Allxfr performs DNS zone transfers (AXFR) against nameservers to retrieve complete zone files. The tool systematically attempts zone transfers against root zone servers and other configured nameservers to discover available zone data.
The program supports both IPv4 and IPv6 connections and includes options for parallel transfers, dry-run operations, and zone file storage. It implements the DNS AXFR protocol to request complete zone transfers from authoritative nameservers that permit such operations.