs.online
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_acme-challenge.docs.butler.dev 300 IN TXT "JcIKn8HyUtQMwY_q0FNdj-XfacQS9Tn5SQiwTKB79VE"
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; Explicit CNAMEs added to fix RFC 4592 empty-non-terminal cases
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; (parent name has _acme-challenge children, so wildcard would skip it)
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docs.butler.dev 300 IN CNAME copper-springs.online
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