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Jeff Sadowski

2016-May-18 16:13 UTC

[Samba] ISC's dhcp server, radvd and bind9 now adding samba as an AD DC

So I had dhcp, radvd and bind working together nicely and now I threw in a
wrench of setting up an AD DC

I want to change my dhcp server setting to put client's into the new AD
Domain but am a little hesitant as it is all working so nicely with DDNS

I'm starting to think all I need to do is edit just my dhcpd.conf and
change occurrences of DOMAIN1.SUBDOMAIN.TLD to AD.DOMAIN2.SUBDOMAIN.TLD
A little touch up of db.self and comment out and eventually remove DOMAIN1
entries as everything is working as I like.

My concern is moving from
        allow-update { key rndc-key; };
        notify yes;
to
        update-policy {
                grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
                grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard * A
AAAA SRV CNAME;
                grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA
SRV CNAME;
        };

The latter being produced when I created the domain in the example configs
that I copied into mine.
I think what that is saying is let the domain controller by name have
access to the domain's entries
I'm a little concerned about verification as I know the key method is safe
and I'm not so sure about the grant method.

Is there a way to have samba use ISC's key method?
Anyone have any suggestions?

My current setup is as below.

My server name is the same as DOMAIN2 it has a ipv4 address of 192.168.1.1
and a ipv6 address of fc00:1::1111:1111:1111:1111
It's outside addresses are dhcp from my ISP I do ip masquerade on both ipv4
and ipv6


My dhcpd.conf looks as follows
#================START======================ddns-updates on;
ddns-update-style interim;
ddns-domainname "DOMAIN1.SUBDOMAIN.TLD.";
ddns-rev-domainname "in-addr.arpa.";
ignore client-updates;
option domain-search-order code 119 = string;
include "/etc/rndc.key";
zone DOMAIN1.SUBDOMAIN.TLD {
 primary 192.168.1.1;
 key rndc-key;
}
zone 1.168.192.in-addr.arpa. {
 primary 192.168.1.1;
 key rndc-key;
}
default-lease-time 100000;
max-lease-time 1000000;
subnet 192.168.1.0 netmask 255.255.255.0 {
 range 192.168.1.10 192.168.1.200;
 option routers 192.168.1.1;
 option domain-name "DOMAIN1.SUBDOMAIN.TLD.";
 option domain-name-servers 192.168.1.1;
 option domain-search-order
"DOMAIN1.SUBDOMAIN.TLD.,ipv6.DOMAIN1.SUBDOMAIN.TLD.";
 next-server 192.168.1.1;
 filename "/pxelinux.0";
 allow unknown-clients;
}
#================END========================
My radvd.conf looks like so
#================START======================interface eth0
{
 AdvSendAdvert on;
 prefix fc00:1::/64
 {
  AdvOnLink on;
  AdvAutonomous on;
 };
 RDNSS fc00:1::1111:1111:1111:1111 {};
};
#================END========================
My named.conf after adding my samba looks like so
#================START======================options {
        listen-on port 53 { 127.0.0.1; 192.168.1.1; };
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        allow-query     { localhost; 192.168.1.0/16; };
        recursion yes;
        dnssec-enable yes;
        dnssec-validation yes;
        dnssec-lookaside auto;
        bindkeys-file "/etc/named.iscdlv.key";
        managed-keys-directory "/var/named/dynamic";
        pid-file "/run/named/named.pid";
        session-keyfile "/run/named/session.key";
};
logging {
        channel default_debug {
                file "data/named.run";
                severity dynamic;
        };
};
zone "." IN {
        type hint;
        file "named.ca";
};
zone "ipv6.DOMAIN1.SUBDOMAIN.TLD" {
        type master;
        file "zones/db.ipv6.DOMAIN1.SUBDOMAIN.TLD";
        allow-update { key rndc-key; };
        notify yes;
};
zone "DOMAIN1.SUBDOMAIN.TLD" IN {
        type master;
        file "zones/db.DOMAIN1.SUBDOMAIN.TLD";
        allow-update { key rndc-key; };
        notify yes;
};
zone "ad.DOMAIN2.SUBDOMAIN.TLD." IN {
        type master;
        file "zones/db.ad.DOMAIN2.SUBDOMAIN.TLD";
        update-policy {
                grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
                grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard * A
AAAA SRV CNAME;
                grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA
SRV CNAME;
        };
        check-names ignore;
};
zone "DOMAIN2.SUBDOMAIN.TLD" IN { type master; file
"db.self"; };
#================END========================
content of db.self
#================START======================$TTL 604800     ; 1 week
@           IN SOA  ns.DOMAIN1.SUBDOMAIN.TLD MY.EMAIL. (
                                2014092401 ; serial
                                604800     ; refresh (1 week)
                                86400      ; retry (1 day)
                                2419200    ; expire (4 weeks)
                                604800     ; minimum (1 week)
                                )
                        NS      ns.DOMAIN1.SUBDOMAIN.TLD.
@       IN      A       192.168.1.252
@       IN      MX      10      DOMAIN2.SUBDOMAIN.TLD.
@       IN      TXT     "v=spf1 mx a -all"
#================END========================
my smb.conf looks like
#================START======================[global]
        netbios name = DOMAIN2
        realm = AD.DOMAIN2.SUBDOMAIN.TLD
        server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl,
winbindd, ntp_signd, kcc, dnsupdate
        workgroup = AD
        server role = active directory domain controller
        idmap_ldb:use rfc2307 = yes
[netlogon]
        path = /var/lib/samba/sysvol/ad.DOMAIN2.SUBDOMAIN.TLD/scripts
        read only = No
[sysvol]
        path = /var/lib/samba/sysvol
        read only = No
#================END========================

