How-To: Hide specific attribute in OX

This article describes how to hide a specific user attribute in OX via LDAP ACL. In this example we hide the attribute employeeNumber so it won’t show in the OX address book. Further information regarding the OX-Connector can be found in the manual.

1. Open the shell of the OX-Connector on the DC it’s installed on

univention-app shell ox-connector

2. Display the OX Container DN

grep 'ldap/hostdn' /etc/univention/base.conf

3. Exit the OX Connector Shell

Ctrl + D

4. Create the ACL template file on Primary DC

vim /usr/local/share/66ox_employee_number.acl

with the following content:

# block access to the employeeNumber for OX-Connector
access to attrs=employeeNumber
    by dn.base="cn=ox-co-73051129,cn=memberserver,cn=computers,dc=tierheim,dc=intranet" none
    by * none break

Check that you put the correct DN from step 2 in here!

5. Install the ACL

. /usr/share/univention-lib/
ucs_registerLDAPExtension \
    --packagename ox_employee_number \
    --packageversion 1.0 \
    --acl /usr/local/share/66ox_employee_number.acl

6. Resync the OX-Connector (on the DC it’s installed on) to apply the change to existing OX objects.

For new objects/users, this step is not necessary. Most of the time though, there are existing users who need to be resynced for this change to apply.

CAUTION: A resync could overwrite data to some default and can take a very long time and block the LDAP replication in the meantime.

univention-directory-listener-ctrl resync ox-connector

7. Monitor the status of the OX-Connector

tail -f /var/log/univention/listener_modules/ox-connector.log

8. When the resync has finished, no object should have the attribute employeeNumber replicated to OX, which is what we want to hide this attribute in the address book.

Revert and deactivate the ACL

If you wish to deactivate the ACLs, run the following on the DC master:

. /usr/share/univention-lib/
ucs_unregisterLDAPExtension --acl 66ox_employee_number
ucr commit /etc/ldap/slapd.conf
service slapd restart
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