Author Topic: DNS Records not showing with W2008 Active Directory as PDC  (Read 580 times)

andcar

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DNS Records not showing with W2008 Active Directory as PDC
« on: January 23, 2020, 10:11:20 am »
Dear all,
I need some help in understanding what is going on. I have a windows 2008 server (not R2) that I want to replace with zentyal 6.1.2. I successfully joined the domain. I can see and manage Users, Groups..I correctly see the computers..I'm having problems(?) with the DNS. In zentyal I cannot see the entries, the A records that are present in the DomainDnsZones that are correctly transferred. It's this the normal behaviour?
Moreover, if I add an A entry in Zentyal DNS I can see it in the DNS manager of W2K8 but the opposite does not happens.
Can somebody help me?
« Last Edit: February 03, 2020, 12:37:16 pm by andcar »

doncamilo

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Re: DNS Records not showing whith W2008 Active Directory as PDC
« Reply #1 on: January 23, 2020, 12:13:40 pm »
 :)

Could be you would find this useful: https://wiki.samba.org/index.php/Samba-tool_ldapcmp

Cheers!
"That place... is strong with the
dark side of the Force.  A domain
of evil it is.  In you must go."

Yoda.

andcar

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Re: DNS Records not showing whith W2008 Active Directory as PDC
« Reply #2 on: January 23, 2020, 04:41:25 pm »
Hi, thanks for the tip.
I've made a check..all the results are oK...SUCCESS for the
" samba-tool ldapcmp ldap://DC1 ldap://DC2 -Uadministrator" command.
In addition I've tried to connect via the Windows DNS Manager to the zentyal server and there it is shiowing the expected same entries I can see in the W2K8 Server DNS ..thorugh the same DNS manager Tool...
It seems like Zentyal is not showing the LDAP entries already present and don't added by the Zentyal DNS web interface.
Any other idea?
Andrea
« Last Edit: January 23, 2020, 05:06:53 pm by andcar »

doncamilo

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Re: DNS Records not showing whith W2008 Active Directory as PDC
« Reply #3 on: January 23, 2020, 05:39:00 pm »
 :)

Could you include some screenshots? (You'll have to use some external service as imgBB).

Regarding your problem, there are tons of LDAP records, objects, and attributes of the Active Directory schemas that aren't shown in the Zentyal "Users and Computers" module. Furthermore, Samba uses Bind9 but the corresponding menu in webadmin (DNS) could be isn't either exhaustive when showing data.

You can use the "samba-tool dns" tool for querying the samba dns subsystem, create zones, records, etc. This way you'll be able to check your samba dns subsystem.

If this check is correct, and you haven't replication errors (read this https://wiki.samba.org/index.php/Verifying_the_Directory_Replication_Statuses) the most probably is that your system is working properly.

You could find this document useful:

https://wiki.samba.org/index.php/BIND9_DLZ_DNS_Back_End#Introduction

Cheers!
"That place... is strong with the
dark side of the Force.  A domain
of evil it is.  In you must go."

Yoda.

andcar

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Re: DNS Records not showing whith W2008 Active Directory as PDC
« Reply #4 on: January 31, 2020, 06:06:53 pm »
Thanks for the quick reply and sorry for my slow answer... :)
I've checked everything and the replica are ok. Both the controllers share the same DB Informations: users,groups, computer, dns..
Here I'm posting the Screenshots as requested:
1) ZENTYAL WEB DNS PAGE - hosts entries  https://ibb.co/fr5FrBp
2) W2K8 DNS MANAGER INTERFACE CONNECTED TO THE W2K8 DC https://ibb.co/XWGjb7F
3) W2K8 DNS MANAGER INTERFACE CONNECTED TO THE ZENTYAL DC https://ibb.co/RTg1NZc

I've put some comments on the images to show you the situation.
Thanks
Andrea

doncamilo

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Re: DNS Records not showing with W2008 Active Directory as PDC
« Reply #5 on: February 03, 2020, 03:31:13 pm »
 :)

There's some useful commands to manage the DNS Samba backend:

Code: [Select]
root@zenlvm:~# samba-tool dns serverinfo localhost -U admindc%admindc
...

