[Samba] DNS replication issue

Ilias Chasapakis forumZFD chasapakis at forumZFD.de
Wed Dec 18 14:07:00 UTC 2019


Hi Rowland,

Thank you for replying. Please find the output here below. Just a
possible tip:

_kerberos._tcp.example.com    service = 0 100 88 addc-new.example.com.

output is present on the new machine but if we issue a host -t SRV
_kerberos._tcp.example.com on addc2 it does not appear in the list.

Kind regards.

Collected config  --- 2019-12-18-20:30 -----------

Hostname: addc-new
DNS Domain: example.com
FQDN: addc-new.example.com
ipaddress: 192.168.20.22 10.0.103.13

-----------

Kerberos SRV _kerberos._tcp.example.com record verified ok, sample output:
Server:        192.168.20.22
Address:    192.168.20.22#53

_kerberos._tcp.example.com    service = 0 100 88 addc-sub1.example.com.
_kerberos._tcp.example.com    service = 0 100 88 addc2.example.com.
_kerberos._tcp.example.com    service = 0 100 88 addc3.example.com.
_kerberos._tcp.example.com    service = 0 100 88 addc-sub2.example.com.
_kerberos._tcp.example.com    service = 0 100 88 addc-sub3.example.com.
_kerberos._tcp.example.com    service = 0 100 88 addc-new.example.com.
Samba is running as an AD DC

-----------
       Checking file: /etc/os-release

PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

-----------


This computer is running Debian 10.2 x86_64

-----------
running command : ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP group default qlen 1000
    link/ether 52:54:00:86:8a:ba brd ff:ff:ff:ff:ff:ff
    inet 192.168.20.22/24 brd 192.168.20.255 scope global ens3
    inet6 fe80::5054:ff:fe86:8aba/64 scope link
3: ens10: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP group default qlen 1000
    link/ether 52:54:00:43:10:d2 brd ff:ff:ff:ff:ff:ff
    inet 10.0.103.13/24 brd 10.0.103.255 scope global ens10
    inet6 fe80::5054:ff:fe43:10d2/64 scope link

-----------
       Checking file: /etc/hosts

127.0.0.1    localhost
192.168.20.22    addc-new.example.com    addc-new
#list of heartbeat network hosts
#
10.0.103.11 ctdb1.heartbeat.example    ctdb1
10.0.103.21 ctdb2.heartbeat.example    ctdb2
10.0.103.13 ad1.heartbeat.example ad1
10.0.103.42 jumpi.heartbeat.example jumpi
10.0.103.12 gluster1.heartbeat.example gluster1
10.0.103.22 gluster2.heartbeat.example gluster2
10.0.103.23 ad2.heartbeat.example ad2

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

-----------

       Checking file: /etc/resolv.conf

domain example.com
search example.com
nameserver 192.168.20.22

-----------

       Checking file: /etc/krb5.conf

[libdefaults]
    default_realm = example.com
    dns_lookup_realm = false
    dns_lookup_kdc = true

-----------

       Checking file: /etc/nsswitch.conf

# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         compat winbind
group:          compat winbind
shadow:         compat
gshadow:        files

hosts:          files dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

-----------

       Checking file: /etc/samba/smb.conf

# Global parameters
[global]
    netbios name = ADDC-new
    realm = example.com
    server role = active directory domain controller
    server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl,
winbindd, ntp_signd, kcc, dnsupdate
    workgroup = ZFD
    wins support = yes

[netlogon]
    path = /var/lib/samba/sysvol/example.com/scripts
    read only = yes

[sysvol]
    path = /var/lib/samba/sysvol
    read only = yes

-----------

Detected bind DLZ enabled..
       Checking file: /etc/bind/named.conf

// This is the primary configuration file for the BIND DNS server named.
//
// Please read /usr/share/doc/bind9/README.Debian.gz for information on the
// structure of BIND configuration files in Debian, *BEFORE* you customize
// this configuration file.
//
// If you are just adding zones, please do that in
/etc/bind/named.conf.local

include "/etc/bind/named.conf.options";
include "/etc/bind/named.conf.local";
include "/etc/bind/named.conf.default-zones";

-----------

       Checking file: /etc/bind/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 {
        192.168.20.1;
    };
    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;
    dnssec-enable no;
    dnssec-lookaside no;

    auth-nxdomain no;    # conform to RFC1035

    allow-recursion { any; };
    allow-query { any; };
    allow-query-cache { any; };


    listen-on-v6 { any; };
};

-----------

       Checking file: /etc/bind/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";

-----------

       Checking file: /etc/bind/named.conf.default-zones

// prime the server with knowledge of the root servers
zone "." {
    type hint;
    file "/usr/share/dns/root.hints";
};

// be authoritative for the localhost forward and reverse zones, and for
// broadcast zones as per RFC 1912

zone "localhost" {
    type master;
    file "/etc/bind/db.local";
};

zone "127.in-addr.arpa" {
    type master;
    file "/etc/bind/db.127";
};

zone "0.in-addr.arpa" {
    type master;
    file "/etc/bind/db.0";
};

zone "255.in-addr.arpa" {
    type master;
    file "/etc/bind/db.255";
};

