Latest revision as of 12:47, 26 September 2014

This is a dummy page, stuff will be wrong on this page, used for editing before pushing out to other wikis

Purpose

The purpose of this wiki page is to document the steps needed to set up or recreate an Active Directory(AD) Environment using Samba 4. Not all features of a Windows Server AD are incorporated into Samba 4, such as DFS and others, will try and document what you can and can not accomplish at the moment with Samba 4. At the time of writing/editing the current version of Samba 4 being used is: 4.1.12

Current operating system Samba 4 is run on: Centos 6.5

Will try and make this page as simple to recreate using the same environment, however if confused or have no idea where to begin I recommend heading over to the Samba Wiki pages and reading there How To's and Documentation:

If still confused over anything I would recommend googling it, all of this I have found over the internet from different resources and will try and incorporate them into this wiki. For a complete list of all the references I found extremely useful see the bottom of this page.

Note: Until this message removed consider the following a work in progress

Install

Install CentOS

Install a minimal install of CentOS 6.5, at time of writing can be downloaded here:

http://mirrors.usc.edu/pub/linux/distributions/centos/6.5/isos/x86_64/CentOS-6.5-x86_64-minimal.iso

If you prefer to use a gui or a full install go check out the CentOS mirrors list:

http://isoredirect.centos.org/centos/6/isos/x86_64/

I would not recommend using CentOS 7 as the install procedure, startup service, as well as packages are a bit different, that being said it is entirely possible to get Samba 4 working on CentOS 7, if I have time and am upgrading I may come back and add in the changes CentOS 7 requires.

Samba 4 Requirements

Here are the OS Requirements as listed by the Samba Team:

https://wiki.samba.org/index.php/OS_Requirements

Basically for a working Active Directory on CentOS install it is required that your system support Extended File Attributes.

Here are the packages I needed to install to build Samba 4, please note that all of these packages are probably not required and you are free to use the minimal list provided in the Samba Wiki, I have been trying to weed out most of the packages not needed and will be updating as I find extras, but as this is how a working setup was accomplished(with extra features not needed to just compile a basic Samba 4 server) I will leave this up for now:

 yum install gcc libacl-devel libblkid-devel gnutls-devel \
  readline-devel python-devel gdb pkgconfig krb5-workstation \
  zlib-devel setroubleshoot-server libaio-devel \
  setroubleshoot-plugins policycoreutils-python \
  libsemanage-python setools-libs-python setools-libs \
  popt-devel libpcap-devel sqlite-devel libidn-devel \
  libxml2-devel libacl-devel libsepol-devel libattr-devel \
  keyutils-libs-devel cyrus-sasl-devel cups-devel bind-utils \
  glibc glibc-devel gcc libacl-devel krb5-server krb5-workstation krb5-libs pam_krb5 make gnutls-devel \
  openldap-devel openldap-clients openldap-servers openldap-servers-sql \
  openssl-devel bind bind-libs bind-utils libblkid-devel readline-devel gdb python-devel cups sqlite-devel \
  setroubleshoot-server popt-devel libxml2-devel libpcap-devel libidn-devel cups-devel ctdb-devel pam-devel gnutls-devel \
  krb5-server-ldap nss-pam-ldapd pam_ldap openssh-ldap python-ldap docbook-style-xsl vim wget

Once CentOS is installed, give it hostname as well as static IP Address, this can be done thorugh DHCP or by manually editing CentOS network scripts

vim /etc/sysconfig/network

Edit "HOSTNAME=***" to say "HOSTNAME=samba" or whatever you want to name the server
Manually edit or add network-scripts if not there

cd /etc/sysconfig/network-scripts/
vim ifcfg-eth0

Make sure these options are included

DEVICE=eth0
HWADDR=**:**:**:**:**:**
TYPE=ETHERNET
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=dhcp

For a static IP Address, go look at an example here: https://gist.github.com/fernandoaleman/2172388 (or just google how to give centos a static ip)
Restart the network service

service network restart

For the purpose of saving time I have setup CentOS with selinux disabled, check to see this allowed by your Organization/Company before disabling selinux(this could be potentially dangerous depending on your network setup). Google Samba 4 selinux or visit the Samba Wiki here: https://wiki.samba.org/index.php/Samba_AD_DC_access_control_settings , if time allows I may come back and try to incorporate selinux into this wiki

