diff --git a/apps/openldap/ldap/mode/systemusage.pm b/apps/openldap/ldap/mode/systemusage.pm
new file mode 100644
index 000000000..42c907829
--- /dev/null
+++ b/apps/openldap/ldap/mode/systemusage.pm
@@ -0,0 +1,270 @@
+#
+# Copyright 2019 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package apps::openldap::ldap::mode::systemusage;
+
+use base qw(centreon::plugins::templates::counter);
+
+use strict;
+use warnings;
+use Digest::MD5 qw(md5_hex);
+use centreon::common::protocols::ldap::lib::ldap;
+
+sub set_counters {
+    my ($self, %options) = @_;
+
+    $self->{maps_counters_type} = [
+        { name => 'global', type => 0, message_separator => ' - ', skipped_code => { -10 => 1 } },
+        { name => 'operation', type => 0, cb_prefix_output => 'prefix_operation_output', skipped_code => { -10 => 1 } },
+    ];
+
+    $self->{maps_counters}->{operation} = [];
+    foreach ('search', 'add', 'bind', 'unbind', 'delete') {
+        push @{$self->{maps_counters}->{operation}}, 
+            { label => 'op-' . $_, nlabel => 'system.operations.' . $_ . '.completed.count', set => {
+                    key_values => [ { name => 'operations_completed_' . $_, diff => 1 } ],
+                    output_template => $_ . ' %s',
+                    perfdatas => [
+                        { label => 'operations_' . $_, value => 'operations_completed_' . $_ . '_absolute', template => '%.2f',
+                           min => 0 },
+                    ],
+                }
+            };
+    }
+    
+    
+    $self->{maps_counters}->{global} = [
+        { label => 'con-current', nlabel => 'system.connections.current.count', set => {
+                key_values => [ { name => 'connections_current' } ],
+                output_template => 'Current connections %s',
+                perfdatas => [
+                    { label => 'connections_current', value => 'connections_current_absolute', template => '%s',
+                      min => 0 },
+                ],
+            }
+        },
+        { label => 'con-total', nlabel => 'system.connections.total.count', set => {
+                key_values => [ { name => 'connections_total', diff => 1 } ],
+                output_template => 'Total connections %s',
+                perfdatas => [
+                    { label => 'connections_total', value => 'connections_total_absolute', template => '%s',
+                      min => 0 },
+                ],
+            }
+        },
+        { label => 'threads-active', nlabel => 'system.threads.active.percentage', set => {
+                key_values => [ { name => 'threads_active_prct' } ],
+                output_template => 'Current active threads %.2f %%',
+                perfdatas => [
+                    { label => 'threads_active', value => 'threads_active_prct_absolute', template => '%.2f',
+                      min => 0, max => 100, unit => '%' },
+                ],
+            }
+        },
+        { label => 'traffic',  nlabel => 'system.traffic.bytespersecond', set => {
+                key_values => [ { name => 'traffic', diff => 1 } ],
+                output_change_bytes => 1, per_second => 1,
+                output_template => 'traffic %s %s/s',
+                perfdatas => [
+                    { label => 'traffic', value => 'traffic_per_second', template => '%s',
+                       min => 0, unit => 'B/s', cast_int => 1 },
+                ],
+            }
+        },
+    ];
+}
+
+sub prefix_operation_output {
+    my ($self, %options) = @_;
+
+    return 'Operation completed ';
+}
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options, statefile => 1, force_new_perfdata => 1);
+    bless $self, $class;
+
+    $self->{version} = '1.0';
+    $options{options}->add_options(arguments => {
+        'hostname:s'               => { name => 'hostname' },
+        'search-base:s'            => { name => 'search_base', default => 'cn=monitor' },
+        'ldap-connect-options:s@'  => { name => 'ldap_connect_options' },
+        'ldap-starttls-options:s@' => { name => 'ldap_starttls_options' },
+        'ldap-bind-options:s@'     => { name => 'ldap_bind_options' },
+        'tls'                      => { name => 'use_tls' },
+        'username:s'   => { name => 'username' },
+        'password:s'   => { name => 'password' },
+        'timeout:s'    => { name => 'timeout', default => '30' },
+    });
+    
+    return $self;
+}
+
+sub check_options {
+    my ($self, %options) = @_;
+    $self->SUPER::check_options(%options);
+
+    if (!defined($self->{option_results}->{hostname})) {
+        $self->{output}->add_option_msg(short_msg => 'Please set the hostname option');
+        $self->{output}->option_exit();
+    }
+    if (defined($self->{option_results}->{username}) && $self->{option_results}->{username} ne '' &&
+        !defined($self->{option_results}->{password})) {
