{"id":6069,"date":"2021-01-29T16:01:44","date_gmt":"2021-01-29T10:31:44","guid":{"rendered":"https:\/\/www.skynats.com\/?p=6069"},"modified":"2021-08-03T15:10:34","modified_gmt":"2021-08-03T09:40:34","slug":"install-and-configure-open-ldap-server-on-ubuntu-20-04","status":"publish","type":"post","link":"https:\/\/www.skynats.com\/blog\/install-and-configure-open-ldap-server-on-ubuntu-20-04\/","title":{"rendered":"How to install and configure open LDAP server on Ubuntu 20.04"},"content":{"rendered":"\n

From this blog post, we get an apparent view regarding the installation and setup of open LDAP server on ubuntu 20.04. The OpenLDAP is an open-source of the lightweight directory access protocol(LDAP) which was developed by the OpenLDAP project and was released under LDAP public License. <\/p>\n\n\n\n

The OpenLDAP includes:<\/strong><\/p>\n\n\n\n

SLAP – stand-alone LDAP daemon(server)<\/p>\n\n\n\n

Libraries implementing the LDAP protocol<\/p>\n\n\n\n

Utilities, tools, and sample clients.<\/p>\n\n\n\n

 Update\/ upgrade the system:<\/strong><\/p>\n\n\n\n

First, you need to ensure the upgrade of your cache server. To update and upgrade Ubuntu, you need to log into the server and run the following commands.<\/p>\n\n\n\n

