[Samba] Samba43 Kerberos problems

Tue Jun 21 14:27:38 UTC 2016

Hi,

Try to add "rdns = false" in krb5.conf on SERVER1.

2016-06-21 13:36 GMT+02:00 Juan Garcia <juan at ish.com.au>:

> Hi There,
>
> I have an odd issue with my samba4 infrastructure, I have two servers both
> replicating fine.
> DC1 passes all tests documented here:
> https://wiki.samba.org/index.php/Setup_a_Samba_Active_Directory_Domain_Controller
> Except the following test:
>
> # kinit administrator
> # kinit: krb5_get_init_creds: Client (administrator at DOMAIN.NAME.COM.AU)
> unknown
>
> And in the logs I have found the following:
>
> # kinit for SERVER1$@DOMAIN.NAME.COM.AU failed (Client not found in
> Kerberos database) SERVER1 is my DC1, not sure why it has a $ right before
> the @ is this normal?
> I get the same error when running
>
> # samba_dnsupdate --verbose --all-names
> IPs: ['0.0.0.0'] -> shows the real DC1 ip address
> Traceback (most recent call last):
>   File "/usr/local/sbin/samba_dnsupdate", line 621, in <module>
>     get_credentials(lp)
>   File "/usr/local/sbin/samba_dnsupdate", line 125, in get_credentials
>     raise e
> RuntimeError: kinit for SERVER1$@DOMAIN.NAME.COM.AU failed (Client not
> found in Kerberos database)
>
> Not sure if this is useful but I have run:
>
> # samba_dnsupdate --verbose --all-names --no-credentials
>
> Calling nsupdate for A server1.domain.name.com.au 0.0.0.0 (add) -> Both
> lines don't show 0.0.0.0 it shows the real ip address
> Failed nsupdate: A server1.domain.name.com.au 0.0.0.0 : [Errno 2] No such
> file or directory
>
> And it keeps trying to find those files all with the same error:
> [Errno 2] No such file or directory
>
> Calling nsupdate for A gc._msdcs.a
> Calling nsupdate for SRV _gc._tcp.
>
> Last thing that I found
> On DC1
> # ps ax | grep samba
> 38636  -  Is      0:00.40 /usr/local/sbin/samba --daemon
> --configfile=/usr/local/etc/smb4.conf
> 38637  -  I       0:00.00 samba: task[s3fs_parent] (samba)
> 38638  -  S       0:27.24 samba: task[dcesrv] (samba)
> 38640  -  I       0:00.01 samba: task wrepl server_id[38640] (samba)
> 38641  -  I       0:08.63 samba: task[ldapsrv] (samba)
> 38642  -  S       0:00.07 samba: task[cldapd] (samba)
> 38644  -  S       1:04.27 samba: task[dreplsrv] (samba)
> 38645  -  I       0:00.00 samba: task[winbindd_parent] (samba)
> 38646  -  I       0:00.01 samba: task[ntp_signd] (samba)
> 38648  -  I       0:03.79 samba: task[kccsrv] (samba)
> 38649  -  S       0:00.89 samba: task[dnsupdate] (samba)
> 38650  -  I       0:04.54 samba: task[dns] (samba)
>
> on DC2
> # ps ax | grep samba
> 11108  -  Ss       0:00.41 /usr/local/sbin/samba --daemon
> --configfile=/usr/local/etc/smb4.conf
> 11109  -  I        0:00.00 samba: task[s3fs_parent] (samba)
> 11110  -  S        0:02.74 samba: task[dcesrv] (samba)
> 11112  -  S        0:00.00 samba: task wrepl server_id[11112] (samba)
> 11113  -  I        0:01.77 samba: task[ldapsrv] (samba)
> 11114  -  S        0:00.19 samba: task[cldapd] (samba)
> 11115  -  I        0:00.44 samba: task[kdc] (samba)
> 11116  -  S        0:01.07 samba: task[dreplsrv] (samba)
> 11117  -  I        0:00.00 samba: task[winbindd_parent] (samba)
> 11118  -  S        0:00.00 samba: task[ntp_signd] (samba)
> 11120  -  I        0:00.43 samba: task[kccsrv] (samba)
> 11121  -  S        0:00.04 samba: task[dnsupdate] (samba)
> 11122  -  S        0:00.01 samba: task[dns] (samba)
>
> As you can see task[kdc] (samba) is not running on DC1, I'm pretty sure
> this is something to do with my issues, but not sure how to fix this.
>
> This is my /etc/resolv.conf
>
> domain domain.name.com.au
> nameserver 192.168.1.1 -> ip address of firewall which handles DNS
>
> This is my /etc/krb5.conf
>
> [libdefaults]
>         default_realm = DOMAIN.NAME.COM.AU
>         dns_lookup_realm = false
>         dns_lookup_kdc = true
>
> This is my /usr/local/etc/smb4.conf
>
> Global parameters
> [global]
>         interfaces = 192.168.1.100
>         bind interfaces only = yes
>         workgroup = CW1
>         realm = AD.CARRIAGEWORKS.COM.AU
>         netbios name = SERVER1
>         server role = active directory domain controller
>         dns forwarder = 192.168.1.1
>         printing = bsd
>         server services = s3fs, rpc, wrepl, ldap, cldap, kdc, drepl,
> winbind, ntp_signd, kcc, dnsupdate, dns
>         dcerpc endpoint servers = epmapper, wkssvc, rpcecho, samr,
> netlogon, lsarpc, spoolss, drsuapi, dssetup, unixinfo, browser, eventlog6,
> backupkey, dnsserver
>         restrict anonymous = 1
>         map acl inherit = no
>         store dos attributes = yes
>         unix extensions = no
>         ea support = no
>         idmap_ldb:use rfc2307 = yes
>         browseable= yes
>         writable = yes
>         read only= no
>         create mask = 770
>         force create mode = 770
>         directory mask = 770
>         force directory mode = 770
>         kerberos method = system keytab
>         client ldap sasl wrapping = sign
>         allow dns updates = nonsecure and secure
>
> I appreciate your help and thanks in advance for reading this.
>
> Regards,
>
> --
> Juan Garcia
> ish
> http://www.ish.com.au
> Level 1, 30 Wilson Street Newtown 2042 Australia
> phone +61 2 9550 5001   fax +61 2 9550 4001
>
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