DNS /
IPv4 rDNS
In /var/nsd/etc/nsd.conf:
zone: name: "1.1.168.192.in-addr.arpa" zonefile: "master/1.1.168.192.in-addr.arpa"
In /var/nsd/zones/master/1.1.168.192.in-addr.arpa:
$ORIGIN 1.1.168.192.in-addr.arpa. @ 3600 IN SOA ns1.username.example.com. admin.username.example.com. ( 2021072300 ; serial YYYYMMDDnn 3600 ; refresh 3600 ; retry 86400 ; expire 3600 ) ; minimum TTL 3600 IN NS ns1.username.example.com. 3600 IN NS ns2.username.example.com. @ 3600 IN PTR username.example.com.