my krb5.conf looks like
#================START======================[libdefaults]
        default_realm = AD.DOMAIN2.SUBDOMAIN.TLD
        dns_lookup_realm = false
        dns_lookup_kdc = true
#================END=========================

mathias dufresne

2016-May-23 16:35 UTC

head link

[Samba] ISC's dhcp server, radvd and bind9 now adding samba as an AD DC

Hi,

Why modifying a working conf when you can build your DC on others systems
(VM)? That could be really nice to learn but you add a lot of complexity in
your process, I think.
Why not using DLZ to access your AD zones? I expect Bind to be able to mix
its behaviour: flat file for some zone, DLZ for others...

Now regarding:
update-policy {
                grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
                grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard * A
AAAA SRV CNAME;
                grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA
SRV CNAME;
};
For me this means:
grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
Grant any authenticated user (from domain AD.DOMAIN2.SUBDOMAIN.TLD) to
modify A and AAAA it owns (ms-self) from any host (*).

grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA SRV CNAME;
Grant administrator from domain AD.DOMAIN2.SUBDOMAIN.TLD to do anything on
any A AAAA SRV CNAME from any host

same for last one.

I'm really a new comer to DNS world, these thoughts come from
http://docstore.mik.ua/orelly/networking_2ndEd/dns/ch10_02.htm

These lines should make your Bind to use Kerberos. At least I do hope the
authentication is Kerberos (that's AD!). If it is kerberos authentication,
I expect you can rely on it as almost the whole world rely on Kerberos
these days : )

A last thing regarding ISC's key method:
https://bugzilla.samba.org/show_bug.cgi?id=11520
I don't meant this bug as something to do with what you want to achieve,
simply it could be a good thing to read if you understand anything to ISC's
key method (that I don't), perhaps you could find some leads to follow or
some information to avoid that configuration.