apt update \napt upgrade \n<\/code><\/pre>\n\n\n\n
once you have upgraded the cache server, then reboot the server if necessary and get ready to install and configure the OpenLDAP. <\/p>\n\n\n\n
Installing Open LDAP on Ubuntu20.04.<\/strong><\/p>\n\n\n\n
Run the following commands to install open LDAP on Ubuntu20.04.<\/p>\n\n\n\n
apt install slapd ldap-utils<\/p>\n\n\n\n
During the installation, you will be promoted to set the OpenLDAP administrative password.<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
Set the password and then press <ok> button.<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
Confirm the password and continue with the installation and select the <ok> button.<\/p>\n\n\n\n
You can confirm the installation was successful by using the commands lapcat to output SLAPD database contents.<\/p>\n\n\n\n
# slapcat\ndn: dc=example,dc=com\nobjectClass: top\nobjectClass: dcObject\nobjectClass: organization\no: example.com\ndc: example\nstructuralObjectClass: organization\nentryUUID: e33fc814-e5b9-1038-8243-39a2e6b74e62\ncreatorsName: cn=admin,dc=example,dc=com\ncreateTimestamp: 20190328152831Z\nentryCSN: 20190328152831.511390Z#000000#000#000000\nmodifiersName: cn=admin,dc=example,dc=com\nmodifyTimestamp: 20190328152831Z\n<\/code><\/pre>\n\n\n\n
dn: cn=admin,dc=example,dc=com\nobjectClass: simpleSecurityObject\nobjectClass: organizationalRole\ncn: admin\ndescription: LDAP administrator\nuserPassword:: e1NTSEF9WDIzUEJxbXgycUU3M1dRUmppTVYrZE91U0RNMWswSHE=\nstructuralObjectClass: organizationalRole\nentryUUID: e340fedc-e5b9-1038-8244-39a2e6b74e62\ncreatorsName: cn=admin,dc=example,dc=com\ncreateTimestamp: 20190328152831Z\nentryCSN: 20190328152831.519463Z#000000#000#000000\nmodifiersName: cn=admin,dc=example,dc=com\nmodifyTimestamp: 20190328152831Z\n<\/code><\/pre>\n\n\n\n
Step 2:<\/strong> Adding the base dn for the users and groups.<\/p>\n\n\n\n
Next is adding a base DN for users and groups. Create filename <\/p>\n\n\n\n
basedn. ldif with below contents.<\/p>\n\n\n\n
$ vim basedn.ldif\ndn: ou=people,dc=example,dc=com\nobjectClass: organizationalUnit\nou: people\n\ndn: ou=groups,dc=example,dc=com\nobjectClass: organizationalUnit\nou: groups\n\n<\/code><\/pre>\n\n\n\n
Replace the example and com<\/strong> according to your domain components.<\/p>\n\n\n\n
Now add the file by running the commands.<\/p>\n\n\n\n
$ ldapadd -x -D cn=admin,dc=example,dc=com -W -f basedn.ldif\nEnter LDAP Password:\nadding new entry \"ou=people,dc=example,dc=com\"\nadding new entry \"ou=groups,dc=example,dc=com\"\n<\/code><\/pre>\n\n\n\n
Step 3: Adding the user accounts and the groups.<\/p>\n\n\n\n
Enter the password for the user account and confirm it.<\/p>\n\n\n\n
$ slappasswd\nNew password: \nRe-enter new password: \n{SSHA}Zn4\/E5f+Ork7WZF\/alrpMuHHGufC3x0k\n<\/code><\/pre>\n\n\n\n
Create Idif file for adding users.<\/p>\n\n\n\n
$ vim ldapusers.ldif\ndn: uid=Skynats technologies,ou=people,dc=example,dc=com\nobjectClass: inetOrgPerson\nobjectClass: posixAccount\nobjectClass: shadowAccount\ncn: Skynats technologies\n<\/code><\/pre>\n\n\n\n
sn: Wiz\nuserPassword: {SSHA}Zn4\/E5f+Ork7WZF\/alrpMuHHGufC3x0k\nloginShell: \/bin\/bash\nuidNumber: 2000\ngidNumber: 2000\nhomeDirectory: \/home\/Skynats technologies\n<\/code><\/pre>\n\n\n\n
Replace Skynats technologies with the username to add.<\/p>\n\n\n\n
dc=example,dc=com with your correct domain.<\/p>\n\n\n\n
cs and the sn with the username values.<\/p>\n\n\n\n
{SSHA}Zn4\/E5f+Ork7WZF\/alrpMuHHGufc3xOK with your hashed password.<\/p>\n\n\n\n
Once you are done with editing, add the account by running.<\/p>\n\n\n\n
$ ldapadd -x -D cn=admin,dc=example,dc=com -W -f ldapusers.ldif \nEnter LDAP Password: \nadding new entry \"uid=Skynats technologies,ou=people,dc=example,dc=com\"\n<\/code><\/pre>\n\n\n\n
Do the same for the group. Create Idif file.<\/p>\n\n\n\n
$ vim ldapgroups.ldif\ndn: cn=Skynats technologies,ou=groups,dc=example,dc=com\nobjectClass: posixGroup\ncn: Skynats technologies\ngidNumber: 2000\nmemberUid: \n<\/code><\/pre>\n\n\n\n
Add group:<\/strong><\/p>\n\n\n\n
$ ldapadd -x -D cn=admin,dc=example,dc=com -W -f ldapgroups.ldif\nEnter LDAP Password: \n adding new entry \"cn=Skynats technologies,ou=groups,dc=example,dc=com\"\n<\/code><\/pre>\n\n\n\n
You can combine the two file into a single file.<\/p>\n\n\n\n
Step 4 : Install LDAP account manager.<\/strong><\/p>\n\n\n\n