To disable selinux

vim /etc/sysconfig/selinux

Change "SELINUX=enforcing" to "SELINUX=disabled"
Restart the computer

shutdown -r now

Installing Samba

Decide what version of Samba 4 you would like to use, if your demoing or a developer consider using the newer developer version. Note: May have bugs and is not suitable in a production environment

For developers:
install git

yum install git-core
git clone git://git.samba.org/samba.git ~/samba-master

For stable Samba version visit: http://www.samba.org/
or(as of 09-26-14):

wget http://www.samba.org/samba/ftp/stable/samba-4.1.12.tar.gz

Extract the archive if not done so already

tar -zxvf samba-4.1.12.tar.gz

Build the samba install, replace samba-master with samba-[Version#]

cd ~/samba-master
./configure --enable-debug --enable-selftest

If it completes successfully, make sure it is Building with Active Directory support, if not you may have forgotten a few packages
Finally compile and then install

make
make install

Creating script for starting and stopping samba service

cd /etc/init.d
cp rdisc samba
vim samba
:%s/rdisc/samba/g
:wq

change daemon location from /sbin/samba to /usr/loca/samba/sbin/samba, as well as killproc location
Delete RDISCOPT variable, remove usage from daemon command
change what gets echoed to the screen

Enabling Samba 4 as DC

add samba path to $PATH

echo 'export PATH=$PATH:/usr/local/samba/bin' >> ~/.bashrc
echo 'export PATH=$PATH:/usr/local/samba/sbin' >> ~/.bashrc

run command

/usr/local/samba/bin/samba-tool domain provision

the domain-provision tool should pick all defaults automatically, however they can be changed to your liking
once the provision tool has finished successfully restart the server

shutdown -r now

once system has started enable samba 4 and add it start at boot, change to start with chkconfig after service script is created

/usr/local/samba/sbin/samba
vim /etc/rc.d/rc.local

append "/usr/local/samba/sbin/samba" without quotations to the end of the file and then save
samba version as well as samba client version can be checked using the following commands

/usr/local/samba/sbin/samba -V
/usr/local/samba/bin/smbclient --version

Configuring DNS

DNS forwarding was set up on the domain provision ing using the samba-tool

cat /usr/local/samba/etc/smb.conf

there should be a line under "[global]" that says "dns forwarder = ***.***.***.***", if not it was not enabled during domain provisioning
edit resolv.conf

vim /etc/resolv.conf

edit to look exactly like:

domain mydomain.com
nameserver 128.***.***.**

where "128.***.***.***" is the ipaddress of the centos server
next go back and edit ifcfg-eth0 in network-scripts

vim /etc/sysconfig/network-scripts/ifcfg-eth0

change the file to look like this

DEVICE="eth0"
BOOTPROTO="none"
DNS1="128.***.***.**" #this is host ipaddress
GATEWAY=128.**.***.*
HWADDR="84:B4:C1:0A:**:**"
IPADDR="128.***.***.**"
IPV6INIT="no"
NM_CONTROLLED="yes"
ONBOOT="yes"
PREFIX="24"
TYPE="Ethernet"

reboot so that all changes may take effect

shutdown -r now

login and test that the DNS is working properly

host -t SRV _ldap._tcp.mydomain.com

where mydomain.com is then name of the domain you are on
output should look like, where samba is the hostname of your server

_ldap._tcp.mydomain.com has SRV record 0 100 389 samba.mydomain.com

test with

host -t SRV _kerberos._udp.mydomain.com

output

_kerberos._udp.mydomain.com has SRV record 0 100 88 samba.mydomain.com

last test

host -t A samba.mydomain.com.

output should return your ip adddress

samba.mydomain.com has address 192.168.0.2

if test did not produce those outputs DNS has not been configured properly

Firewall

settings:

