OpenLDAP : LDAP over SSL/TLS2019/07/26

	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"

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

root@www:~#

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

root@www:~#

vi /etc/pam_ldap.conf

# line 258: uncomment

ssl start_tls

root@www:~#

vi /etc/libnss-ldap.conf

# line 291: uncomment

ssl start_tls

root@www:~#

reboot

logout

www login: buster     # LDAP user
Password:
Last login: Fri Jul 26 14:07:43 JST 2019 on ttyS0
Linux www.srv.world 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5 (2019-06-19) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

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

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