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DNS & domains

Records, TTL, transfers, rDNS, DNSSEC, and troubleshooting.

  1. A vs AAAA vs CNAMEA vs AAAA vs CNAMEAn A record maps a name to IPv4, AAAA maps to IPv6, and CNAME aliases one name to another. Learn how to set them without leftover records or…Updated Aug 29, 2026
  2. MX, SPF, and TXT togetherMX, SPF, and TXT togetherAn MX record steers where mail is received. SPF is a TXT record that lists who may send. Keep both aligned with your real mail path so delivery…Updated Aug 29, 2026
  3. Nameserver change vs glueNameserver change vs glueA nameserver change at the registrar points the world at new DNS servers. Glue records are parent-zone A or AAAA data needed when those server names live inside…Updated Aug 29, 2026
  4. TTL strategy for cutoversTTL strategy for cutoversLower A and AAAA TTLs a day before a cutover, wait out the old TTL, change the records, watch resolution, then raise TTL again so caches converge cleanly.Updated Aug 29, 2026
  5. Domain transfer, lock, and EPPDomain transfer, lock, and EPPA domain transfer moves registration, not your site. Turn the lock off, use a fresh EPP code, and keep the old registrar open until the transfer finishes.Updated Aug 29, 2026
  6. Wildcard DNSWildcard DNSWildcard DNS is a *.example.com record that answers hostnames you did not create one by one. It is not a wildcard certificate, and AutoSSL will not cover every…Updated Aug 29, 2026
  7. rDNS and PTRrDNS and PTRA PTR record maps an IP address back to a hostname. Mail servers check it, so that name should resolve forward to the same IP and match your…Updated Aug 29, 2026
  8. DNSSEC in plain languageDNSSEC in plain languageDNSSEC signs your zone so forged DNS answers are harder to pull off. The DS at the parent must match the keys in the zone, or validators return…Updated Aug 29, 2026
  9. Split-horizon DNS and preview hostsSplit-horizon DNS and preview hostsSplit-horizon DNS returns different answers inside a network than on the public internet. A hosts file does the same on one laptop, so always compare local and public…Updated Aug 29, 2026
  10. Troubleshooting with digTroubleshooting with digUse dig against ns1 for the live zone, then a public resolver for cache TTL. +trace walks the tree when the NS set is unclear. Ping is not…Updated Aug 29, 2026
  11. CNAME flattening at the apexCNAME flattening at the apexCNAME flattening synthesizes A and AAAA at the bare domain because classic DNS forbids a CNAME there. On LogicWeb cPanel DNS, set A and AAAA yourself and keep…Updated Aug 29, 2026
  12. MX priority, without folkloreMX priority, without folkloreMX priority means lower numbers are tried first. Use a true queueing backup, remove dead MX names, and treat priority as preference—not speed or automatic failover.Updated Aug 29, 2026
  13. TXT records that are too longTXT records that are too longTXT records are stored in 255-byte chunks. Long SPF from flattening, duplicate DKIM, or bloated DMARC often break limits. Check dig output and keep one clean SPF at…Updated Aug 29, 2026
  14. NS at the registrar vs NS in the zoneNS at the registrar vs NS in the zoneThe registrar NS set is what the TLD publishes for your domain. Keep in-zone NS matching that set, and change nameservers at the registrar—not only in cPanel.Updated Aug 29, 2026
  15. Leftover AAAA recordsLeftover AAAA recordsA leftover AAAA after an IPv4 move sends dual-stack phones to the old server while office v4 Wi-Fi looks fine. Align AAAA with the new host or remove…Updated Aug 29, 2026
  16. SRV recordsSRV recordsAn SRV record points a named service to a hostname, port, priority, and weight. Enter vendor values exactly in cPanel; WordPress and browsers do not use SRV for…Updated Aug 29, 2026
  17. CAA issuewild vs issueCAA issuewild vs issueCAA issue covers hostnames; CAA issuewild covers wildcard certificates. Set both on purpose, or AutoSSL and some commercial CAs may refuse the cert you want.Updated Aug 29, 2026
  18. DS records at the parentDS records at the parentA DS record is the parent’s hash of your DNSSEC key. When it no longer matches the live DNSKEY, validators SERVFAIL. Enable, roll, and disable only with the…Updated Aug 29, 2026
  19. When to lower TTL — and when not toWhen to lower TTL — and when not toLower TTL a day before a planned DNS move so caches can expire in time. Do not drop it during an outage already cached, and raise it again…Updated Aug 29, 2026
  20. DNAME vs CNAME, and why you probably want neither at the apexDNAME vs CNAME, and why you probably want neither at the apexA real CNAME at the zone apex breaks MX and TXT at that same name. Prefer A or AAAA there, or flattening you can see in the panel,…Updated Aug 29, 2026
  21. Point Cloudflare at LogicWeb without breaking mailPoint Cloudflare at LogicWeb without breaking mailProxy only website A records through Cloudflare, leave MX and mail hostnames grey, and use SSL Full (strict) so AutoSSL on your LogicWeb origin keeps working.Updated Aug 29, 2026