Samba 4 - domain controller
Prereq
Install
apt-get install build-essential libacl1-dev libattr1-dev \ libblkid-dev libgnutls-dev libreadline-dev python-dev \ python-dnspython gdb pkg-config libpopt-dev libldap2-dev \ dnsutils libbsd-dev attr krb5-user docbook-xsl libcups2-dev acl samba
Verify correct filesystem support
Install/setup ntpd
# Associate to the public NTP pool servers server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org # Location of drift file driftfile /var/lib/ntp/ntp.drift # Location of the log file logfile /var/log/ntp # Location of the update directory ntpsigndsocket /var/lib/samba/ntp_signd/ # Restrictions restrict default kod nomodify notrap nopeer mssntp restrict 127.0.0.1 restrict 0.pool.ntp.org mask 255.255.255.255 nomodify notrap nopeer noquery restrict 1.pool.ntp.org mask 255.255.255.255 nomodify notrap nopeer noquery restrict 2.pool.ntp.org mask 255.255.255.255 nomodify notrap nopeer noquery
Copy kerberos conf
( Default configs should have been created by now ... )
mv /etc/krb5.conf{,.default}
cp /var/lib/samba/private/krb5.conf /etc
Setup as domain controller
samba-tool domain provision --use-rfc2307 --interactive --use-xattrs=yes
Argument Explanations
--use-rfc2307
this argument adds POSIX attributes (UID/GID) to the AD Schema. This will be necessary if you intend to authenticate Linux, BSD, or OS X clients (including the local machine) in addition to Microsoft Windows.
--use-xattrs=yes
this argument enables the use of unix extended attributes (ACLs) for files hosted on this server. If you intend not have file shares on the domain controller, you can omit this switch (but this is not recommended). You should also ensure that any filesystems that will host Samba shares are mounted with support for ACLs.
--interactive
this parameter forces the provision script to run interactively. Alternately, you can review the help for the provision step by running samba-tool domain provision --help
Setup replicator/secondary domain controller
Install and setup a server with the above but stop short of running the samba-tool domain provision ... cmd
Make sure you can use the nameserver the existing DC is using (ie point your namserver whatever the existing one is using).
Start replication:
samba-tool domain join HQ.SKYTECH.DK DC -Uadministrator --realm=HQ.SKYTECH.DK
I had to manually create both dns on the PDC -
Basically, follow the checklist here: https://wiki.samba.org/index.php/Samba4/HOWTO/Join_a_domain_as_a_DC#Check_required_DNS_entries_of_the_new_host
Since I was setting up a new DC paired with another Samba setup I could skip the part about "repadm ..."
Check replication status:
samba-tool drs showrepl
Switching to 'backup' DC if PDC dies horribly
The extra DC will take over if the primary goes down - but if you want to promote the 'backup' one you can do the win equiv of dcpromo with:
samba-tool fsmo seize --role=all* * Be sure to understand all the fsmo roles before doing this! Also if they're distributed to forest zones/machines/dc make sure to account for them all.
- More info here: https://wiki.samba.org/index.php/Samba4/HOWTO/Join_a_domain_as_a_DC#FSMO_role_transfer
Docs/guides/troubleshooting
Found inspirations @ various sites:
- [Seems like a good place to start] - http://ubuntuforums.org/showthread.php?t=2146198
- https://wiki.archlinux.org/index.php/Samba_4_Active_Directory_Domain_Controller
- http://wiki.samba.org/index.php/DNS
- http://www.golinuxhub.com/2013/06/samba-41-as-active-directory.html
- [getting windows machines on the new AD] - http://wiki.samba.org/index.php/Configuring_a_windows_client_for_AD
- [Kerberos] - https://help.ubuntu.com/10.04/serverguide/kerberos.html
Also I had some issues with DNS - make sure it is pointing to the ip of the machine running samba.
Administering DC via windows 7 / Win XP
To administer it with a windows setup, one must download RSAT ( http://www.microsoft.com/en-us/download/details.aspx?id=7887 ).
After installation enable the Active directory mmc pages from "Windows default programs".
Make sure you're logged into the domain as administrator (or put your user in domain-admin group) on the win-machine and then fire up mmc. Now you can control everything from here.
Group Policy
Everything except setting password complexity seems to work
Setting password complexity
I couldn't get password complexity to work with the samba server and it is currently not working.
It has to be done from the command line:
~# samba-tool domain passwordsettings set --complexity=off Password complexity deactivated! All changes applied successfully! ~# samba-tool domain passwordsettings show --complexity=off Password informations for domain 'DC=hq,DC=skytech,DC=dk' Password complexity: off Store plaintext passwords: off Password history length: 24 Minimum password length: 7 Minimum password age (days): 1 Maximum password age (days): 42 (samba-tool domain passwordsettings --help to get more info about options)