[Samba] Samba4 internal DNS not responding to DNS requests

[Andrew Bartlett]

On Wed, 2013-01-09 at 09:47 -0500, felix at epepm.cupet.cu wrote:
> > I am not able to get the Samba4 internal DNS server to respond to DNS
> > requests on the network.
> >
> > I am running Samba4 4.1.0pre1-GIT-c1fb37d on my CentOS 6.3 system.  I
> > followed the instructions here:
> > https://wiki.samba.org/index.php/Samba_AD_DC_HOWTO
> >
> > I configured Samba4 to use the internal DNS server.  My Samba4 server is
> > 192.168.0.13. Its full hostname is ubuntu-ad.allenlan.net.  The realm is
> > ALLENLAN.NET.
> >
> > The DNS testing section of the document passes:
> >
> > $host -t SRV _ldap._tcp.allenlan.net.
> >     _ldap._tcp.allenlan.net has SRV record 0 100 389
> > ubuntu-ad.allenlan.net.
> > $host -t SRV _kerberos._udp.allenlan.net.
> >     _kerberos._udp.allenlan.net has SRV record 0 100 88
> > ubuntu-ad.allenlan.net.
> > $host -t A ubuntu-ad.allenlan.net.
> >     ubuntu-ad.allenlan.net has address 192.168.0.13
> >
> > I configured my Windows XP system with a DNS of 192.168.0.13 (Samba4
> > server).
> > When I perform the Windows command "nslookup ubuntu-ad.allenlan.net" (or
> > any variation of that) it reports:
> >     DNS request timed out.
> >         timeout was 2 seconds.
> >     *** Can't find server name for address 192.168.0.13: Timed out
> >     (above 3 messages repeat again)
> >     Default servers are not available
> >     Server: UnKnown
> >     Address: 192.168.0.13
> >
> > The Windows system can ping the Samba4 server by IP address.
> >
> > Any help would be appreciated!  More configuration information below.
> >
> > /etc/resolv.conf:
> > domain allenlan.net
> > nameserver 192.168.0.13
> >
> > /usr/local/samba/etc/smb.conf:
> > [global]
> >         workgroup = ALLENLAN
> >         realm = ALLENLAN.NET
> >         netbios name = UBUNTU-AD
> >         server role = active directory domain controller
> >         dns forwarder = 192.168.0.1
> >         interfaces = 192.168.0.13 127.0.0.1
> >         bind interfaces only = yes
> >         log level = 3
> >         server services = smb, rpc, nbt, wrepl, ldap, cldap, kdc, drepl,
> > winbind, ntp_signd, kcc, dnsupdate, dns
> >
> > /etc/hosts:
> > 192.168.0.13    ubuntu-ad       ubuntu-ad.allenlan.net
> > 127.0.0.1   localhost localhost.localdomain localhost4
> > localhost4.localdomain4
> > ::1         localhost localhost.localdomain localhost6
> > localhost6.localdomain6
> >
> > $hostname
> > ubuntu-ad.allenlan.net
> >
> 
> That was the reason I switched to bind9. The internal dns server used to
> keep connections open, without closing old ones, until reaching the limit
> of max files...
> I don't know wether it's been already fixed or not. But it doesn't happen
> with bind.
> This topic is been in the list before.

Yes, we fixed that (with a timeout).

Andrew Bartlett

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org