[Samba] DNS /16 reverse zone issues with children and octets

Paul Littlefield info at paully.co.uk
Tue Nov 3 10:24:24 UTC 2020


Hello Samba List,

I have 2 problems with dns - seeing the child entries and a zone with an extra octet.


First...


I have created a /16 reverse zone as per the wiki page (https://wiki.samba.org/index.php/DNS_Administration#To_create_a_.2F24_reverse_zone)...

$ samba-tool dns zonecreate dc3 130.130.in-addr.arpa

$ samba-tool dns zonelist --reverse dc3

   pszZoneName                 : 130.130.in-addr.arpa
   Flags                       : DNS_RPC_ZONE_DSINTEGRATED DNS_RPC_ZONE_UPDATE_SECURE
   ZoneType                    : DNS_ZONE_TYPE_PRIMARY
   Version                     : 50
   dwDpFlags                   : DNS_DP_AUTOCREATED DNS_DP_DOMAIN_DEFAULT DNS_DP_ENLISTED
   pszDpFqdn                   : DomainDnsZones.mydomain.com

$ samba-tool dns add dc3 130.130.in-addr.arpa 218.0 PTR dc3.mydomain.com
$ samba-tool dns add dc3 130.130.in-addr.arpa 219.0 PTR dc4.mydomain.com
$ samba-tool dns add dc3 130.130.in-addr.arpa 201.0 PTR server2.mydomain.com
etc

$ samba-tool dns query dc3 130.130.in-addr.arpa @ ALL

   Name=, Records=3, Children=0
     SOA: serial=32, refresh=900, retry=600, expire=86400, minttl=3600, ns=dc3.mydomain.com., email=hostmaster.mydomain.com. (flags=600000f0, serial=32, ttl=3600)
     NS: dc3.mydomain.com. (flags=600000f0, serial=1, ttl=3600)
     NS: dc4.mydomain.com. (flags=600000f0, serial=2, ttl=900)
   Name=0, Records=0, Children=15

How do I see the 'Children=15' entries using the samba-tool on the command line?



Next...


When this /16 reverse zone is viewed in the Windows DNS Manager GUI an extra octet appears in the IP address range and 3 question marks appear in a dialog box.

Name               Type             Data
130.130.0.0.218    Pointer (PTR)    dc3.mydomain.com



Fully qualified domain name (FQDN):
???.in-addr.arpa

Host name:
dc3.mydomain.com



The screenshot of the offending article is here:-

https://ibb.co/gPZy7Ry



$ apt-cache policy samba
samba:
   Installed: 2:4.7.6+dfsg~ubuntu-0ubuntu2.21




Hope you can help.


Regards,

Paully




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