FreePBX LDAP Directory

A simple LDAP server to serve a searchable address book of internal extensions from the FreePBX DB

How it works

It starts the LDAP service on port 10389 and responds to directory search requests by translating them into a SQL query against the "asterisk.users" table in MySQL.

Since we aren't working with sensitive information or trying to implement authentication, but most phones require a bind request with a username & password before they'll search, it'll respond as success to any bind request without checking credentials.

This means the address list will always be up-to-date, as there is no import/export.

Two fields are returned for each result, "displayName" and "telephoneNumber".

MySQL to LDAP mapping is:

• "name" in MySQL maps to "displayName" in LDAP
• "extension" in MySQL maps to "telephoneNumber" in LDAP

Build & Usage

To build, you will need the Go runtime and to build you just need to run:

go build

Recommended Install Procedure

# mkdir -p /opt/freepbx-ldap
# cp <freepbx-ldap binary location> /opt/freepbx-ldap/freepbx-ldap
# chown -R asterisk:asterisk /opt/freepbx-ldap
# chmod +x /opt/freepbx-ldap/freepbx-ldap
# cp <systemd/freepbx-ldap.service location> /etc/systemd/system/freepbx-ldap.service
# systemctl daemon-reload
# systemctl enable freepbx-ldap
# systemctl start freepbx-ldap

Phone Configuration

You'll need to configure your IP phones to look up against the LDAP server.

See examples below:

Snom720 - snom720-main.htm

<?xml version="1.0" encoding="utf-8"?>
<settings>
        <phone-settings>
                *** Other Settings ***

                <ldap_server perm="">***server_ip***</ldap_server>
                <ldap_port perm="">10389</ldap_port>
                <ldap_base perm="">dc=asterisk</ldap_base>
                <ldap_username perm="">asterisk</ldap_username>
                <ldap_max_hits perm="">100</ldap_max_hits>
                <ldap_search_filter perm="">(&(telephoneNumber=*)(displayName=%))</ldap_search_filter>
                <ldap_number_filter perm="">(&(telephoneNumber=%)(displayName=*))</ldap_number_filter>
                <ldap_name_attributes perm="">displayName</ldap_name_attributes>
                <ldap_number_attributes perm="">telephoneNumber</ldap_number_attributes>
                <ldap_display_name perm="">%displayName</ldap_display_name>

                <gui_fkey1 perm="">keyevent F_DIRECTORY_SEARCH</gui_fkey1>
        </phone-settings>
</settings>

Snom300 - snom300-main.htm

<?xml version="1.0" encoding="utf-8"?>
<settings>
        <phone-settings>
                *** Other Settings ***

                <ldap_server perm="">***server_ip***</ldap_server>
                <ldap_port perm="">10389</ldap_port>
                <ldap_base perm="">dc=asterisk</ldap_base>
                <ldap_username perm="">asterisk</ldap_username>
                <ldap_max_hits perm="">25</ldap_max_hits>
                <ldap_search_filter perm="">(&(telephoneNumber=*)(displayName=%))</ldap_search_filter>
                <ldap_number_filter perm="">(&(telephoneNumber=%)(displayName=*))</ldap_number_filter>
                <ldap_name_attributes perm="">displayName</ldap_name_attributes>
                <ldap_number_attributes perm="">telephoneNumber</ldap_number_attributes>
                <ldap_display_name perm="">%displayName</ldap_display_name>

                <idle_cancel_key_action perm="">keyevent F_DIRECTORY_SEARCH</idle_cancel_key_action>
        </phone-settings>
        <functionKeys e="2">
                <fkey idx="3" context="active" label="" perm="">keyevent F_DIRECTORY_SEARCH</fkey>
        </functionKeys>
</settings>

Polycom SoundPoint IP - sip.cfg (must be firmware UC 4+)

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<localcfg>
  *** Other Settings ***

  <dir>
      <dir.corp
          dir.corp.address="ldap://***server_ip***"
          dir.corp.port="10389"
          dir.corp.transport="TCP"
          dir.corp.baseDN="dc=asterisk"
          dir.corp.scope="sub"
          dir.corp.filterPrefix=""
          dir.corp.user="uid=asterisk,dc=asterisk"
          dir.corp.pageSize="32"
          dir.corp.password="supersecret"
          dir.corp.cacheSize="128"
          dir.corp.leg.pageSize="8"
          dir.corp.leg.cacheSize="32"
          dir.corp.autoQuerySubmitTimeout="1"
          dir.corp.viewPersistence="0"
          dir.corp.leg.viewPersistence="0"
          dir.corp.sortControl="0">
          <dir.corp.attribute
              dir.corp.attribute.1.name="displayName"
              dir.corp.attribute.1.label="Display Name"
              dir.corp.attribute.1.type="first_name"
              dir.corp.attribute.1.searchable="1"
              dir.corp.attribute.1.filter=""
              dir.corp.attribute.1.sticky="0"
              dir.corp.attribute.2.name="telephoneNumber"
              dir.corp.attribute.2.label="phone number"
              dir.corp.attribute.2.type="phone_number"
              dir.corp.attribute.2.filter=""
              dir.corp.attribute.2.sticky="0"
              dir.corp.attribute.2.searchable="1">
          </dir.corp.attribute>
          <dir.corp.backGroundSync
              dir.corp.backGroundSync.period="3600">
          </dir.corp.backGroundSync>
          <dir.corp.vlv
              dir.corp.vlv.allow="1"
              dir.corp.vlv.sortOrder="displayName telephoneNumber">
          </dir.corp.vlv>
      </dir.corp>
  </dir>

  <feature feature.corporateDirectory.enabled="1"/>
  <softkey softkey.feature.directories="1"/>
</localcfg>