Samba 4 Domain Controller Installation on CentOS 7 (2024)

Installation of Samba 4

192.168.1.190 Samba4 AD centos 7

Basis is a CentOS 7 with a minimal install and SELinux disabled.

 [root@samba4 ~]# sestatusSELinux status: disabled[root@samba4 ~]#

Make an entry in the /etc/hosts file.

[root@samba4 ~]# cat /etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.1.190 samba4.sunil.cc samba4[root@samba4 ~]#

Install the epel repo.

[root@samba4 ~]# yum install epel-release -y

Install all the packages needed to compile samba4.

[root@samba4 ~]# yum install perl 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 libxslt docbook-style-xsl openldap-devel pam-devel bzip2 vim wget -y

Now download samba4 package . I use samba-4.6.0 which is latest during this setup.

[root@samba4 ~]# wget https://download.samba.org/pub/samba/stable/samba-4.6.0.tar.gz

Now lets install samba4.

 [root@samba4 ~]# tar -zxvf samba-4.6.0.tar.gz [root@samba4 ~]# cd samba-4.6.0 [root@samba4 samba-4.6.0]# ./configure --enable-debug --enable-selftest --with-ads --with-systemd --with-winbind [root@samba4 samba-4.6.0]# make && make install

The installation will take about 10 minutes depending on the system speed.

Now we will do the domain provisioning.

[root@samba4 samba]# samba-tool domain provision --use-rfc2307 --interactiveRealm [SUNIL.CC]: Domain [SUNIL]: Server Role (dc, member, standalone) [dc]: dc DNS backend (SAMBA_INTERNAL, BIND9_FLATFILE, BIND9_DLZ, NONE) [SAMBA_INTERNAL]: DNS forwarder IP address (write 'none' to disable forwarding) [4.2.2.1]:Administrator password:Retype password:Looking up IPv4 addressesLooking up IPv6 addressesNo IPv6 address will be assignedSetting up share.ldbSetting up secrets.ldbSetting up the registrySetting up the privileges databaseSetting up idmap dbSetting up SAM dbSetting up sam.ldb partitions and settingsSetting up sam.ldb rootDSEPre-loading the Samba 4 and AD schemaAdding DomainDN: DC=sunil,DC=ccAdding configuration containerSetting up sam.ldb schemaSetting up sam.ldb configuration dataSetting up display specifiersModifying display specifiersAdding users containerModifying users containerAdding computers containerModifying computers containerSetting up sam.ldb dataSetting up well known security principalsSetting up sam.ldb users and groupsERROR(ldb): uncaught exception - operations error at ../source4/dsdb/samdb/ldb_modules/password_hash.c:2820 File "/usr/local/samba/lib64/python2.7/site-packages/samba/netcmd/__init__.py", line 176, in _run return self.run(*args, **kwargs) File "/usr/local/samba/lib64/python2.7/site-packages/samba/netcmd/domain.py", line 471, in run nosync=ldap_backend_nosync, ldap_dryrun_mode=ldap_dryrun_mode) File "/usr/local/samba/lib64/python2.7/site-packages/samba/provision/__init__.py", line 2175, in provision skip_sysvolacl=skip_sysvolacl) File "/usr/local/samba/lib64/python2.7/site-packages/samba/provision/__init__.py", line 1787, in provision_fill next_rid=next_rid, dc_rid=dc_rid) File "/usr/local/samba/lib64/python2.7/site-packages/samba/provision/__init__.py", line 1447, in fill_samdb "KRBTGTPASS_B64": b64encode(krbtgtpass.encode('utf-16-le')) File "/usr/local/samba/lib64/python2.7/site-packages/samba/provision/common.py", line 55, in setup_add_ldif ldb.add_ldif(data, controls) File "/usr/local/samba/lib64/python2.7/site-packages/samba/__init__.py", line 225, in add_ldif self.add(msg, controls)[root@samba4 samba]#

There will be some errors when we do the provisioning of domain.

To fix them, please comment out the below line in /etc/krb5.conf.

 -------- #includedir /etc/krb5.conf.d/ --------

Run the domain provisioning again and now the domain will get created without errors.

