[Samba] Strange DNS issue...
Ryan Ashley
ryana at reachtechfp.com
Fri Sep 12 09:02:45 MDT 2014
Sorry for the delayed response. We were off yesterday.
Rowland, this same setup works with reverse-zones on a 2008 R2 domain. I
mean, on a 2008 R2 domain hosted by 2008 R2. We have nothing special on
the Samba 4 domain I am aware of. The client configurations on both
domains are set to DHCP for all workstations. In other words, if I take
a freshly installed Windows 7 box and join it to Samba 4 domains, I get
no reverse-DNS. If I join the same box to the Windows-hosted domain, I
do. Not saying this is not a Windows issue as it may well be but I was
making note of that test, which I did attempt prior to posting here.
Here is a dump from syslog with dhcpd filtered.
Actually, that has a lot of MAC addresses in it. Suffice to say I see
DHCPREQUEST, DHCPACK, DHCPINFORM, DHCPACK, DHCPINFORM, and DHCPACK again
for loads of MACs/addresses. No errors. If you still want to see it, may
I send it to you off-list to protect the MACs?
Here is the dump from my dhcpd.leases file.
lease 172.16.2.12 {
starts 5 2014/09/12 14:44:22;
ends 5 2014/09/12 14:54:22;
cltt 5 2014/09/12 14:44:22;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\001\340i\225\303\260\332";
client-hostname "youthpastor01";
}
lease 172.16.2.9 {
starts 5 2014/09/12 14:47:26;
ends 5 2014/09/12 14:57:26;
cltt 5 2014/09/12 14:47:26;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\0018`w\033:\200";
client-hostname "jcenter";
}
lease 172.16.2.13 {
starts 5 2014/09/12 14:47:54;
ends 5 2014/09/12 14:57:54;
cltt 5 2014/09/12 14:47:54;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\0018`w\265w<";
client-hostname "av01";
}
lease 172.16.2.47 {
starts 5 2014/09/12 14:48:53;
ends 5 2014/09/12 14:58:53;
cltt 5 2014/09/12 14:48:53;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\001\004}{\027\362\237";
client-hostname "budget";
}
lease 172.16.2.11 {
starts 5 2014/09/12 14:48:54;
ends 5 2014/09/12 14:58:54;
cltt 5 2014/09/12 14:48:54;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\0018`w\033\206\367";
client-hostname "admin01";
}
lease 172.16.2.12 {
starts 5 2014/09/12 14:49:22;
ends 5 2014/09/12 14:59:22;
cltt 5 2014/09/12 14:49:22;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\001\340i\225\303\260\332";
client-hostname "youthpastor01";
}
lease 172.16.2.9 {
starts 5 2014/09/12 14:52:26;
ends 5 2014/09/12 15:02:26;
cltt 5 2014/09/12 14:52:26;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\0018`w\033:\200";
client-hostname "jcenter";
}
lease 172.16.2.13 {
starts 5 2014/09/12 14:52:54;
ends 5 2014/09/12 15:02:54;
cltt 5 2014/09/12 14:52:54;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet ;
uid "\0018`w\265w<";
client-hostname "av01";
}
I edited the MACs out here, and there were more, but I lost some of my
scrollback buffer.
On 09/11/2014 09:02 AM, L.P.H. van Belle wrote:
> and as tip why you revers is not working.
>
> check the info in /var/lib/dhcpd/
> and look what you clients where getting..
> this is how i solved my rev problem ;-)
>
>
>> -----Oorspronkelijk bericht-----
>> Van: ryana at reachtechfp.com
>> [mailto:samba-bounces at lists.samba.org] Namens Ryan Ashley
>> Verzonden: donderdag 11 september 2014 1:14
>> Aan: samba at lists.samba.org
>> Onderwerp: Re: [Samba] Strange DNS issue...
>>
>> Anybody? This is very strange and I cannot figure out why it is
>> happening or why my reverse-DNS zones are not populating.
>>
>> On 09/09/2014 06:51 PM, Ryan Ashley wrote:
>>> Alright, things have been fine since the sharing issue, but
>> I finally
>>> decided to dig into why my reverse-DNS zones are empty, save one
>>> single entry at the client location. What I found was very strange
>>> indeed. I have some type of grayed out records I cannot delete that
>>> are named after the hostnames of devices on my network. This one has
>>> me. Here's a screenshot linked below, and my BIND/DHCP
>> configurations.
>>> http://dhta.oesm.org/dns.jpeg
>>>
>>> root at dc01:~# cat /etc/bind/named.conf
>>> # Required for SAMBA4
>>> include "/var/lib/samba/private/named.conf";
>>>
>>> # Global options
>>> options {
>>> auth-nxdomain yes;
>>> directory "/var/cache/bind";
>>>
>>> forwarders {
>>> 8.8.8.8;
>>> 8.8.4.4;
>>> };
>>>
>>> allow-transfer { none; };
>>> notify no;
>>> empty-zones-enable no;
>>>
>>> allow-query {
>>> 127.0.0.1;
>>> 172.16.0.0/22;
>>> };
>>>
>>> allow-recursion {
>>> 127.0.0.1;
>>> 172.16.0.0/22;
>>> };
>>>
>>> tkey-gssapi-keytab "/var/lib/samba/private/dns.keytab";
>>> };
>>>
>>> # Root servers (required zone for recursive queries)
>>> zone "." {
>>> type hint;
>>> file "named.root";
>>> };
>>>
>>> # Required localhost forward/reverse zones
>>> zone "localhost" {
>>> type master;
>>> file "master/localhost.zone";
>>> };
>>>
>>> zone "0.0.127.in-addr.arpa" {
>>> type master;
>>> file "master/0.0.127.zone";
>>> };
>>>
>>> root at dc01:~# cat /etc/dhcp/dhcpd.conf
>>> ddns-update-style none;
>>> option domain-name "truevine.lan";
>>> option domain-name-servers 172.16.0.1,172.16.0.2;
>>> default-lease-time 600;
>>> max-lease-time 7200;
>>> authoritative;
>>> log-facility local7;
>>>
>>> subnet 172.16.0.0 netmask 255.255.252.0 {
>>> range 172.16.2.1 172.16.2.100;
>>> option routers 172.16.0.254;
>>> option broadcast-address 172.16.3.255;
>>> ddns-updates on;
>>> ddns-update-style interim;
>>> update-static-leases on;
>>> }
>>>
>>> That's it. Have I done something that would cause such an
>> odd thing to
>>> happen? Also, how do I remove those things?
>> --
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>>
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