• Bind
• DNS
• gpl
• gpl-2.0
• zone

check_dnsserials

Check your DNS is in sync (general icinga/icinga2/nagios plugin)

• Bind

check_nsupdate

• Bind
• bind9
• DNS
• python
• soa

check_soa_serials

Icinga2/Nagios plugin which compares the SOA serial numbers for the same DNS zone(s) from two different servers to ensure they are in sync