Ubuntu 17.04
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LDAP over TLS2017/04/23
 
Configure LDAP over TLS to make connection be secure.
[1]
Create SSL certificate first. See 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:~#
vi /etc/default/slapd
# line 24: add

SLAPD_SERVICES="ldap:/// ldapi:///
ldaps:///
"
root@dlp:~#
systemctl restart slapd

[3] Configure LDAP Client.
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
Ubuntu 17.04 www.srv.world ttyS0
www login:
debian 

Password:
Last login: Mon Apr 24 09:58:33 JST 2017 on ttyS0
Welcome to Ubuntu 17.04 (GNU/Linux 4.10.0-19-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
debian@www:~$    
# just logined
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