Sorry not to help more. Have a nice day,

mathias



2016-05-18 18:13 GMT+02:00 Jeff Sadowski <jeff.sadowski at gmail.com>:
> So I had dhcp, radvd and bind working together nicely and now I threw in a
> wrench of setting up an AD DC
>
> I want to change my dhcp server setting to put client's into the new AD
> Domain but am a little hesitant as it is all working so nicely with DDNS
>
> I'm starting to think all I need to do is edit just my dhcpd.conf and
> change occurrences of DOMAIN1.SUBDOMAIN.TLD to AD.DOMAIN2.SUBDOMAIN.TLD
> A little touch up of db.self and comment out and eventually remove DOMAIN1
> entries as everything is working as I like.
>
> My concern is moving from
>         allow-update { key rndc-key; };
>         notify yes;
> to
>         update-policy {
>                 grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
>                 grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard *
A
> AAAA SRV CNAME;
>                 grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA
> SRV CNAME;
>         };
>
> The latter being produced when I created the domain in the example configs
> that I copied into mine.
> I think what that is saying is let the domain controller by name have
> access to the domain's entries
> I'm a little concerned about verification as I know the key method is
safe
> and I'm not so sure about the grant method.
>
> Is there a way to have samba use ISC's key method?
> Anyone have any suggestions?
>
> My current setup is as below.
>
> My server name is the same as DOMAIN2 it has a ipv4 address of 192.168.1.1
> and a ipv6 address of fc00:1::1111:1111:1111:1111
> It's outside addresses are dhcp from my ISP I do ip masquerade on both
ipv4
> and ipv6
>
>
> My dhcpd.conf looks as follows
> #================START======================> ddns-updates on;
> ddns-update-style interim;
> ddns-domainname "DOMAIN1.SUBDOMAIN.TLD.";
> ddns-rev-domainname "in-addr.arpa.";
> ignore client-updates;
> option domain-search-order code 119 = string;
> include "/etc/rndc.key";
> zone DOMAIN1.SUBDOMAIN.TLD {
>  primary 192.168.1.1;
>  key rndc-key;
> }
> zone 1.168.192.in-addr.arpa. {
>  primary 192.168.1.1;
>  key rndc-key;
> }
> default-lease-time 100000;
> max-lease-time 1000000;
> subnet 192.168.1.0 netmask 255.255.255.0 {
>  range 192.168.1.10 192.168.1.200;
>  option routers 192.168.1.1;
>  option domain-name "DOMAIN1.SUBDOMAIN.TLD.";
>  option domain-name-servers 192.168.1.1;
>  option domain-search-order
> "DOMAIN1.SUBDOMAIN.TLD.,ipv6.DOMAIN1.SUBDOMAIN.TLD.";
>  next-server 192.168.1.1;
>  filename "/pxelinux.0";
>  allow unknown-clients;
> }
> #================END========================>
> My radvd.conf looks like so
> #================START======================> interface eth0
> {
>  AdvSendAdvert on;
>  prefix fc00:1::/64
>  {
>   AdvOnLink on;
>   AdvAutonomous on;
>  };
>  RDNSS fc00:1::1111:1111:1111:1111 {};
> };
> #================END========================>
> My named.conf after adding my samba looks like so
> #================START======================> options {
>         listen-on port 53 { 127.0.0.1; 192.168.1.1; };
>         listen-on-v6 port 53 { ::1; };
>         directory       "/var/named";
>         dump-file       "/var/named/data/cache_dump.db";
>         statistics-file "/var/named/data/named_stats.txt";