-A INPUT -p tcp --dport 53 -j ACCEPT
-A INPUT -p udp --dport 53 -j ACCEPT
-A INPUT -p udp --dport 137:138 -j ACCEPT
-A INPUT -p tcp --dport 139 -j ACCEPT
-A INPUT -p tcp --dport 445 -j ACCEPT
-A INPUT -p tcp --dport 135 -j ACCEPT
-A INPUT -p tcp --dport 88 -j ACCEPT
-A INPUT -p udp --dport 88 -j ACCEPT
-A INPUT -p tcp --dport 464 -j ACCEPT
-A INPUT -p tcp --dport 389 -j ACCEPT
-A INPUT -p udp --dport 389 -j ACCEPT
-A INPUT -p tcp --dport 1024 -j ACCEPT
 
-A INPUT -p tcp --dport 636 -j ACCEPT
-A INPUT -p tcp --dport 3268 -j ACCEPT
-A INPUT -p tcp --dport 3269 -j ACCEPT
-A INPUT -p udp --dport 445 -j ACCEPT
-A INPUT -p tcp --dport 25 -j ACCEPT
-A INPUT -p tcp --dport 135 -j ACCEPT
-A INPUT -p tcp --dport 5722 -j ACCEPT
-A INPUT -p udp --dport 464 -j ACCEPT
-A INPUT -p tcp --dport 137 -j ACCEPT

Kerberos

make a backup of original kerberos file and replace it with the copy generated by samba

mv /etc/krb5.conf /etc/krb5.conf.bak
cp /usr/local/samba/share/setup/krb5.conf /etc/krb5.conf

edit the new krb5.conf file and change the ${REALM} variable to the realm selected during domain provisioning, ALL CAPS

vim /etc/krb5.conf

test Kerberos using the kinit command

kinit administrator@MYDOMAIN.COM

if Kerberos is working you will be asked for your password
verify that it is working by running klist, output should look something along the lines of

Ticket cache: FILE:/tmp/krb5cc_0
Default principal: administrator@MYDOMAIN.COM

Valid starting Expires Service principal
07/25/13 15:23:33 07/26/13 1:23:33 krbtgt/MYDOMAIN.COM@MYDOMAIN.COM
renew until 07/26/13 15:23:31

NTP

install ntp

yum install ntp

start ntp

/etc/init.d/ntpd start

add ntp to start up

chkconfig ntpd on

Windows Domain

Add Windows computer to domain

manually edit network settings to point DNS to samba4 server
assign static ip so there are no problems with joining computers to domain
ping samba4 server at ip address to verify you can see it

ping 128.***.***.****

ping FQDN to verify DNS is working

ping samba4.mydomain.com

should get replies form both verifying that you can communicate with server and that DNS is functioning
run the date command in your server

date

Change the date and time on Windows Computer so that it is within a few seconds of the server, Kerberos requires the times between computers be no more than a few seconds apart
Right click on "My Computer" and click "Properties"
Under "Computer name, domain, and workgroup settings" click change settings
Under "Member of" check "Domain"
Type in the name of your domain in full uppercase letters, ex.
- MYDOMAIN.COM
When asked enter in the username and password for the Administrator created during the samba-tool domain provisioning
Once you have joined the domain restart the computer and you can now log in to the domain

Adding Profile path to Samba

make a folder where the profiles will be stored

mkdir /usr/local/samba/var/profiles

Add the following to smb.conf to inlcude that location

vim /usr/local/samba/var/profiles

[profiles]
path = /usr/local/samba/etc/smb.conf
read only = No

restart samba

/usr/local/samba/bin/smbcontrol all reload-config

once restarted check the shares on your samba server, profiles should appear under there

smbclient -L localhost -U%

Change Security on Profiles folder

login to the domain as administrator onto a windows 7 computer
open up my computer and navigate to "\\servername" , ex. "\\samba4"
Right Click on the folder and select properties
Change security to allow Domain Administrators Full Control
add Domain Users to Security with options, Traverse folder/execute file. List Folder/read data, Create folder/append data

Install RSAT

Download Remote Server Administration Tool from the microsoft website, http://www.microsoft.com/en-us/download/details.aspx?id=7887
Install, Once installed open up control panel and then open up programs, then programs and features
on the left pane click "Turn Windows features on or off"
Select all under Remote Server Administration Tool, then click okay