I recommend using the LDAP account manager because the phpLDAPadmin doesn’t work well with PHP 7.2+.so follow the instructions to install and configure LDAP account manager.<\/p>\n\n\n\n
Install and configure the LDAP account manager on Ubuntu.<\/strong><\/p>\n\n\n\n
Step 1: <\/strong>Install the OpenLDAP server.<\/p>\n\n\n\n
First, you have to install and run the LDAP server.<\/p>\n\n\n\n
Step 2: <\/strong>Install Apache Webserver & PHP.<\/p>\n\n\n\n
You can install the PHP and Apache server by running the commands below.  <\/p>\n\n\n\n
sudo apt -y install apache2 php php-cgi libapache2-mod-php php-mbstring php-common php-pear<\/p>\n\n\n\n
Enable the php-Cgi PHP extensions.<\/p>\n\n\n\n
Ubuntu 20.04<\/strong><\/p>\n\n\n\n
sudo a2enconf php7.4-cgi\nsudo systemctl reload apache2<\/code><\/pre>\n\n\n\n
Step 5: Configure LDAP Client on Ubuntu 20.04.<\/strong><\/p>\n\n\n\n
If you don’t have an active DNS server in the network try to add the LDAP server address to the \/etc\/hosts file. <\/p>\n\n\n\n
$ sudo vim \/etc\/hosts<\/p>\n\n\n\n
192.168.18.50 ldap.example.com<\/p>\n\n\n\n
Install LDAP Client on your ubuntu system:<\/strong><\/p>\n\n\n\n
sudo apt -y install libnss-ldap libpam-ldap ldap-utils<\/p>\n\n\n\n
Steps to configuring the settings below.<\/p>\n\n\n\n
  1. Set LDAP URI -It can be either the IP address or the hostname.<\/li><\/ol>\n\n\n\n
    \"\"<\/figure>\n\n\n\n\n\n
    2. Next is the distinguished name of the search base.<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    3. Then, select the LDAP versions 3.<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    4. Click <yes> button to Make local root Database admin.<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    5. Later, choose <No> for Does the LDAP database requires login.<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    6. Set LDAP account for root, something like   cn=admin,cd=example,cn=com<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    7. Provide the LDAP ROOT account password.<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    Once you are done with the installation, edit \/etc\/nsswitch.conf and add ldap authentication.<\/p>\n\n\n\n
    passwd: compat systemd ldap<\/p>\n\n\n\n
    group: compat systemd ldap<\/p>\n\n\n\n
    shadow: compat<\/p>\n\n\n\n
    Try to create the home directory on the first login by adding the following line to the file \/etc\/pam.d\/common-session<\/p>\n\n\n\n
    session optional pam_mkhomedir.so skel=\/etc\/skel umask=077<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    That’s all before that test the LDAP by switching it into the user account.<\/p>\n\n\n\n
    root@server1:~# su – jmutai<\/strong><\/p>\n\n\n\n
    Creating directory ‘\/home\/jmutai’.<\/p>\n\n\n\n
    jmutai@server1:~$ id<\/strong><\/p>\n\n\n\n
    uid=10000(jmutai) gid=10000(sysadmins) groups=10000(sysadmins)<\/p>\n\n\n\n
    Securing LDAP server with SSL\/TLS on ubuntu.<\/strong><\/p>\n\n\n\n
    The following guideline will help in explaining the use of self-signed certificates. <\/p>\n\n\n\n
     Step 1: generate self-signed SSL.<\/p>\n\n\n\n
    First, login into the LDAP server and generate the SSL certificate.<\/p>\n\n\n\n
    # cd \/etc\/ssl\/private \n# openssl genrsa -aes128 -out ldap_server.key 4096 \n\nGenerating RSA private key, 4096 bit long modulus\n \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026..++\n \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.++\n e is 65537 (0x010001)\n Enter pass phrase for ldap_server.key: <Set passphrase>\n Verifying - Enter pass phrase for ldap_server.key: <Confirm passphrase>\n<\/code><\/pre>\n\n\n\n
    Remove the passphrase from the generating RSA private key.<\/strong><\/p>\n\n\n\n
    # openssl rsa -in ldap_server.key -out ldap_server.key<\/strong><\/p>\n\n\n\n
    Enter pass phrase for ldap_server.key: <Enter passphrase><\/strong><\/p>\n\n\n\n
    writing RSA key<\/p>\n\n\n\n
    Generate Csr<\/strong>.<\/p>\n\n\n\n
    # openssl req -new -days 3650 -key ldap_server.key -out ldap_server.csr <\/strong><\/p>\n\n\n\n
    You are about to be asked to enter information that will be incorporated<\/p>\n\n\n\n
    into your certificate request.<\/p>\n\n\n\n
    What you are about to enter is what is called a Distinguished Name or a DN.<\/p>\n\n\n\n
    There are quite a few fields but you can leave some blank<\/p>\n\n\n\n