>         memstatistics-file "/var/named/data/named_mem_stats.txt";
>         allow-query     { localhost; 192.168.1.0/16; };
>         recursion yes;
>         dnssec-enable yes;
>         dnssec-validation yes;
>         dnssec-lookaside auto;
>         bindkeys-file "/etc/named.iscdlv.key";
>         managed-keys-directory "/var/named/dynamic";
>         pid-file "/run/named/named.pid";
>         session-keyfile "/run/named/session.key";
> };
> logging {
>         channel default_debug {
>                 file "data/named.run";
>                 severity dynamic;
>         };
> };
> zone "." IN {
>         type hint;
>         file "named.ca";
> };
> zone "ipv6.DOMAIN1.SUBDOMAIN.TLD" {
>         type master;
>         file "zones/db.ipv6.DOMAIN1.SUBDOMAIN.TLD";
>         allow-update { key rndc-key; };
>         notify yes;
> };
> zone "DOMAIN1.SUBDOMAIN.TLD" IN {
>         type master;
>         file "zones/db.DOMAIN1.SUBDOMAIN.TLD";
>         allow-update { key rndc-key; };
>         notify yes;
> };
> zone "ad.DOMAIN2.SUBDOMAIN.TLD." IN {
>         type master;
>         file "zones/db.ad.DOMAIN2.SUBDOMAIN.TLD";
>         update-policy {
>                 grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
>                 grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard *
A
> AAAA SRV CNAME;
>                 grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA
> SRV CNAME;
>         };
>         check-names ignore;
> };
> zone "DOMAIN2.SUBDOMAIN.TLD" IN { type master; file
"db.self"; };
> #================END========================>
> content of db.self
> #================START======================> $TTL 604800     ; 1 week
> @           IN SOA  ns.DOMAIN1.SUBDOMAIN.TLD MY.EMAIL. (
>                                 2014092401 ; serial
>                                 604800     ; refresh (1 week)
>                                 86400      ; retry (1 day)
>                                 2419200    ; expire (4 weeks)
>                                 604800     ; minimum (1 week)
>                                 )
>                         NS      ns.DOMAIN1.SUBDOMAIN.TLD.
> @       IN      A       192.168.1.252
> @       IN      MX      10      DOMAIN2.SUBDOMAIN.TLD.
> @       IN      TXT     "v=spf1 mx a -all"
> #================END========================>
> my smb.conf looks like
> #================START======================> [global]
>         netbios name = DOMAIN2
>         realm = AD.DOMAIN2.SUBDOMAIN.TLD
>         server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl,
> winbindd, ntp_signd, kcc, dnsupdate
>         workgroup = AD
>         server role = active directory domain controller
>         idmap_ldb:use rfc2307 = yes
> [netlogon]
>         path = /var/lib/samba/sysvol/ad.DOMAIN2.SUBDOMAIN.TLD/scripts
>         read only = No
> [sysvol]
>         path = /var/lib/samba/sysvol
>         read only = No
> #================END========================>
>
> my krb5.conf looks like
> #================START======================> [libdefaults]
>         default_realm = AD.DOMAIN2.SUBDOMAIN.TLD
>         dns_lookup_realm = false
>         dns_lookup_kdc = true
> #================END========================> --
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/options/samba
>