+        $self->{output}->add_option_msg(short_msg => "Please set --password option.");
+        $self->{output}->option_exit();
+    }
+}
+
+sub ldap_error {
+    my ($self, %options) = @_;
+    
+    if ($options{code} == 1) {
+        $self->{output}->output_add(
+            severity => 'unknown',
+            short_msg => $options{err_msg}
+        );
+        $self->{output}->display();
+        $self->{output}->exit();
+    }
+}
+
+sub search_monitor {
+    my ($self, %options) = @_;
+
+    my ($ldap_handle, $code, $err_msg) = centreon::common::protocols::ldap::lib::ldap::connect(
+        hostname => $self->{option_results}->{hostname},
+        username => $self->{option_results}->{username},
+        password => $self->{option_results}->{password},
+        timeout => $self->{option_results}->{timeout},
+        ldap_connect_options => $self->{option_results}->{ldap_connect_options},
+        use_tls => $self->{option_results}->{use_tls},
+        ldap_starttls_options => $self->{option_results}->{ldap_starttls_options},
+        ldap_bind_options => $self->{option_results}->{ldap_bind_options},
+    );
+    $self->ldap_error(code => $code, err_msg => $err_msg);
+    (my $search_result, $code, $err_msg) = centreon::common::protocols::ldap::lib::ldap::search(
+        ldap_handle => $ldap_handle,
+        search_base => $self->{option_results}->{search_base},
+        search_filter => '(objectclass=*)',
+        ldap_search_options => ['attrs=monitoredInfo', 'attrs=monitorCounter', 'attrs=MonitorOpCompleted'],
+    );
+    $self->ldap_error(code => $code, err_msg => $err_msg);
+    centreon::common::protocols::ldap::lib::ldap::quit(ldap_handle => $ldap_handle);
+
+    return $search_result;
+}
+
+sub manage_selection {
+    my ($self, %options) = @_;
+
+    $self->{operation} = {};
+    $self->{global} = {};
+    my $search_result = $self->search_monitor();
+    foreach my $entry ($search_result->entries()) {
+        my $dn = $entry->dn();
+        if ($dn =~ /cn=(Current|Total),cn=Connections/i) {
+            $self->{global}->{'connections_' . lc($1)} = $entry->get_value('monitorCounter');
+        } elsif ($dn =~ /cn=(.*?),cn=Operations/i) {
+            $self->{operation}->{'operations_completed_' . lc($1)} = $entry->get_value('MonitorOpCompleted');
+        } elsif ($dn =~ /cn=(Max|Active),cn=Threads/i) {
+            $self->{global}->{'threads_' . lc($1)} = $entry->get_value('monitoredInfo');
+        } elsif ($dn =~ /cn=Bytes,cn=Statistics/i) {
+            $self->{global}->{traffic} = $entry->get_value('monitorCounter');
+        } 
+    }
+
+    $self->{global}->{threads_active_prct} = $self->{global}->{threads_active} * 100 / $self->{global}->{threads_max};
+
+    $self->{cache_name} = "openldap_" . $self->{mode} . '_' . $self->{option_results}->{hostname} . '_' .
+        (defined($self->{option_results}->{filter_counters}) ? md5_hex($self->{option_results}->{filter_counters}) : md5_hex('all'));
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+Check system usage (connections, threads, requests).
+
+=over 8
+
+=item B<--hostname>
+
+IP Addr/FQDN of the openldap host (required).
+
+=item B<--search-base>
+
+Set the DN that is the base object entry relative to the backend monitor (Default: cn=monitor).
+
+=item B<--ldap-connect-options>
+
+Add custom ldap connect options:
+
+=over 16
+
+=item B<Set SSL connection>
+
+--ldap-connect-options='scheme=ldaps'
+
+=item B<Set LDAP version 2>
+
+--ldap-connect-options='version=2'
+
+=back
+
+=item B<--ldap-starttls-options>
+
+Add custom start tls options (need --tls option):
+
+=over 16
+
+=item B<An example>
+
+--ldap-starttls-options='verify=none'
+
+=back
+
+=item B<--ldap-bind-options>
+
+Add custom bind options (can force noauth) (not really useful now).
+
+=item B<--username>
+
+Specify username for authentification (can be a DN)
+
+=item B<--password>
+
+Specify password for authentification
+
+=item B<--timeout>
+
+Connection timeout in seconds (Default: 30)
+
+=item B<--warning-*> B<--critical-*> 
+
+Thresholds.
+Can be: 'con-current', 'con-total', 'threads-active', 'traffic',
+'op-add', 'op-search', 'op-bind', 'op-unbind', 'op-delete'.
+
+=back
+
+=cut
diff --git a/apps/openldap/ldap/plugin.pm b/apps/openldap/ldap/plugin.pm
new file mode 100644
index 000000000..46cc4cd6f
--- /dev/null
+++ b/apps/openldap/ldap/plugin.pm
@@ -0,0 +1,48 @@
+#
+# Copyright 2019 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package apps::openldap::ldap::plugin;
+
+use strict;
+use warnings;
+use base qw(centreon::plugins::script_simple);
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options);
+    bless $self, $class;
+
+    $self->{version} = '0.1';
+    %{$self->{modes}} = (
+        'system-usage' => 'apps::openldap::ldap::mode::systemusage',
+    );
+
+    return $self;
+}
+
+1;
+
+__END__
+
+=head1 PLUGIN DESCRIPTION
+
+Check OpenLDAP through the monitor backend.
