[Samba] How to delete an unwanted NS record

[Rowland penny]

On 07/07/2020 20:00, James B. Byrne via samba wrote:
> I have this on the DC smb4-1.brockley.harte-lyne.ca:
>
> samba-tool dns query localhost brockley.harte-lyne.ca brockley.harte-lyne.ca
> ALL -U administrator
> Password for [BROCKLEY\administrator]:
>    Name=, Records=6, Children=0
>      SOA: serial=7, refresh=900, retry=600, expire=86400, minttl=3600,
> ns=SMB4-1.brockley.harte-lyne.ca., email=support.harte-lyne.ca.
> (flags=600000f0, serial=110, ttl=3600)
>      NS: SMB4-1.brockley.harte-lyne.ca. (flags=600000f0, serial=110, ttl=900)
>      NS: smb4-2.brockley.harte-lyne.ca. (flags=600000f0, serial=110, ttl=900)
>      A: 192.168.18.161 (flags=600000f0, serial=110, ttl=900)
>      A: 192.168.18.162 (flags=600000f0, serial=110, ttl=900)
>      A: 192.168.216.162 (flags=600000f0, serial=110, ttl=900)
>    Name=_msdcs, Records=0, Children=0
>    Name=_sites, Records=0, Children=1
>    Name=_tcp, Records=0, Children=4
>    Name=_udp, Records=0, Children=2
>    Name=DomainDnsZones, Records=0, Children=2
>    Name=ForestDnsZones, Records=0, Children=2
>    Name=smb4-1, Records=1, Children=0
>      A: 192.168.18.161 (flags=f0, serial=110, ttl=900)
>    Name=SMB4-2, Records=2, Children=0
>      A: 192.168.18.162 (flags=f0, serial=110, ttl=900)
>      A: 192.168.216.162 (flags=f0, serial=110, ttl=900)
>
> 192.168.216.162 is an aliased IP on 192.168.18.162 which points to
> smb4-2.internal.harte-lyne.ca.
>
> host -t A smb4-2.internal.harte-lyne.ca
> smb4-2.internal.harte-lyne.ca has address 192.168.216.162
>
> host -t PTR 192.168.216.162
> 162.216.168.192.in-addr.arpa domain name pointer smb4-2.internal.harte-lyne.ca.
>
> I can get rid of the A record, at least temporarily, with:
>
> samba-tool dns delete localhost brockley.harte-lyne.ca smb4-2 A 192.168.216.162
> -U administrator
> Password for [BROCKLEY\administrator]:
> Record deleted successfully
>
>
> How do I get rid of the 192.168.216.162 NS record while leaving 192.168.18.162?
>   I cannot determine the correct syntax for the 'samba-tool dns delete' command.
>
>
> samba-tool dns delete localhost brockley.harte-lyne.ca @ NS
> smb4-2.internal.harte-lyne.ca
> Password for [administrator at BROCKLEY.HARTE-LYNE.CA]:
> ERROR(runtime): uncaught exception - (9701,
> 'WERR_DNS_ERROR_RECORD_DOES_NOT_EXIST')
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/__init__.py", line
> 185, in _run
>      return self.run(*args, **kwargs)
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/dns.py", line 1071,
> in run
>      raise e
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/dns.py", line 1067,
> in run
>      del_rec_buf)
>
>
> samba-tool dns delete localhost brockley.harte-lyne.ca @ NS 192.168.216.162
> Password for [administrator at BROCKLEY.HARTE-LYNE.CA]:
> ERROR(runtime): uncaught exception - (9701,
> 'WERR_DNS_ERROR_RECORD_DOES_NOT_EXIST')
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/__init__.py", line
> 185, in _run
>      return self.run(*args, **kwargs)
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/dns.py", line 1071,
> in run
>      raise e
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/dns.py", line 1067,
> in run
>      del_rec_buf)
>
How many DC's do you have ?

If it is two, SMB4-1 and smb4-2, then stop trying to remove smb4-2, it 
is a valid NS record, the only invalid record is the 192.168.216.162 A 
record.

Rowland