Jeff Sadowski

2016-May-27 13:37 UTC

head link

[Samba] ISC's dhcp server, radvd and bind9 now adding samba as an AD DC

I had left my config alone for now and dhcp still writes to
DOMAIN1.SUBDOMAIN.TLD.  But samba has been complaining about not being able
to write to bind in its zone.

[2016/05/27 07:30:06.738434,  0]
../source4/dsdb/dns/dns_update.c:295(dnsupdate_nameupdate_done)
../source4/dsdb/dns/dns_update.c:295: Failed DNS update -
NT_STATUS_UNSUCCESSFUL

If you are right about it using kerberos I think I am missing a bit more
configuration to allow bind to use kerberos. I have a place for it to use
the key but nothing in it about kerberos and how to verify that.

On Mon, May 23, 2016 at 10:35 AM, mathias dufresne <infractory at
gmail.com>
wrote:
> Hi,
>
> Why modifying a working conf when you can build your DC on others systems
> (VM)? That could be really nice to learn but you add a lot of complexity in
> your process, I think.
> Why not using DLZ to access your AD zones? I expect Bind to be able to mix
> its behaviour: flat file for some zone, DLZ for others...
>
> Now regarding:
> update-policy {
>                 grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
>                 grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard *
A
> AAAA SRV CNAME;
>                 grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA
> SRV CNAME;
> };
> For me this means:
> grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
> Grant any authenticated user (from domain AD.DOMAIN2.SUBDOMAIN.TLD) to
> modify A and AAAA it owns (ms-self) from any host (*).
>
> grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD wildcard * A AAAA SRV
CNAME;
> Grant administrator from domain AD.DOMAIN2.SUBDOMAIN.TLD to do anything on
> any A AAAA SRV CNAME from any host
>
> same for last one.
>
> I'm really a new comer to DNS world, these thoughts come from
> http://docstore.mik.ua/orelly/networking_2ndEd/dns/ch10_02.htm
>
> These lines should make your Bind to use Kerberos. At least I do hope the
> authentication is Kerberos (that's AD!). If it is kerberos
authentication,
> I expect you can rely on it as almost the whole world rely on Kerberos
> these days : )
>
> A last thing regarding ISC's key method:
> https://bugzilla.samba.org/show_bug.cgi?id=11520
> I don't meant this bug as something to do with what you want to
achieve,
> simply it could be a good thing to read if you understand anything to
ISC's
> key method (that I don't), perhaps you could find some leads to follow
or
> some information to avoid that configuration.
>
> Sorry not to help more. Have a nice day,
>
> mathias
>
>
>
> 2016-05-18 18:13 GMT+02:00 Jeff Sadowski <jeff.sadowski at
gmail.com>:
>
>> So I had dhcp, radvd and bind working together nicely and now I threw
in a
>> wrench of setting up an AD DC
>>
>> I want to change my dhcp server setting to put client's into the
new AD
>> Domain but am a little hesitant as it is all working so nicely with
DDNS
>>
>> I'm starting to think all I need to do is edit just my dhcpd.conf
and
>> change occurrences of DOMAIN1.SUBDOMAIN.TLD to AD.DOMAIN2.SUBDOMAIN.TLD
>> A little touch up of db.self and comment out and eventually remove
DOMAIN1
>> entries as everything is working as I like.
>>
>> My concern is moving from
>>         allow-update { key rndc-key; };
>>         notify yes;
>> to
>>         update-policy {
>>                 grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
>>                 grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD
wildcard * A
>> AAAA SRV CNAME;
>>                 grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A
AAAA
>> SRV CNAME;
>>         };
>>
>> The latter being produced when I created the domain in the example
configs
>> that I copied into mine.
>> I think what that is saying is let the domain controller by name have
>> access to the domain's entries
>> I'm a little concerned about verification as I know the key method
is safe
>> and I'm not so sure about the grant method.
>>
>> Is there a way to have samba use ISC's key method?
>> Anyone have any suggestions?
>>
>> My current setup is as below.
>>
>> My server name is the same as DOMAIN2 it has a ipv4 address of
192.168.1.1
>> and a ipv6 address of fc00:1::1111:1111:1111:1111
>> It's outside addresses are dhcp from my ISP I do ip masquerade on
both
>> ipv4
>> and ipv6
>>
>>
>> My dhcpd.conf looks as follows
>> #================START======================>> ddns-updates on;
>> ddns-update-style interim;
>> ddns-domainname "DOMAIN1.SUBDOMAIN.TLD.";
>> ddns-rev-domainname "in-addr.arpa.";
>> ignore client-updates;
>> option domain-search-order code 119 = string;
>> include "/etc/rndc.key";
>> zone DOMAIN1.SUBDOMAIN.TLD {
>>  primary 192.168.1.1;
