OpenLDAP : LDAP over SSL/TLS2019/04/25

	Configure LDAP over SSL/TLS to make connection be secure.
[1]	On this exmaple, create and use self-signed certificates like here.
[2]	Configure LDAP Server.

root@dlp:~#

cp /etc/ssl/private/server.key \
/etc/ssl/private/server.crt \
/etc/ssl/certs/ca-certificates.crt \
/etc/ldap/sasl2/

root@dlp:~#

chown openldap. /etc/ldap/sasl2/server.key \
/etc/ldap/sasl2/server.crt \
/etc/ldap/sasl2/ca-certificates.crt

root@dlp:~#

vi mod_ssl.ldif

# create new

dn: cn=config
changetype: modify
add: olcTLSCACertificateFile
olcTLSCACertificateFile: /etc/ldap/sasl2/ca-certificates.crt
-
replace: olcTLSCertificateFile
olcTLSCertificateFile: /etc/ldap/sasl2/server.crt
-
replace: olcTLSCertificateKeyFile
olcTLSCertificateKeyFile: /etc/ldap/sasl2/server.key

root@dlp:~#

ldapmodify -Y EXTERNAL -H ldapi:/// -f mod_ssl.ldif

SASL/EXTERNAL authentication started
SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
SASL SSF: 0
modifying entry "cn=config"

root@dlp:~#

systemctl restart slapd

[3]	Configure LDAP Client If you'd like to make sure the connection between LDAP server and client is encrypted, use tcpdump and other network capture software on LDAP server.

root@www:~#

echo "TLS_REQCERT allow" >> /etc/ldap/ldap.conf

root@www:~#

vi /etc/ldap.conf

# line 261: uncomment

ssl start_tls

root@www:~#

exit

logout

www login: disco     # LDAP user
Password:
Last login: Thu Apr 25 14:22:35 JST 2019 on ttyS0
Welcome to Ubuntu 19.04 (GNU/Linux 5.0.0-13-generic x86_64)

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disco@www:~$      # logined

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