+
+=cut
diff --git a/apps/protocols/ldap/lib/ldap.pm b/apps/protocols/ldap/lib/ldap.pm
deleted file mode 100644
index b68fb5c20..000000000
--- a/apps/protocols/ldap/lib/ldap.pm
+++ /dev/null
@@ -1,132 +0,0 @@
-#
-# Copyright 2019 Centreon (http://www.centreon.com/)
-#
-# Centreon is a full-fledged industry-strength solution that meets
-# the needs in IT infrastructure and application monitoring for
-# service performance.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-package apps::protocols::ldap::lib::ldap;
-
-use strict;
-use warnings;
-use Net::LDAP;
-
-my $ldap_handle;
-my $connected = 0;
-
-sub quit {
-    if ($connected == 1) {
-        $ldap_handle->unbind;
-    }
-}
-
-sub search {
-    my ($self, %options) = @_;
-    my %ldap_search_options = ();
-    
-    $ldap_search_options{base} = $self->{option_results}->{search_base};
-    $ldap_search_options{filter} = $self->{option_results}->{search_filter};
-    my $attrs;
-    foreach my $option (@{$self->{option_results}->{ldap_search_options}}) {
-        next if ($option !~ /^(.+?)=(.+)$/);
-        if ($1 =~ /attrs/) {
-            $attrs = [] if (!defined($attrs));
-            push @$attrs, $2; 
-        } else {
-            $ldap_search_options{$1} = $2;
-        }
-    }
-    $ldap_search_options{attrs} = $attrs if (defined($attrs));
-    my $search_result = $ldap_handle->search(%ldap_search_options);
-    if ($search_result->code) {
-        $self->{output}->output_add(severity => 'UNKNOWN',
-                                    short_msg => 'Search operation error: ' . $search_result->error);
-        $self->{output}->display();
-        $self->{output}->exit();
-    }
-    
-    return $search_result;
-}
-
-sub connect {
-    my ($self, %options) = @_;
-    my %ldap_connect_options = ();
-    my %ldap_bind_options = ();
-    
-    if (defined($self->{option_results}->{username}) && $self->{option_results}->{username} ne '' &&
-        !defined($self->{option_results}->{password})) {
-        $self->{output}->add_option_msg(short_msg => "Please set --password option.");
-        $self->{output}->option_exit();
-    }
-
-    my $connection_exit = defined($options{connection_exit}) ? $options{connection_exit} : 'unknown';
-    $ldap_connect_options{timeout} = $self->{option_results}->{timeout} if (defined($self->{option_results}->{timeout}));
-    foreach my $option (@{$self->{option_results}->{ldap_connect_options}}) {
-        next if ($option !~ /^(.+?)=(.+)$/);
-        $ldap_connect_options{$1} = $2;
-    }
-    
-    $ldap_handle = Net::LDAP->new($self->{option_results}->{hostname}, %ldap_connect_options);
-
-    if (!defined($ldap_handle)) {
-        $self->{output}->output_add(severity => $connection_exit,
-                                    short_msg => 'Unable to connect to LDAP: ' . $@);
-        $self->{output}->display();
-        $self->{output}->exit();
-    }
-    
-    # TLS Process
-    if (defined($self->{option_results}->{use_tls})) {
-        my %ldap_starttls_options = ();
-        
-        foreach my $option (@{$self->{option_results}->{ldap_starttls_options}}) {
-            next if ($option !~ /^(.+?)=(.+)$/);
-            $ldap_starttls_options{$1} = $2;
-        }
-        
-        my $tls_result = $ldap_handle->start_tls(%ldap_starttls_options);
-        if ($tls_result->code) {
-            $self->{output}->output_add(severity => $connection_exit,
-                                        short_msg => 'Start TLS operation error: ' . $tls_result->error);
-            $self->{output}->display();
-            $self->{output}->exit();
-        }
-    }
-    
-    # Bind process
-    my $username;
-    if (defined($self->{option_results}->{username}) && $self->{option_results}->{username} ne '') {
-        $ldap_bind_options{password} = $self->{option_results}->{password};
-        $username = $self->{option_results}->{username};
-    }
-    
-    foreach my $option (@{$self->{option_results}->{ldap_bind_options}}) {
-        next if ($option !~ /^(.+?)=(.+)$/);
-        $ldap_bind_options{$1} = $2;
-    }
-    
-    my $bind_result = $ldap_handle->bind($username, %ldap_bind_options);
-    if ($bind_result->code) {
-        $self->{output}->output_add(severity => $connection_exit,
-                                    short_msg => 'Bind operation error: ' . $bind_result->error);
-        $self->{output}->display();
-        $self->{output}->exit();
-    }
-    
-    $connected = 1;
-}
-
-1;
diff --git a/apps/protocols/ldap/mode/login.pm b/apps/protocols/ldap/mode/login.pm
index 2fb5ec758..74c7d3eff 100644
--- a/apps/protocols/ldap/mode/login.pm
+++ b/apps/protocols/ldap/mode/login.pm
@@ -25,7 +25,7 @@ use base qw(centreon::plugins::mode);
 use strict;
 use warnings;
 use Time::HiRes qw(gettimeofday tv_interval);
-use apps::protocols::ldap::lib::ldap;
+use centreon::common::protocols::ldap::lib::ldap;
 