    For some fields there will be a default value,<\/p>\n\n\n\n
    If you enter ‘.’, the field will be left blank.<\/p>\n\n\n\n
    Country Name (2 letter code) [AU]:KE\nState or Province Name (full name) [Some-State]:Nairobi\nLocality Name (eg, city) []:Nairobi\nOrganization Name (eg, company) [Internet Widgits Pty Ltd]:skynatstechnologies\nOrganizational Unit Name (eg, section) []:skynatstechnologies\nCommon Name (e.g. server FQDN or YOUR name) []:ldap.example.com\nEmail Address []:admin@example.com\nPlease enter the following 'extra' attributes\nto be sent with your certificate request\nA challenge password []:        \nAn optional company name []:\n\n<\/code><\/pre>\n\n\n\n
    Then sign in to your certificate<\/strong>.<\/p>\n\n\n\n
    # openssl x509 -in ldap_server.csr -out ldap_server.crt -req -signkey ldap_server.key -days 3650<\/p>\n\n\n\n
    Signature ok<\/p>\n\n\n\n
    subject=C = KE, ST = Nairobi, L = Nairobi, O = skynatstechnologies, OU = skynatstechnologies, CN = ldap.example.com, emailAddress = admin@example.com<\/code><\/pre>\n\n\n\n
    Getting Private key<\/p>\n\n\n\n
    Step 2: Configure SSL on the LDAP server.<\/strong><\/p>\n\n\n\n
    Copy certificates and a key to \/etc\/ldap\/sasl2\/ directory.<\/p>\n\n\n\n
    sudo cp \/etc\/ssl\/private\/{ldap_server.key,ldap_server.crt} \/etc\/ssl\/certs\/ca-certificates.crt \/etc\/ldap\/sasl2\/<\/p>\n\n\n\n
    Set the ownership certificate to OpenLDAP user.<\/p>\n\n\n\n
    sudo chown -R openldap. \/etc\/ldap\/sasl2<\/code><\/pre>\n\n\n\n
     Creating LDAP configuration file for SSL.<\/p>\n\n\n\n
    # vim ldap_ssl.ldif\ndn: cn=config\nchangetype: modify\nadd: olcTLSCACertificateFile\nolcTLSCACertificateFile: \/etc\/ldap\/sasl2\/ca-certificates.crt\nreplace: olcTLSCertificateFile\nolcTLSCertificateFile: \/etc\/ldap\/sasl2\/ldap_server.crt\nreplace: olcTLSCertificateKeyFile\nolcTLSCertificateKeyFile: \/etc\/ldap\/sasl2\/ldap_server.key\n<\/code><\/pre>\n\n\n\n
    Use the following commands to apply the configuration.<\/p>\n\n\n\n
    # ldapmodify -Y EXTERNAL -H ldapi:\/\/\/ -f ldap_ssl.ldif \nSASL\/EXTERNAL authentication started SASL\nusername: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth\nSASL SSF: 0\nmodifying entry \"cn=config\"\n<\/code><\/pre>\n\n\n\n
    Step 3: Configure LDAP Client<\/strong><\/p>\n\n\n\n
    It will ensure the connection between the client and server is encrypted. Then add the LS_REQCERT allow line to \/etc\/ldap.conf<\/p>\n\n\n\n
    echo \"TLS_REQCERT allow\" | tee \/etc\/ldap\/ldap.conf<\/code><\/pre>\n\n\n\n
    Then configure the OpenLDAP SSL mechanism on below file \/etc\/ldap.conf<\/p>\n\n\n\n
    $ sudo vim \/etc\/ldap.conf<\/code><\/pre>\n\n\n\n
    ssl start_tls<\/code><\/pre>\n\n\n\n
    ssl on<\/code><\/pre>\n\n\n\n
    Now, the SSL certification is connected between the LDAP client and server.<\/p>\n\n\n\n
    suggestion <\/strong><\/p>\n\n\n\n
    Hope this article is helpful and the following guidelines will help you to install and configure the OpenLDAP account manager to administer to your server. further, any assistance or guideline for installation and configuring of the OpenLDAP our Technical team<\/span><\/a><\/strong> will be available 24\/7 for any assistance.<\/p>\n","protected":false},"excerpt":{"rendered":"
    From this blog post, we get an apparent view regarding the installation and setup of open LDAP server on ubuntu 20.04. The OpenLDAP is an open-source of the lightweight directory access protocol(LDAP) which was developed by the OpenLDAP project and was released under LDAP public License.  The OpenLDAP includes: SLAP – stand-alone LDAP daemon(server) Libraries […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,90,213,68,212],"tags":[477,478,214],"class_list":["post-6069","post","type-post","status-publish","format-standard","hentry","category-blog","category-managed-cloud-services","category-open-ldap-server","category-server-management","category-ubuntu-20-04","tag-how-to-install-and-configure-open-ldap-server-on-ubuntu-20-04","tag-install-and-configure-open-ldap-server-on-ubuntu-20-04","tag-ubuntu-20-04"],"yoast_head":"\nHow to install and configure open LDAP server on Ubuntu 20.04<\/title>\n<meta name=\"description\" content=\"The OpenLDAP is an open-source 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