 [root@samba4 etc]# samba-tool domain provision --use-rfc2307 --interactiveRealm [SUNIL.CC]: Domain [SUNIL]: Server Role (dc, member, standalone) [dc]: DNS backend (SAMBA_INTERNAL, BIND9_FLATFILE, BIND9_DLZ, NONE) [SAMBA_INTERNAL]: DNS forwarder IP address (write 'none' to disable forwarding) [4.2.2.1]:Administrator password:Retype password:Looking up IPv4 addressesLooking up IPv6 addressesNo IPv6 address will be assignedSetting up secrets.ldbSetting up the registrySetting up the privileges databaseSetting up idmap dbSetting up SAM dbSetting up sam.ldb partitions and settingsSetting up sam.ldb rootDSEPre-loading the Samba 4 and AD schemaAdding DomainDN: DC=sunil,DC=ccAdding configuration containerSetting up sam.ldb schemaSetting up sam.ldb configuration dataSetting up display specifiersModifying display specifiersAdding users containerModifying users containerAdding computers containerModifying computers containerSetting up sam.ldb dataSetting up well known security principalsSetting up sam.ldb users and groupsSetting up self joinAdding DNS accountsCreating CN=MicrosoftDNS,CN=System,DC=sunil,DC=ccCreating DomainDnsZones and ForestDnsZones partitionsPopulating DomainDnsZones and ForestDnsZones partitionsSetting up sam.ldb rootDSE marking as synchronizedFixing provision GUIDsA Kerberos configuration suitable for Samba AD has been generated at /usr/local/samba/private/krb5.confSetting up fake yp server settingsOnce the above files are installed, your Samba4 server will be ready to useServer Role: active directory domain controllerHostname: samba4NetBIOS Domain: SUNILDNS Domain: sunil.ccDOMAIN SID: S-1-5-21-2936486394-2075362935-551615353[root@samba4 etc]#

Make sure the ports are open in the firewall.

[root@samba4 etc]#firewall-cmd --add-port=53/tcp --permanent;firewall-cmd --add-port=53/udp --permanent;firewall-cmd --add-port=88/tcp --permanent;firewall-cmd --add-port=88/udp --permanent; \firewall-cmd --add-port=135/tcp --permanent;firewall-cmd --add-port=137-138/udp --permanent;firewall-cmd --add-port=139/tcp --permanent; \firewall-cmd --add-port=389/tcp --permanent;firewall-cmd --add-port=389/udp --permanent;firewall-cmd --add-port=445/tcp --permanent; \firewall-cmd --add-port=464/tcp --permanent;firewall-cmd --add-port=464/udp --permanent;firewall-cmd --add-port=636/tcp --permanent; \firewall-cmd --add-port=1024-5000/tcp --permanent;firewall-cmd --add-port=3268-3269/tcp --permanent[root@samba4 ~]# firewall-cmd --reload

Create a startup script to autostart the service during reboot.

[root@samba4 ~]# cat /etc/systemd/system/samba.service[Unit]Description= Samba 4 Active DirectoryAfter=syslog.targetAfter=network.target[Service]Type=forkingPIDFile=/usr/local/samba/var/run/samba.pidExecStart=/usr/local/samba/sbin/samba[Install]WantedBy=multi-user.target[root@samba4 ~]#[root@samba4 ~]# systemctl enable sambaCreated symlink from /etc/systemd/system/multi-user.target.wants/samba.service to /etc/systemd/system/samba.service.[root@samba4 ~]# systemctl start samba

Adding the Windows host to the domain

192.168.1.191 remote management win 10

Make sure the host is added with a static ipaddress.

Adding the host to the domain.

To manage Samba4 from Windows, we need to have the Microsoft Remote Server Tools (RSAT) installed.

The wiki page has the linkshttps://wiki.samba.org/index.php/Installing_RSAT

Run the installer.

Client authentication with Samba 4 on CentOS 7

192.168.1.22 - client Authentication on CentOS 7

Installation of packages:

[root@centos7 ~]# yum -y install realmd sssd oddjob oddjob-mkhomedir adcli samba-common

Check connectivity with samba4:

 [root@centos7 ~]# realm discover SUNIL.CCsunil.cc type: kerberos realm-name: SUNIL.CC domain-name: sunil.cc configured: kerberos-member server-software: active-directory client-software: sssd required-package: oddjob required-package: oddjob-mkhomedir required-package: sssd required-package: adcli required-package: samba-common-tools login-formats: %U login-policy: allow-realm-logins[root@centos7 ~]#

Joining the domain.

[root@centos7 ~]# realm join SUNIL.CCPassword for Administrator:[root@centos7 ~]#

Check whether we are able to get the user from samba4.

[root@centos7 ~]# id SUNIL\\testuseruid=1570001104([emailprotected]) gid=1570000513(domain [emailprotected]) groups=1570000513(domain [emailprotected])[root@centos7 ~]#

Configure sssd.