 sub new {
     my ($class, %options) = @_;
@@ -33,19 +33,19 @@ sub new {
     bless $self, $class;
 
     $self->{version} = '1.0';
-    $options{options}->add_options(arguments =>
-         {
-         "hostname:s"               => { name => 'hostname' },
-         "ldap-connect-options:s@"  => { name => 'ldap_connect_options' },
-         "ldap-starttls-options:s@" => { name => 'ldap_starttls_options' },
-         "ldap-bind-options:s@"     => { name => 'ldap_bind_options' },
-         "tls"                      => { name => 'use_tls' },
-         "username:s"   => { name => 'username' },
-         "password:s"   => { name => 'password' },
-         "warning:s"    => { name => 'warning' },
-         "critical:s"   => { name => 'critical' },
-         "timeout:s"    => { name => 'timeout', default => '30' },
-         });
+    $options{options}->add_options(arguments => {
+        'hostname:s'               => { name => 'hostname' },
+        'ldap-connect-options:s@'  => { name => 'ldap_connect_options' },
+        'ldap-starttls-options:s@' => { name => 'ldap_starttls_options' },
+        'ldap-bind-options:s@'     => { name => 'ldap_bind_options' },
+        'tls'                      => { name => 'use_tls' },
+        'username:s'   => { name => 'username' },
+        'password:s'   => { name => 'password' },
+        'warning:s'    => { name => 'warning' },
+        'critical:s'   => { name => 'critical' },
+        'timeout:s'    => { name => 'timeout', default => '30' },
+    });
+
     return $self;
 }
 