  dwVersion                   : 0xece0205
  fBootMethod                 : DNS_BOOT_METHOD_DIRECTORY
  fAdminConfigured            : FALSE
  fAllowUpdate                : TRUE
  fDsAvailable                : TRUE
  pszServerName               : ZENLVM.eregion.lan
  pszDsContainer              : CN=MicrosoftDNS,DC=DomainDnsZones,DC=eregion,DC=lan
  aipServerAddrs              : ['127.0.0.1', '127.0.1.1', '10.5.20.98', '192.168.0.1']
  aipListenAddrs              : ['127.0.0.1', '127.0.1.1', '10.5.20.98', '192.168.0.1']
  aipForwarders               : []
  dwLogLevel                  : 0
  dwDebugLevel                : 0
  dwForwardTimeout            : 3
  dwRpcPrototol               : 0x5
  dwNameCheckFlag             : DNS_ALLOW_MULTIBYTE_NAMES
  cAddressAnswerLimit         : 0
  dwRecursionRetry            : 3
  dwRecursionTimeout          : 8
  dwMaxCacheTtl               : 86400
  dwDsPollingInterval         : 180
  dwScavengingInterval        : 0
  dwDefaultRefreshInterval    : 168
  dwDefaultNoRefreshInterval  : 168
  fAutoReverseZones           : FALSE
  fAutoCacheUpdate            : FALSE
  fRecurseAfterForwarding     : FALSE
  fForwardDelegations         : TRUE
  fNoRecursion                : FALSE
  fSecureResponses            : FALSE
  fRoundRobin                 : TRUE
  fLocalNetPriority           : FALSE
  fBindSecondaries            : FALSE
  fWriteAuthorityNs           : FALSE
  fStrictFileParsing          : FALSE
  fLooseWildcarding           : FALSE
  fDefaultAgingState          : FALSE
  dwRpcStructureVersion       : 0x2
  aipLogFilter                : []
  pwszLogFilePath             : None
  pszDomainName               : eregion.lan
  pszForestName               : eregion.lan
  pszDomainDirectoryPartition : DC=DomainDnsZones,DC=eregion,DC=lan
  pszForestDirectoryPartition : DC=ForestDnsZones,DC=eregion,DC=lan
  dwLocalNetPriorityNetMask   : 0xff
  dwLastScavengeTime          : 0
  dwEventLogLevel             : 4
  dwLogFileMaxSize            : 0
  dwDsForestVersion           : 2
  dwDsDomainVersion           : 2
  dwDsDsaVersion              : 4
  fReadOnlyDC                 : FALSE

Code: [Select]
root@zenlvm:~# samba-tool dns zonelist localhost -U admindc%admindc
...
  2 zone(s) found

  pszZoneName                 : eregion.lan
  Flags                       : DNS_RPC_ZONE_DSINTEGRATED DNS_RPC_ZONE_UPDATE_SECURE
  ZoneType                    : DNS_ZONE_TYPE_PRIMARY
  Version                     : 50
  dwDpFlags                   : DNS_DP_AUTOCREATED DNS_DP_DOMAIN_DEFAULT DNS_DP_ENLISTED
  pszDpFqdn                   : DomainDnsZones.eregion.lan

  pszZoneName                 : _msdcs.eregion.lan
  Flags                       : DNS_RPC_ZONE_DSINTEGRATED DNS_RPC_ZONE_UPDATE_SECURE
  ZoneType                    : DNS_ZONE_TYPE_PRIMARY
  Version                     : 50
  dwDpFlags                   : DNS_DP_AUTOCREATED DNS_DP_FOREST_DEFAULT DNS_DP_ENLISTED
  pszDpFqdn                   : ForestDnsZones.eregion.lan


Code: [Select]
root@zenlvm:~# samba-tool dns zoneinfo localhost eregion.lan -U admindc%admindc
...
  pszZoneName                 : eregion.lan
  dwZoneType                  : DNS_ZONE_TYPE_PRIMARY
  fReverse                    : FALSE
  fAllowUpdate                : DNS_ZONE_UPDATE_SECURE
  fPaused                     : FALSE
  fShutdown                   : FALSE
  fAutoCreated                : FALSE
  fUseDatabase                : TRUE
  pszDataFile                 : None
  aipMasters                  : []
  fSecureSecondaries          : DNS_ZONE_SECSECURE_NO_XFER
  fNotifyLevel                : DNS_ZONE_NOTIFY_LIST_ONLY
  aipSecondaries              : []
  aipNotify                   : []
  fUseWins                    : FALSE
  fUseNbstat                  : FALSE
  fAging                      : FALSE
  dwNoRefreshInterval         : 168
  dwRefreshInterval           : 168
  dwAvailForScavengeTime      : 0
  aipScavengeServers          : []
  dwRpcStructureVersion       : 0x2
  dwForwarderTimeout          : 0
  fForwarderSlave             : 0
  aipLocalMasters             : []
  dwDpFlags                   : DNS_DP_AUTOCREATED DNS_DP_DOMAIN_DEFAULT DNS_DP_ENLISTED
  pszDpFqdn                   : DomainDnsZones.eregion.lan
  pwszZoneDn                  : DC=eregion.lan,CN=MicrosoftDNS,DC=DomainDnsZones,DC=eregion,DC=lan
  dwLastSuccessfulSoaCheck    : 0
  dwLastSuccessfulXfr         : 0
  fQueuedForBackgroundLoad    : FALSE
  fBackgroundLoadInProgress   : FALSE
  fReadOnlyZone               : FALSE
  dwLastXfrAttempt            : 0
  dwLastXfrResult             : 0