[root@centos7 ~]# cat /etc/sssd/sssd.conf[sssd]domains = sunil.ccconfig_file_version = 2services = nss, pam[domain/sunil.cc]ad_domain = sunil.cckrb5_realm = SUNIL.CCrealmd_tags = manages-system joined-with-sambacache_credentials = Trueid_provider = adkrb5_store_password_if_offline = Truedefault_shell = /bin/bashldap_id_mapping = Trueuse_fully_qualified_names = Truefallback_homedir = /home/%u@%daccess_provider = ad[root@centos7 ~]#

Restart sssd.

[root@centos7 ~]# systemctl restart sssd[root@centos7 ~]# systemctl enable sssd

Check the user.

[root@centos7 ~]# id [emailprotected]uid=1570001105([emailprotected]) gid=1570000513(domain [emailprotected]) groups=1570000513(domain [emailprotected]),1570000512(domain [emailprotected]),1570000572(denied rodc password replication [emailprotected])[root@centos7 ~]#

To get the user without domain name.

[root@centos7 ~]# vim /etc/sssd/sssd.conf-----------------------use_fully_qualified_names = False----------------------

Restart sssd and check id command.

[root@centos7 ~]# systemctl restart sssd[root@centos7 ~]# id sambauseruid=1570001105(sambauser) gid=1570000513(domain users) groups=1570000513(domain users),1570000512(domain admins),1570000572(denied rodc password replication group)[root@centos7 ~]#

Client authentication with Samba 4 on CentOS 6

192.168.1.192 - client Authentication on CentOS 6.

Installation of packages.

 [root@centos6 db]# yum install pam pam_ldap pam_krb5 sssd sssd-ldap sssd-common authconfig oddjob oddjob-mkhomedir openldap openldap-clients krb5-workstation adcli -y

Change the kerberos config file.

 [root@centos6 db]# cat /etc/krb5.conf[logging] default = FILE:/var/log/krb5libs.log kdc = FILE:/var/log/krb5kdc.log admin_server = FILE:/var/log/kadmind.log[libdefaults] default_realm = SUNIL.CC dns_lookup_realm = false dns_lookup_kdc = false ticket_lifetime = 24h renew_lifetime = 7d forwardable = true[realms] SUNIL.CC = { kdc = samba4.sunil.cc admin_server = samba4.sunil.cc }[domain_realm] .sunil.cc = SUNIL.CC sunil.cc = SUNIL.CC[root@centos6 db]#

We will use adcli command to join the domain.

 [root@centos6 db]# adcli info sunil.cc[domain]domain-name = sunil.ccdomain-short = SUNILdomain-forest = sunil.ccdomain-controller = samba4.sunil.ccdomain-controller-site = Default-First-Site-Namedomain-controller-flags = pdc gc ldap ds kdc timeserv closest writable good-timeserv full-secretdomain-controller-usable = yesdomain-controllers = samba4.sunil.cc[computer]computer-site = Default-First-Site-Name[root@centos6 db]#[root@centos6 db]# adcli join sunil.ccPassword for [emailprotected]:[root@centos6 db]#

Make sure the kerberos ticket is created.

 [root@centos6 db]# klist -ke

Configure authentication.

 [root@centos6 db]# authconfig --enablesssd --enablesssdauth --enablemkhomedir --update

Modify the sssd config now to do the authentication.

 [root@centos6 db]# cat /etc/sssd/sssd.conf[sssd]services = nss, pam, ssh, autofsconfig_file_version = 2domains = sunil.cc[domain/sunil.cc]id_provider = ad# Uncomment if service discovery is not working# ad_server = server.win.example.comdefault_shell = /bin/bashfallback_homedir = /home/%u[root@centos6 db]#

Restart sssd service.

 [root@centos6 db]# chkconfig sssd on[root@centos6 db]# service sssd restartStopping sssd: [ OK ]Starting sssd: [ OK ][root@centos6 db]#

Validating user.

 [root@centos6 db]# id sambauseruid=1570001105(sambauser) gid=1570000513(domain users) groups=1570000513(domain users),1570000512(domain admins),1570000572(denied rodc password replication group)[root@centos6 db]#

Samba 4 Domain Controller Installation on CentOS 7 (2024)

On this page

Installation of Samba 4

Adding the Windows host to the domain

Client authentication with Samba 4 on CentOS 7

Client authentication with Samba 4 on CentOS 6