---
name: "ldns-notify"
section: "1"
platform: "linux"
package: "ldns"
version: "1.9.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/ldns-notify"
---

# ldns-notify(1)

notify DNS servers that updates are available

## NAME

ldns-notify - notify DNS servers that updates are available

## SYNOPSIS

**ldns-notify** \[options\] -z zone *servers*

## DESCRIPTION

**ldns-notify** sends a NOTIFY message to DNS servers. This tells them that an updated zone is available at the master servers. It can perform TSIG signatures and it can add a SOA serial number of the updated zone. If a server already has that serial number it will disregard the message.

## OPTIONS

- **-z zone**

  The zone that is updated.

- **-I address**

  Source IP to send query from.

- **-h**

  Show usage and exit

- **-v**

  Show the version and exit

- **-s serial**

  Append a SOA record indicating the serial number of the updated zone.

- **-p port**

  Use port as destination port (default the DNS port 53) for the UDP packets.

- **-y key:data\[:algo\]**

  Use the given TSIG key and base64-data, and optionally an algorithm to sign the NOTIFY. The algorithm defaults to hmac-md5.sig-alg.reg.int.

- **-d**

  Print verbose debug information. The query that is sent and the query that is received.

- **-r num**

  Specify the maximum number of retries before notify gives up trying to send the UDP packet.

## EXIT CODE

The program exits with a 0 exit code if all servers replied an  acknowledgement to the notify message, and a failure exit code otherwise.

## AUTHOR

Written by the ldns team as an example for ldns usage.

## REPORTING BUGS

Report bugs to \<dns-team@nlnetlabs.nl\>.

## COPYRIGHT

Copyright (C) 2005 NLnet Labs. This is free software. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.