Code: [Select]
root@zenlvm:~# samba-tool dns query localhost EREGION.LAN @ ALL -U admindc%admindc
...
  Name=, Records=4, Children=0
    SOA: serial=6, refresh=900, retry=600, expire=86400, minttl=3600, ns=zenlvm.eregion.lan., email=hostmaster.eregion.lan. (flags=600000f0, serial=6, ttl=3600)
    NS: zenlvm.eregion.lan. (flags=600000f0, serial=6, ttl=900)
    A: 10.5.20.98 (flags=600000f0, serial=6, ttl=259200)
    A: 192.168.0.1 (flags=600000f0, serial=6, ttl=259200)
  Name=_kerberos, Records=1, Children=0
    TXT: "eregion.lan" (flags=f0, serial=5, ttl=259200)
  Name=_msdcs, Records=0, Children=0
  Name=_sites, Records=0, Children=1
  Name=_tcp, Records=0, Children=5
  Name=_udp, Records=0, Children=3
  Name=DomainDnsZones, Records=0, Children=2
  Name=ForestDnsZones, Records=0, Children=2
  Name=zenlvm, Records=2, Children=0
    A: 10.5.20.98 (flags=f0, serial=6, ttl=259200)
    A: 192.168.0.1 (flags=f0, serial=6, ttl=259200)

Take note that Samba4 uses BIND9 (usually) but BIND9 has his own existence as a service and have their own commands of managing.
In my DNS server there is some other zones that I defined and that aren't managed by samba4 but for BIND9 itself:


Code: [Select]
rndc dumpdb -all && cat /var/cache/bind/named_dump.db | less

I think that it contains the data you want see

Cheers!
"That place... is strong with the
dark side of the Force.  A domain
of evil it is.  In you must go."

Yoda.

andcar

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Re: DNS Records not showing with W2008 Active Directory as PDC
« Reply #6 on: February 03, 2020, 04:39:41 pm »
Thanks for the hints.
This command returns me all the entries.
Code: [Select]
samba-tool dns query localhost MYDOMAIN.LOCAL @ ALL -U admindc%admindcSo, in the end, are you saying that it is normal that I cannot see the same entries from the zentyal web interface-DNS?
If not, do I have the possibility to do something to make them appear in the web interface?
Let me know
Andrea

doncamilo

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Re: DNS Records not showing with W2008 Active Directory as PDC
« Reply #7 on: February 04, 2020, 01:22:03 pm »
...
So, in the end, are you saying that it is normal that I cannot see the same entries from the zentyal web interface-DNS?
If not, do I have the possibility to do something to make them appear in the web interface?
Let me know
Andrea

The Zentyal webadmin is designed to make easy the most usual activities of a sysadmin. So, there is LDAP objects, internal users accounts, etc that are builtin objects and are used and managed directly by samba. Most of them aren't shown by webadmin. However, you can do the advanced tasks concerning these objects through the command-line tools provided by samba, BIND9, dovecot, SOGo, etc...

Webadmin follows a design principle that looks for making easy the usual tasks without exposing the system to potentially dangerous operations. This makes Zentyal usable for inexpert or non-profesional sysadmins.

I don't know if this answers your question. If the problem is to check that your domain is perfectly operative with your zentyal server alone, you could do some checks by "unplugging" temporarily the rest of the domain controllers (Don't remove them from the domain!)

Cheers!
"That place... is strong with the
dark side of the Force.  A domain
of evil it is.  In you must go."

Yoda.

andcar

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Re: DNS Records not showing with W2008 Active Directory as PDC
« Reply #8 on: February 05, 2020, 04:51:20 pm »
Absolutely yes.
Now everything is clear.
Thanks again
Andrea