Adding User and profile path

From a windows computer with RSAT installed run: dsa.msc
create a new user and edit its properties to include a profile path of "\\servername\profiles\%USERNAME%"
then run: gpupdate /force
Login with new user on domain and roaming profile will be created under /usr/local/samba/var/profiles on the server
If you're having Group Policy Issues you can view what has been applied by gpresult
From command line run:

gpresult /H filename.html

or if you only want Computer Configuration(must be run as an administrator)

gpresult /SCOPE COMPUTER /H filename.html

Login with new user on domain and roaming profile will be created under /usr/local/samba/var/profiles on the server

Folder Security

create a share for where users folder redirections will go, want on a NFS, demoing on local drive

[users]
       path = usr/local/samba/var/data/users
       comment = temp user folders for folder redirection, move to NFS
       read only = No

make the folder or have the NFS mouted

mkdir -p usr/local/samba/var/data/users
chown root:3000000 usr/local/samba/var/data/users
chmod 755 usr/local/samba/var/data/users

login into windows computer using a domain administrator to change permissions on users folder
navigate to users folder on windows computer \\domainame.edu
right click on users folder and select properties, go to security tab, click on advanced, click change permissions
remove all current permissions, add new permissions making sure "Include inheritable permissions from the object's parents" is NOT checked
add:
- Administrator: Full Control : This Folder, Subfolder, and Files
- Domain Admins: Full Control : This Folder, Subfolder, and Files
- SYSTEM: Full Control : This Folder, Subfolder, and Files
- CREATOR OWNER: Full Control : Subfolder, and Files
- Authenticated Users: Traverse Folder/Execute FIle, List Folder/Read Data, Create Files/Write Data, Create Folders/Append Data, Change Permissions: This Folder Only
restart service and check that settings stay
using getfacl

getfacl /data/users

returns

# file: users
# owner: root
# group: root
user::rwx
user:root:rwx
group::---
group:root:---
group:3000002:rwx
group:3000003:rwx
group:3000008:rwx
mask::rwx
other::---
default:user::rwx
default:user:root:rwx
default:group::---
default:group:root:---
default:group:3000002:rwx
default:group:3000008:rwx
default:mask::rwx
default:other::---

Folder Redirection with GPO

Download admx files for windows 7/2008 and place them in \\mydomain.edu\sysvol\domainname.edu\policies\PolicyDefinitions
service samba restart
Create OU in AD and add a couple users
Open up Group Policy Management
Do not edit default domain policy, instead right click on the OU, Create GPO and link to OU
edit linked GPO
Go to User Configuration => Policies => Windows Settings => Folder Redirection
Click each folder and change setting under "Target" tab to:
- Setting: Basic - Redirect everyone's folder to the same location
- Target Folder Location: Create a folder for each user under the root path
- Root path:\\MYDOMAIN.EDU\users
under the "Settings" tab
- Uncheck "Grant the user exclusive rights to (name_of_folder)"
- under policy removal: Leave the folder in the new location when policy is removed should remain checked
Since folder redirection windows will ask for conformation every time you try and open a shortcut because they are stored on NFS
Go to User Configuration => Policies => Windows Settings => Internet Explorer Maintenance => Security
- NOTE!!!: This can only be done from a Windows 7 Machine running RSAT, server 2012 and Windows 8 deprecated this feature
- reference:https://social.technet.microsoft.com/Forums/windowsserver/en-US/1f6a0d43-e81f-4038-88f6-75d8921fdf82/missing-group-policy-internet-explorer-maintenance
Double Click Security Zones and Content Ratings
A windows may pop up before you can edit settings click "continue"
click modify settings, click on Local intranet, click Sites, click Advanced
add:

file://mydomain.edu

click, close, OK, OK, and Apply
Configuring Automatic Resolution Policy(when sync conflicts rise keep the last modified file)
Navigate to Computer Configuration => Preferences => Windows Settings => Registry
create a new registry item
add: Software\Microsoft\Windows\CurrentVersion\NetCache\SyncConflictHandling :to the key path
in the UNC path add the share you want to Auto resolve conflicts with, \\DOMAIN\users
set Value Data to 4
- 0-7:
  - 1:Keep the local state. This overwrites the remote copy with the local copy's contents. If the local copy was deleted, this deletes the remote copy on the server.
  - 2:Keep the remote state. This overwrites the local copy with the remote copy's contents. If the remote copy was deleted, this deletes the local copy in the Offline Files cache.
  - 4:Retains the state of the latest operation as determined by last-change times of the items in conflict. If the local item was deleted, the time of deletion is used for comparison.
save and apply

