[Samba] DNS Help Request

Sat Sep 10 19:04:42 UTC 2022

>From my DC (DC01):
[Sat Sep 10 14:58:30] [root at DC01~$] host dc01
dc01 has address 10.0.0.10
[Sat Sep 10 14:58:33] [root at DC01~$] host dc01.home.rob-campbell.lan
Host dc01.home.rob-campbell.lan not found: 3(NXDOMAIN)
[Sat Sep 10 14:58:38] [root at DC01~$] host 10.0.0.10
10.0.0.10.in-addr.arpa domain name pointer DC01.
[Sat Sep 10 14:58:45] [root at DC01~$] nslookup dc01
Server: 10.0.0.1
Address: 10.0.0.1#53

Name: dc01
Address: 10.0.0.10

[Sat Sep 10 14:59:06] [root at DC01~$] nslookup dc01.home.rob-campbell.lan
Server: 10.0.0.1
Address: 10.0.0.1#53

** server can't find dc01.home.rob-campbell.lan: NXDOMAIN

[Sat Sep 10 14:59:18] [root at DC01~$] host dc02
Host dc02 not found: 3(NXDOMAIN)
[Sat Sep 10 15:00:58] [root at DC01~$] host dc02.home.rob-campbell.lan
Host dc02.home.rob-campbell.lan not found: 3(NXDOMAIN)
[Sat Sep 10 15:01:06] [root at DC01~$] host 10.0.0.9
Host 9.0.0.10.in-addr.arpa. not found: 3(NXDOMAIN)
[Sat Sep 10 15:01:12] [root at DC01~$] nslookup dc02
Server: 10.0.0.1
Address: 10.0.0.1#53

** server can't find dc02: NXDOMAIN

[Sat Sep 10 15:01:21] [root at DC01~$] nslookup dc02.home.rob-campbell.lan
Server: 10.0.0.1
Address: 10.0.0.1#53

** server can't find dc02.home.rob-campbell.lan: NXDOMAIN

>From my workstation DC02:

[Sat Sep 10 14:59:47] [root at dc02~$] host dc01
dc01.HOME.ROB-CAMPBELL.LAN has address 10.0.0.10
dc01.HOME.ROB-CAMPBELL.LAN has IPv6 address 2600:4040:4666:f900::1bac
[Sat Sep 10 14:59:58] [root at dc02~$] host dc01.home.rob-campbell.lan
dc01.home.rob-campbell.lan has address 10.0.0.10
dc01.home.rob-campbell.lan has IPv6 address 2600:4040:4666:f900::1bac
[Sat Sep 10 15:00:10] [root at dc02~$] host 10.0.0.10
Host 10.0.0.10.in-addr.arpa. not found: 3(NXDOMAIN)
[Sat Sep 10 15:00:16] [root at dc02~$] nslookup dc01
Server: 10.0.0.10
Address: 10.0.0.10#53

Name: dc01.HOME.ROB-CAMPBELL.LAN
Address: 10.0.0.10
Name: dc01.HOME.ROB-CAMPBELL.LAN
Address: 2600:4040:4666:f900::1bac

[Sat Sep 10 15:00:25] [root at dc02~$] nslookup dc01.home.rob-campbell.lan
Server: 10.0.0.10
Address: 10.0.0.10#53

Name: dc01.home.rob-campbell.lan
Address: 10.0.0.10
Name: dc01.home.rob-campbell.lan
Address: 2600:4040:4666:f900::1bac

[Sat Sep 10 15:00:35] [root at dc02~$] host dc02
dc02.HOME.ROB-CAMPBELL.LAN has address 10.0.0.9
[Sat Sep 10 15:01:46] [root at dc02~$] host dc02.rob-campbell.lan
[Sat Sep 10 15:01:53] [root at dc02~$] host 10.0.0.9
Host 9.0.0.10.in-addr.arpa. not found: 3(NXDOMAIN)
[Sat Sep 10 15:02:00] [root at dc02~$] nslookup dc02
Server: 10.0.0.10
Address: 10.0.0.10#53

Name: dc02.HOME.ROB-CAMPBELL.LAN
Address: 10.0.0.9

[Sat Sep 10 15:02:08] [root at dc02~$] nslookup dc02.home.rob-campbell.lan
Server: 10.0.0.10
Address: 10.0.0.10#53

Name: dc02.home.rob-campbell.lan
Address: 10.0.0.9

I'm using samba as my DNS... Or at least I thought I was. LOL.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In all things, Be Intentional.

On Sat, Sep 10, 2022 at 2:37 PM Thomas Cameron via samba <
samba at lists.samba.org> wrote:

> On 9/9/22 18:20, Rob Campbell via samba wrote:
> > nslookup 10.0.0.10
> > 10.0.0.10.in-addr.arpa name = DC01.
>
> This is wrong, as I understand it. You want reverse ip addresses to come
> back with the FQDN, I think.
>
> Here's how my network responds with ip address lookups:
>
> [thomas.cameron at case Desktop]$ host case
> case.tc.camerontech.com has address 172.31.100.4
> [thomas.cameron at case Desktop]$ host case.tc.camerontech.com
> case.tc.camerontech.com has address 172.31.100.4
> [thomas.cameron at case Desktop]$ host 172.31.100.4
> 4.100.31.172.in-addr.arpa domain name pointer case.tc.camerontech.com.
> [thomas.cameron at case Desktop]$ nslookup case
> Server:         127.0.0.53
> Address:        127.0.0.53#53
>
> Non-authoritative answer:
> Name:   case.tc.camerontech.com
> Address: 172.31.100.4
>
> [thomas.cameron at case Desktop]$ nslookup case.tc.camerontech.com
> Server:         127.0.0.53
> Address:        127.0.0.53#53
>
> Non-authoritative answer:
> Name:   case.tc.camerontech.com
> Address: 172.31.100.4
>
> [thomas.cameron at case Desktop]$ nslookup 172.31.100.4
> 4.100.31.172.in-addr.arpa       name = case.tc.camerontech.com.
>
> Authoritative answers can be found from:
>
> [thomas.cameron at case Desktop]$
>
> I won't swear to it, but I am *pretty* sure that DNS is supposed to
> return the FQDN.
>
> For reference, I run my own BIND server. I don't rely on Samba to do
> DNS, I have a separate DNS server in my environment. My zone files look
> like this (this is two lines, in case it gets trimmed):
>
> [root at wintermute ~]# grep case /var/named/*
> /var/named/100.31.172.in-addr.arpa:4    PTR     case.tc.camerontech.com.
> /var/named/tc.camerontech.com:case      IN      1H      A
>  172.31.100.4
>
> Hope this helps!
> Thomas
>
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