NSD Zone Files
Adding records to zone files
Suppose you want to create an entry for
First, open up the file
/var/nsd/zones/master/example.com and add these two lines:
subdomain 3600 IN A 184.108.40.206 3600 IN AAAA 2602:fccf:1:1008::
Then, you will want to update the serial number in the Start of Authority record:
$ORIGIN example.com. example.com. 3600 SOA ns1.example.com. admin.example.com. ( 2021072701 ; serial YYYYMMDDnn 1800 ; refresh 3600 ; retry 86400 ; expire 3600 ) ; minimum TTL
The serial number in a zone file is written in this form:
YYYY is the year,
MM is the month,
DD is the day, and
nn are two digits.
2021072701 tells us that this zone was written on July 27th, 2021.
It was the 1st edit of that day.
After you add records, make sure to increase the serial number to the correct day. If multiple edits are made on the same day, increase the two-digit number by one.
doas nsd-control reload to reload the zone files.
Test the Results
After you update the zone file, make sure to test that the record has been updated:
$ host subdomain.example.com example.com has address 192.168.0.1 example.com has IPv6 address 2001:db8::
See the FQDN section.
Start of Authority
The start of authority record:
example.com. 3600 SOA ns1.example.com. admin.example.com. (
ns1.example.com. needs to be replaced by the nameserver responsible for this zone.
admin.example.com. means that the email for the sysadmin responsible for this zone is
firstname.lastname@example.org. Note that the @ ("at") symbol is replaced with a period.