Map a Network Drive with GPO

Go to User Configuration => Preferences => Windows Settings => Drive Maps
Create new mapped drive with:

Action:Create
Location: \\mydomainname.edu\folder\location
Reconnect:Checked
Use:"*" (pick any drive letter)
Hide/Show this drive:Show this Drive
Hide/Show all drives:No Change

click Okay
samba must be restarted for GPO to take effect
make sure all the right ports are open on your firewall or mapped drive may not connect, tcp 137, udp 137 etc..

Windows Update GPO

Download ADM files from Microsoft, http://www.microsoft.com/en-us/download/details.aspx?id=18664
Install when asked, navigate to where it installed the ADM files. Usually C:\Program Files(x86)\Microsoft Group Policy\Windows Server...\...
copy only wuau.adm to \\mydomain.edu\sysvol\mydomain.edu\Policies\PolicyDefinitions\
Edit GPO
Go to Computer Configuration => Policies => Administrative Templates => Windows Components => Windows Update
still testing, enable the following

Configure Automatic Updates: Enabled: Auto Download and Schedule Install: Every Day: 17:00
Specify intranet Microsoft update service location: Enabled: http://servername:port, http://servername:port
Automatic Updates Detection Frequency: enabled 12 hours
Allow non administrators to receive update notifications : enabled
Allow Automatic Updates immediate installation: Enabled
No auto-restart with logged on user for scheduled automatic updates installations: Enabled
Reschedule Automatic Updates scheduled installations: Enabled: 10 minutes
Enable clients-de targeting: Enabled or Disabled, can be used to organize wsus better
Allow signed updates from an intranet Microsoft update service location: enabled

SSSD

vim /etc/sssd/sssd.conf
[domain/default]
ldap_tls_reqcert = allow
ldap_id_use_start_tls = True
cache_credentials = True
ldap_search_base = dc=domain,dc=edu
krb5_realm = $REALM
id_provider = ldap
auth_provider = ldap
chpass_provider = ldap
ldap_uri = ldap://domain.edu
ldap_tls_cacertdir = /etc/openldap/cacerts
ldap_schema = rfc2307bis
ldap_user_fullname = displayName
ldap_user_search_base = ou=idmap,dc=domain,dc=edu
ldap_group_search_base = ou=Group,dc=domain,dc=edu
ldap_group_member = member
ldap_group_nesting_level = 4
ldap_tls_cacert = /etc/openldap/cacerts/cacert.pem
ldap_tls_reqcert = demand
ldap_default_bind_dn = cn=Manager,dc=domain,dc=edu
ldap_default_authtok_type = password
ldap_default_authtok = ******
debug_level = 8
[sssd]
services = nss, pam
config_file_version = 2
domains = default
[nss]

[pam]

ACL

set privileges

net rpc rights grant 'Domain\Domain Admins' SeDiskOperatorPrivilege -Uadministrator

view privileges

net rpc rights list accounts -Uadministrator

setfacl -m "g:groupname:permissions" folder

https://wiki.archlinux.org/index.php/Access_Control_Lists
get and set acls

getfacl x | setfacl -R –setfile = -y

Misc

after a yum update portreserve may have been updated and interferes with samba
holds a lock on port 636 for slapd, samba provides an ldap service on 636 so slapd cannot hold it
go to /etc/portreserve and remove the slapd file, restart server, portreserve will not hold lock in 636 anymore and samba can use it

cd /etc/portreserve
rm slapd

deleting regedit user profile

http://social.technet.microsoft.com/wiki/contents/articles/13895.how-to-remove-a-corrupted-user-profile-from-the-registry.aspx

Network level Authentication GPO

http://trekker.net/archives/group-policy-quick-tip-enable-remote-desktop-network-level-authentication/

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