>>  key rndc-key;
>> }
>> zone 1.168.192.in-addr.arpa. {
>>  primary 192.168.1.1;
>>  key rndc-key;
>> }
>> default-lease-time 100000;
>> max-lease-time 1000000;
>> subnet 192.168.1.0 netmask 255.255.255.0 {
>>  range 192.168.1.10 192.168.1.200;
>>  option routers 192.168.1.1;
>>  option domain-name "DOMAIN1.SUBDOMAIN.TLD.";
>>  option domain-name-servers 192.168.1.1;
>>  option domain-search-order
>> "DOMAIN1.SUBDOMAIN.TLD.,ipv6.DOMAIN1.SUBDOMAIN.TLD.";
>>  next-server 192.168.1.1;
>>  filename "/pxelinux.0";
>>  allow unknown-clients;
>> }
>> #================END========================>>
>> My radvd.conf looks like so
>> #================START======================>> interface eth0
>> {
>>  AdvSendAdvert on;
>>  prefix fc00:1::/64
>>  {
>>   AdvOnLink on;
>>   AdvAutonomous on;
>>  };
>>  RDNSS fc00:1::1111:1111:1111:1111 {};
>> };
>> #================END========================>>
>> My named.conf after adding my samba looks like so
>> #================START======================>> options {
>>         listen-on port 53 { 127.0.0.1; 192.168.1.1; };
>>         listen-on-v6 port 53 { ::1; };
>>         directory       "/var/named";
>>         dump-file       "/var/named/data/cache_dump.db";
>>         statistics-file "/var/named/data/named_stats.txt";
>>         memstatistics-file
"/var/named/data/named_mem_stats.txt";
>>         allow-query     { localhost; 192.168.1.0/16; };
>>         recursion yes;
>>         dnssec-enable yes;
>>         dnssec-validation yes;
>>         dnssec-lookaside auto;
>>         bindkeys-file "/etc/named.iscdlv.key";
>>         managed-keys-directory "/var/named/dynamic";
>>         pid-file "/run/named/named.pid";
>>         session-keyfile "/run/named/session.key";
>> };
>> logging {
>>         channel default_debug {
>>                 file "data/named.run";
>>                 severity dynamic;
>>         };
>> };
>> zone "." IN {
>>         type hint;
>>         file "named.ca";
>> };
>> zone "ipv6.DOMAIN1.SUBDOMAIN.TLD" {
>>         type master;
>>         file "zones/db.ipv6.DOMAIN1.SUBDOMAIN.TLD";
>>         allow-update { key rndc-key; };
>>         notify yes;
>> };
>> zone "DOMAIN1.SUBDOMAIN.TLD" IN {
>>         type master;
>>         file "zones/db.DOMAIN1.SUBDOMAIN.TLD";
>>         allow-update { key rndc-key; };
>>         notify yes;
>> };
>> zone "ad.DOMAIN2.SUBDOMAIN.TLD." IN {
>>         type master;
>>         file "zones/db.ad.DOMAIN2.SUBDOMAIN.TLD";
>>         update-policy {
>>                 grant AD.DOMAIN2.SUBDOMAIN.TLD ms-self * A AAAA;
>>                 grant Administrator at AD.DOMAIN2.SUBDOMAIN.TLD
wildcard * A
>> AAAA SRV CNAME;
>>                 grant DOMAIN2$@ad.DOMAIN2.SUBDOMAIN.TLD wildcard * A
AAAA
>> SRV CNAME;
>>         };
>>         check-names ignore;
>> };
>> zone "DOMAIN2.SUBDOMAIN.TLD" IN { type master; file
"db.self"; };
>> #================END========================>>
>> content of db.self
>> #================START======================>> $TTL 604800     ;
1 week
>> @           IN SOA  ns.DOMAIN1.SUBDOMAIN.TLD MY.EMAIL. (
>>                                 2014092401 ; serial
>>                                 604800     ; refresh (1 week)
>>                                 86400      ; retry (1 day)
>>                                 2419200    ; expire (4 weeks)
>>                                 604800     ; minimum (1 week)
>>                                 )
>>                         NS      ns.DOMAIN1.SUBDOMAIN.TLD.
>> @       IN      A       192.168.1.252
>> @       IN      MX      10      DOMAIN2.SUBDOMAIN.TLD.
>> @       IN      TXT     "v=spf1 mx a -all"
>> #================END========================>>
>> my smb.conf looks like
>> #================START======================>> [global]
>>         netbios name = DOMAIN2
>>         realm = AD.DOMAIN2.SUBDOMAIN.TLD
>>         server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc,
drepl,
>> winbindd, ntp_signd, kcc, dnsupdate
>>         workgroup = AD
>>         server role = active directory domain controller
>>         idmap_ldb:use rfc2307 = yes
>> [netlogon]
>>         path = /var/lib/samba/sysvol/ad.DOMAIN2.SUBDOMAIN.TLD/scripts
>>         read only = No
>> [sysvol]
>>         path = /var/lib/samba/sysvol
>>         read only = No
>> #================END========================>>
>>
>> my krb5.conf looks like
>> #================START======================>> [libdefaults]
>>         default_realm = AD.DOMAIN2.SUBDOMAIN.TLD
>>         dns_lookup_realm = false
>>         dns_lookup_kdc = true
>> #================END========================>> --
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>> instructions:  https://lists.samba.org/mailman/options/samba
>>
>
>

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