is program to transfer zones from a name server using AXFR.
is a complete implementation of an authoritative DNS nameserver.
Only send to IPv4 addresses.
Only send to IPv6 addresses.
Specify the source address (and port) to send from.
The file to store the zone in.
Specify the port to send to.
Specify the serial of the current zone. The zone is only transferred
if the master server has a zone with a greater serial number.
Use TSIG to verify the zone transfer. The
file must contain the TSIG key information. The file is removed
upon successful reading of the key. The format of the tsiginfo file
is described in the doc/README file (section 3.3).