AXFR / IXFR (Zone Transfer)
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://tldfyi.com/iframe/glossary/axfr/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://tldfyi.com/glossary/axfr/Add a dynamic SVG badge to your README or docs.
[](https://tldfyi.com/glossary/axfr/)Use the native HTML custom element.
AXFR (Authoritative Zone Transfer, RFC 5936) is the protocol for transferring a complete copy of a [[zone-file|DNS zone]] from a primary to a secondary [[nameserver]]. IXFR (Incremental Zone Transfer, RFC 1995) transfers only changes since the last synchronization, reducing bandwidth. Zone transfers must be secured with [[tsig|TSIG]] or IP allowlisting, as an open AXFR exposes the full DNS record inventory to any requester — a common information-disclosure vulnerability.
Example
Running `dig AXFR example.com @ns1.example.com` requests a full zone transfer — if the server is misconfigured, it returns every DNS record in the zone, exposing infrastructure details.