-----------

Samba DNS zone list:   9 zone(s) found

  pszZoneName                 : 40.168.192.in-addr.arpa
  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.example.com

  pszZoneName                 : 168.168.192.in-addr.arpa
  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.example.com

  pszZoneName                 : 20.168.192.in-addr.arpa
  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.example.com

  pszZoneName                 : 50.168.192.in-addr.arpa
  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.example.com

  pszZoneName                 : 169.168.192.in-addr.arpa
  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.example.com

  pszZoneName                 : 167.168.192.in-addr.arpa
  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.example.com

  pszZoneName                 : example.com
  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.example.com

  pszZoneName                 : 10.168.192.in-addr.arpa
  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.example.com

  pszZoneName                 : _msdcs.example.com
  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.example.com

Samba DNS zone list Automated check :
zone : 40.168.192.in-addr.arpa ok, no Bind flat-files found
-----------
zone : 168.168.192.in-addr.arpa ok, no Bind flat-files found
-----------
zone : 20.168.192.in-addr.arpa ok, no Bind flat-files found
-----------
zone : 50.168.192.in-addr.arpa ok, no Bind flat-files found
-----------
zone : 169.168.192.in-addr.arpa ok, no Bind flat-files found
-----------
zone : 167.168.192.in-addr.arpa ok, no Bind flat-files found
-----------
zone : example.com ok, no Bind flat-files found
-----------
zone : 10.168.192.in-addr.arpa ok, no Bind flat-files found
-----------
zone : _msdcs.example.com ok, no Bind flat-files found
-----------

Installed packages:
ii  bind9                            1:9.11.5.P4+dfsg-5.1       
amd64        Internet Domain Name Server
ii  bind9-host                       1:9.11.5.P4+dfsg-5.1       
amd64        DNS lookup utility (deprecated)
ii  bind9utils                       1:9.11.5.P4+dfsg-5.1       
amd64        Utilities for BIND
ii  krb5-config                      2.6                        
all          Configuration files for Kerberos Version 5
ii  krb5-locales                     1.17-3                     
all          internationalization support for MIT Kerberos
ii  libacl1:amd64                    2.2.53-4                   
amd64        access control list - shared library
ii  libattr1:amd64                   1:2.4.48-4                 
amd64        extended attribute handling - shared library
ii  libbind9-161:amd64               1:9.11.5.P4+dfsg-5.1       
amd64        BIND9 Shared Library used by BIND
ii  libgssapi-krb5-2:amd64           1.17-3                     
amd64        MIT Kerberos runtime libraries - krb5 GSS-API Mechanism
ii  libkrb5-26-heimdal:amd64         7.5.0+dfsg-3               
amd64        Heimdal Kerberos - libraries
ii  libkrb5-3:amd64                  1.17-3                     
amd64        MIT Kerberos runtime libraries
ii  libkrb5support0:amd64            1.17-3                     
amd64        MIT Kerberos runtime libraries - Support library
ii  libwbclient0:amd64               99:4.10.11-10              
amd64        Glue package for sernet-samba-libs.
ii  sernet-samba                     99:4.10.11-10              
amd64        SMB/CIFS file, print, and login server for Unix
ii  sernet-samba-ad                  99:4.10.11-10              
amd64        Samba Active Directory Domain Controller
ii  sernet-samba-client              99:4.10.11-10              
amd64        a LanManager-like simple client for Unix
ii  sernet-samba-common              99:4.10.11-10              
all          Samba common files used by both the server and the client
ii  sernet-samba-keyring             1.8                        
all          GnuPG archive keys of the SerNet Samba archive
ii  sernet-samba-libs:amd64          99:4.10.11-10              
amd64        Samba common library files used by both the server and the
client
ii  sernet-samba-libsmbclient0:amd64 99:4.10.11-10              
amd64        Shared library that allows applications to talk to SMB servers
ii  sernet-samba-winbind             99:4.10.11-10              
amd64        Samba nameservice integration server

-----------


On 18.12.19 14:20, Rowland penny via samba wrote:
> On 18/12/2019 13:07, Ilias Chasapakis forumZFD via samba wrote:
>> Hello,
>>
>> We are setting up 2 AD machines:
>>
>> New machine with subnet 192.168.1.21: Version
>> 4.10.11-SerNet-Debian-10.buster Bind version 9.11.5
>>
>> Existing machine 1 with subnet 192.168.2.21 Version
>> 4.10.11-SerNet-Debian-10.stretch Bind version 9.10.3
>>
>> Existing machine 2 with subnet 192.168.3.21  Version
>> 4.10.11-SerNet-Debian-10.stretch Bind version 9.10.3
>>
>> All with BIND_DLZ backend, same /etc/bind/named.conf.options,
>> /etc/bind/named.conf.local
>>
>> This is an extract from /etc/bind/named.conf.options allowing querying:
>
> Yes, I know you were trying to be brief, but posting extracts of a
> file doesn't really help, can you go here:
>
> https://github.com/thctlo/samba4/blob/master/samba-collect-debug-info.sh
>
> Download the script and run it on your new DC, post the output into a
> reply to this post, do not attach it, this list strips attachments. Do
> not post it somewhere on the internet and then post the link, they
> have an habit of disappearing.
>
> Rowland
>
>
>
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