@@ -63,7 +63,13 @@ sub check_options {
     }
 
     if (!defined($self->{option_results}->{hostname})) {
-        $self->{output}->add_option_msg(short_msg => "Please set the hostname option");
+        $self->{output}->add_option_msg(short_msg => 'Please set the hostname option');
+        $self->{output}->option_exit();
+    }
+
+    if (defined($self->{option_results}->{username}) && $self->{option_results}->{username} ne '' &&
+        !defined($self->{option_results}->{password})) {
+        $self->{output}->add_option_msg(short_msg => "Please set --password option.");
         $self->{output}->option_exit();
     }
 }
@@ -73,16 +79,31 @@ sub run {
     
     my $timing0 = [gettimeofday];
     
-    apps::protocols::ldap::lib::ldap::connect($self, connection_exit => 'critical');  
-    apps::protocols::ldap::lib::ldap::quit();
+    my ($ldap_handle, $code, $err_msg) = centreon::common::protocols::ldap::lib::ldap::connect(
+        hostname => $self->{option_results}->{hostname},
+        username => $self->{option_results}->{username},
+        password => $self->{option_results}->{password},
+        timeout => $self->{option_results}->{timeout},
+        ldap_connect_options => $self->{option_results}->{ldap_connect_options},
+        use_tls => $self->{option_results}->{use_tls},
+        ldap_starttls_options => $self->{option_results}->{ldap_starttls_options},
+        ldap_bind_options => $self->{option_results}->{ldap_bind_options},
+    );
+    if ($code == 1) {
+        $self->{output}->output_add(severity => 'critical',
+                                    short_msg => $err_msg);
+        $self->{output}->display();
+        $self->{output}->exit();
+    }
+    centreon::common::protocols::ldap::lib::ldap::quit(ldap_handle => $ldap_handle);
 
     my $timeelapsed = tv_interval ($timing0, [gettimeofday]);
     
     my $exit = $self->{perfdata}->threshold_check(value => $timeelapsed,
                                                   threshold => [ { label => 'critical', 'exit_litteral' => 'critical' }, { label => 'warning', exit_litteral => 'warning' } ]);
     $self->{output}->output_add(severity => $exit,
-                                short_msg => sprintf("Response time %.3f second(s)", $timeelapsed));
-    $self->{output}->perfdata_add(label => "time", unit => 's',
+                                short_msg => sprintf('Response time %.3f second(s)', $timeelapsed));
+    $self->{output}->perfdata_add(label => 'time', unit => 's',
                                   value => sprintf('%.3f', $timeelapsed),
                                   warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning'),
                                   critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical'));
diff --git a/apps/protocols/ldap/mode/search.pm b/apps/protocols/ldap/mode/search.pm
index 9eb2f6860..be09b3428 100644
--- a/apps/protocols/ldap/mode/search.pm
+++ b/apps/protocols/ldap/mode/search.pm
@@ -25,7 +25,7 @@ use base qw(centreon::plugins::mode);
 use strict;
 use warnings;
 use Time::HiRes qw(gettimeofday tv_interval);
-use apps::protocols::ldap::lib::ldap;
+use centreon::common::protocols::ldap::lib::ldap;
 
 sub new {
     my ($class, %options) = @_;
@@ -33,22 +33,22 @@ sub new {
     bless $self, $class;
 
