05-13-2010
Yes, client is on known port. I don't have a problem with this part of code, I managed to send and receive in both ways.
Why do you think select is a better choice? I
Thank you for the advice and link. I will go back to reading.
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LEARN ABOUT FREEBSD
nsd-xfer
nsd-xfer(8) nsd 3.2.12 nsd-xfer(8)
NAME
nsd-xfer - AXFR client to transfer zones from a name server
SYNOPSIS
nsd-xfer [-4] [-6] [-a address[@port]] [-p port] [-s serial] [-T tsiginfo] [-v] -z zone -f file servers
DESCRIPTION
Nsd-xfer is program to transfer zones from a name server using AXFR. NSD is a complete implementation of an authoritative DNS nameserver.
OPTIONS
-4 Only send to IPv4 addresses.
-6 Only send to IPv6 addresses.
-a address[@port]
Specify the source address (and port) to send from.
-f file
The file to store the zone in.
-p port
Specify the port to send to.
-s serial
Specify the serial of the current zone. The zone is only transferred if the master server has a zone with a greater serial number.
-T tsiginfo
Use TSIG to verify the zone transfer. The tsiginfo 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).
-v Be more verbose.
-z zone
Specify the zone to receive.
servers
List of nameservers to try.
EXAMPLES
To run this program the standard way type:
# nsd-xfer -z foobar.cz -f foobar.cz.zone 1.2.3.4
SEE ALSO
nsd(8), nsdc(8), nsd.conf(5), nsd-checkconf(8), nsd-notify(8), nsd-patch(8), zonec(8)
AUTHORS
NSD was written by NLnet Labs and RIPE NCC joint team. Please see CREDITS file in the distribution for further details.
NLnet Labs jul 19, 2012 nsd-xfer(8)