[Samba] DDNS with bind9 and isc-dhcp-server

[Stefan Kania]

Good Morning,

Am 15.08.2018 um 22:26 schrieb Rowland Penny via samba:
> It looks like the update script is not running or failing somewhere.
> 
> What OS ?
It's a Debian 9 with Samba 4.8.3 from Louis. Bind9 is from the debian
repositories so its a 9.10.
If I join a Client (without DHCP and a fix IP-addresse) the DNS-Server
is updated so I can resolve the Client-IP.

If I do a:
-------------------
root at sambabuch:~# /etc/dhcp/bin/dhcp-dyndns.sh add 192.168.56.221
1:8:0:27:7b:f1:f2 linux-client
-------------------
I got a very long out put from DNS:
-------------------
...
Sending update to 127.0.0.1#53
Outgoing update query:
;; ->>HEADER<<- opcode: UPDATE, status: NOERROR, id:  35944
;; flags:; ZONE: 1, PREREQ: 0, UPDATE: 2, ADDITIONAL: 1
;; UPDATE SECTION:
linux-client.example.net. 0     ANY     A
linux-client.example.net. 3600  IN      A       192.168.56.221
...
Sending update to 127.0.0.1#53
Outgoing update query:
;; ->>HEADER<<- opcode: UPDATE, status: NOERROR, id:  31600
;; flags:; ZONE: 1, PREREQ: 0, UPDATE: 2, ADDITIONAL: 1
;; UPDATE SECTION:
221.56.168.192.in-addr.arpa. 0  ANY     PTR
221.56.168.192.in-addr.arpa. 3600 IN    PTR     linux-client.example.net.
...
;; TSIG PSEUDOSECTION:
1525823762.sig-sambabuch.example.net. 0 ANY TSIG gss-tsig. 1534402054
300 28 BAQF//////8AAAAAIVrv+6o2Iki9h5Nlvd13Ag== 31600 NOERROR 0
-------------------
This looks good for me. But:
-------------------
root at sambabuch:~# host linux-client
Host linux-client not found: 3(NXDOMAIN)
root at sambabuch:~# host linux-client.example.net
Host linux-client.example.net not found: 3(NXDOMAIN)
-------------------

> What is in the named conf files ?
Here the content of the named.conf.options
------------------
options {
        directory "/var/cache/bind";

        // If there is a firewall between you and nameservers you want
        // to talk to, you may need to fix the firewall to allow multiple
        // ports to talk.  See http://www.kb.cert.org/vuls/id/800113

        // If your ISP provided one or more IP addresses for stable
        // nameservers, you probably want to use them as forwarders.
        // Uncomment the following block, and insert the addresses
replacing
        // the all-0's placeholder.

        forwarders {
                1.1.1.1;
        };
        tkey-gssapi-keytab "/var/lib/samba/private/dns.keytab";

//========================================================================
        // If BIND logs error messages about the root key being expired,
        // you will need to update your keys.  See
https://www.isc.org/bind-keys

//========================================================================
        dnssec-validation no;

        auth-nxdomain no;    # conform to RFC1035
        listen-on-v6 { any; };
        allow-recursion { any; };
        allow-query { any; };
        allow-query-cache { any; };
};
------------------
And named.conf.local
------------------
//
// Do any local configuration here
//

// Consider adding the 1918 zones here, if they are not used in your
// organization
//include "/etc/bind/zones.rfc1918";
include "/var/lib/samba/bind-dns/named.conf";

------------------
It must work, I had it working before, but now I can't find the problem :-(

Stefan


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