samba - Nov 2021 - How to use samba-tool dns to manually add a PTR record

Here is the relevant docstring:

root at atomsmasher:~# samba-tool dns add -h
Usage: samba-tool dns add <server> <zone> <name> 
<A|AAAA|PTR|CNAME|NS|MX|SRV|TXT> <data>

Add a DNS record

For each type data contents are as follows:
   A      ipv4_address_string
   AAAA   ipv6_address_string
   PTR    fqdn_string
   CNAME  fqdn_string
   NS     fqdn_string
   MX     "fqdn_string preference"
   SRV    "fqdn_string port priority weight"
   TXT    "'string1' 'string2' ..."


What does "fqdn_string" mean?  Because I tried this:

root at samba-dc:~# samba-tool dns add samba-dc ea.linuxcs.com atomsmasher 
PTR atomsmasher.ea.linuxcs.com

and it didn't work:

root at samba-dc:~# host atomsmasher
atomsmasher.ea.linuxcs.com has address 192.168.1.82
root at samba-dc:~# host 192.168.1.82
Host 82.1.168.192.in-addr.arpa. not found: 3(NXDOMAIN)


Also tried:

root at samba-dc:~# samba-tool dns add samba-dc ea.linuxcs.com atomsmasher 
PTR 82.1.168.192.in-addr.arpa

and

root at samba-dc:~# samba-tool dns add samba-dc ea.linuxcs.com atomsmasher 
PTR 192.168.1.82

which also didn't work.

On Thu, 2021-11-04 at 12:59 -0500, Patrick Goetz via samba
wrote:
> Here is the relevant docstring:
> 
> root at atomsmasher:~# samba-tool dns add -h
> Usage: samba-tool dns add <server> <zone> <name> 
> <A|AAAA|PTR|CNAME|NS|MX|SRV|TXT> <data>
> 
> Add a DNS record
> 
> For each type data contents are as follows:
>    A      ipv4_address_string
>    AAAA   ipv6_address_string
>    PTR    fqdn_string
>    CNAME  fqdn_string
>    NS     fqdn_string
>    MX     "fqdn_string preference"
>    SRV    "fqdn_string port priority weight"
>    TXT    "'string1' 'string2' ..."
> 
> 
> What does "fqdn_string" mean?  Because I tried this:
> 
> root at samba-dc:~# samba-tool dns add samba-dc ea.linuxcs.com
> atomsmasher 
> PTR atomsmasher.ea.linuxcs.com
> 
> and it didn't work:
You got the '<data>' correct, but you got the
'<zone>' and '<name>'
wrong

You are adding a PTR record and this is added to your reverse zone, the
one that ends in 'arpa'. The '<name>' in this case is the
IP, so your
command should be:

samba-tool dns add samba-dc 1.168.192.in-addr.arpa 82 PTR
atomsmasher.ea.linuxcs.com

Rowland