Not sure if I missed something when I set up the PTR records for the hostnames on FreeIPAv4. We use FreeIPAv4 to manage the identity and policy on the LAN.
When I conducted the reverse DNS lookup against the reverse zone 2.10.10.in-addr.arpa, some returned domain names were appended with the reverse zone name, while others were not.
Here are two examples. 10.10.2.104 returned the hostname correctly, while 10.10.2.21 returned the hostname appended with the reverse zone name.
[[email protected] ~]# nslookup > nginx02.prd.example.com Server: 10.10.4.3 Address: 10.10.4.3#53 Name: nginx02.prd.example.com Address: 10.10.2.21 > 10.10.2.21 18.104.22.168.in-addr.arpa name = nginx02.prd.example.com.2.10.10.in-addr.arpa.
> tomcat.sbx.example.com Server: 10.10.4.3 Address: 10.10.4.3#53 Name: tomcat.sbx.example.com Address: 10.10.2.104 > 10.10.2.104 22.214.171.124.in-addr.arpa name = tomcat.sbx.example.com.
Can anyone shed some light on this? I tried several other tools, like dig and host, but I got the same results.