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technitium: mirror most.viktorbarzin.me into the internal zone (CF Pages site)
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The internal split-horizon zone is authoritative for viktorbarzin.me,
so the new Cloudflare Pages site (most.viktorbarzin.me, added for
Viktor's 'мост' school static site) NXDOMAINed for every internal
client — LAN, VLANs and pods — while resolving fine externally.
Per the superset rule, add it as a static CNAME (-> most-6if.pages.dev)
in the ingress-dns-sync CronJob next to the mail-auth records, and
document the off-infra-site case in dns.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Viktor Barzin 2026-07-03 10:10:46 +00:00
parent 217a54be9d
commit 7dd80b6c7c
2 changed files with 9 additions and 1 deletions
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2
docs/architecture/dns.md
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@ -277,7 +277,7 @@ Technitium's **Split Horizon AddressTranslation** app post-processes DNS respons
Config is synced to all 3 Technitium instances by CronJob `technitium-split-horizon-sync` (every 6h). Config is synced to all 3 Technitium instances by CronJob `technitium-split-horizon-sync` (every 6h).
**Superset rule for the internal `viktorbarzin.me` zone**: it is authoritative for every internal client (pods included since 2026-06-10), so it must carry every record type those clients consume — not just ingress A/CNAMEs. The `technitium-ingress-dns-sync` CronJob therefore also maintains the static **mail-auth records** (apex SPF + brevo-code TXT, MX → mail.viktorbarzin.me, `_dmarc`, `mail._domainkey` DKIM), mirrored from the public Cloudflare zone. Without them, rspamd on the mailserver saw `SPF=none` for inbound `@viktorbarzin.me` mail and quarantined it (broke the Brevo email-roundtrip probe, 2026-06-10). If these records change in Cloudflare, update the sync script too. **Superset rule for the internal `viktorbarzin.me` zone**: it is authoritative for every internal client (pods included since 2026-06-10), so it must carry every record type those clients consume — not just ingress A/CNAMEs. The `technitium-ingress-dns-sync` CronJob therefore also maintains the static **mail-auth records** (apex SPF + brevo-code TXT, MX → mail.viktorbarzin.me, `_dmarc`, `mail._domainkey` DKIM), mirrored from the public Cloudflare zone. Without them, rspamd on the mailserver saw `SPF=none` for inbound `@viktorbarzin.me` mail and quarantined it (broke the Brevo email-roundtrip probe, 2026-06-10). If these records change in Cloudflare, update the sync script too. The same applies to **off-infra sites** (e.g. `most` → CNAME `most-6if.pages.dev`, Cloudflare Pages): any public-only name with no Traefik ingress must be added as a static record in the sync script, or internal clients NXDOMAIN on it while it works fine externally.
## NodeLocal DNSCache ## NodeLocal DNSCache

8
stacks/technitium/modules/technitium/main.tf
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@ -1002,6 +1002,14 @@ resource "kubernetes_cron_job_v1" "technitium_ingress_dns_sync" {
echo "mail-auth: MX present" echo "mail-auth: MX present"
fi fi
# Off-infra sites on Cloudflare Pages: the internal zone is
# authoritative (superset rule above), so public-only names
# with no Traefik ingress must be mirrored here or every
# internal client (LAN, VLANs, pods) gets NXDOMAIN for them.
# Target is the pages.dev host — resolves via upstream to CF
# edge IPs; normal egress, no hairpin involved.
add_cname "most.$$ZONE" "most-6if.pages.dev"
# Pin the .lan ingress anchor A record to the LIVE Traefik LB IP. # Pin the .lan ingress anchor A record to the LIVE Traefik LB IP.
# *.viktorbarzin.lan ingress hosts CNAME to ingress.viktorbarzin.lan, # *.viktorbarzin.lan ingress hosts CNAME to ingress.viktorbarzin.lan,
# so a Traefik LB IP move that misses the .lan zone silently breaks # so a Traefik LB IP move that misses the .lan zone silently breaks