Debian 9 Stretch
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LDAP over TLS
2017/06/25
 
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/libnss-ldap.conf
# line 291: uncomment

ssl start_tls
root@www:~#
vi /etc/pam_ldap.conf
# line 258: uncomment

ssl start_tls
root@www:~#
reboot

logout
Debian GNU/Linux 9 www.srv.world ttyS0
www login:
debian 

Password:
Last login: Mon Jun 26 14:27:27 JST 2017 on ttyS0
Linux www.srv.world 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2 (2017-06-12) x86_64

The programs included with the Debian GNU/Linux system are free software;
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individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
debian@www:~$    
# just logined
 
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