     $self->{version} = '1.0';
-    $options{options}->add_options(arguments =>
-         {
-         "hostname:s"               => { name => 'hostname' },
-         "search-base:s"            => { name => 'search_base' },
-         "search-filter:s"          => { name => 'search_filter' },
-         "ldap-connect-options:s@"  => { name => 'ldap_connect_options' },
-         "ldap-starttls-options:s@" => { name => 'ldap_starttls_options' },
-         "ldap-bind-options:s@"     => { name => 'ldap_bind_options' },
-         "ldap-search-options:s@"   => { name => 'ldap_search_options' },
-         "tls"                      => { name => 'use_tls' },
-         "username:s"   => { name => 'username' },
-         "password:s"   => { name => 'password' },
-         "warning:s"    => { name => 'warning' },
-         "critical:s"   => { name => 'critical' },
-         "timeout:s"    => { name => 'timeout', default => '30' },
-         });
+    $options{options}->add_options(arguments => {
+         'hostname:s'               => { name => 'hostname' },
+         'search-base:s'            => { name => 'search_base' },
+         'search-filter:s'          => { name => 'search_filter' },
+         'ldap-connect-options:s@'  => { name => 'ldap_connect_options' },
+         'ldap-starttls-options:s@' => { name => 'ldap_starttls_options' },
+         'ldap-bind-options:s@'     => { name => 'ldap_bind_options' },
+         'ldap-search-options:s@'   => { name => 'ldap_search_options' },
+         'tls'                      => { name => 'use_tls' },
+         'username:s'   => { name => 'username' },
+         'password:s'   => { name => 'password' },
+         'warning:s'    => { name => 'warning' },
+         'critical:s'   => { name => 'critical' },
+         'timeout:s'    => { name => 'timeout', default => '30' },
+    });
+
     return $self;
 }
 
@@ -66,27 +66,61 @@ sub check_options {
     }
 
     if (!defined($self->{option_results}->{hostname})) {
-        $self->{output}->add_option_msg(short_msg => "Please set the hostname option");
+        $self->{output}->add_option_msg(short_msg => 'Please set the hostname option');
+        $self->{output}->option_exit();
+    }
+    if (defined($self->{option_results}->{username}) && $self->{option_results}->{username} ne '' &&
+        !defined($self->{option_results}->{password})) {
+        $self->{output}->add_option_msg(short_msg => "Please set --password option.");
         $self->{output}->option_exit();
     }
     if (!defined($self->{option_results}->{search_base})) {
-        $self->{output}->add_option_msg(short_msg => "Please set the search-base option");
+        $self->{output}->add_option_msg(short_msg => 'Please set the search-base option');
         $self->{output}->option_exit();
     }
     if (!defined($self->{option_results}->{search_filter})) {
-        $self->{output}->add_option_msg(short_msg => "Please set the search-filter option");
+        $self->{output}->add_option_msg(short_msg => 'Please set the search-filter option');
         $self->{output}->option_exit();
     }
 }
 
+sub ldap_error {
+    my ($self, %options) = @_;
+    
+    if ($options{code} == 1) {
+        $self->{output}->output_add(
+            severity => 'unknown',
+            short_msg => $options{err_msg}
+        );
+        $self->{output}->display();
+        $self->{output}->exit();
+    }
+}
+
 sub run {
     my ($self, %options) = @_;
     
     my $timing0 = [gettimeofday];
     
-    apps::protocols::ldap::lib::ldap::connect($self);
-    my $search_result = apps::protocols::ldap::lib::ldap::search($self);  
-    apps::protocols::ldap::lib::ldap::quit();
+    my ($ldap_handle, $code, $err_msg) = centreon::common::protocols::ldap::lib::ldap::connect(
+        hostname => $self->{option_results}->{hostname},
+        username => $self->{option_results}->{username},
+        password => $self->{option_results}->{password},
+        timeout => $self->{option_results}->{timeout},
+        ldap_connect_options => $self->{option_results}->{ldap_connect_options},
+        use_tls => $self->{option_results}->{use_tls},
+        ldap_starttls_options => $self->{option_results}->{ldap_starttls_options},
+        ldap_bind_options => $self->{option_results}->{ldap_bind_options},
+    );
+    $self->ldap_error(code => $code, err_msg => $err_msg);
+    (my $search_result, $code, $err_msg) = centreon::common::protocols::ldap::lib::ldap::search(
+        ldap_handle => $ldap_handle,
+        search_base => $self->{option_results}->{search_base},
+        search_filter => $self->{option_results}->{search_filter},
+        ldap_search_options => $self->{option_results}->{ldap_search_options},
+    );
+    $self->ldap_error(code => $code, err_msg => $err_msg);
+    centreon::common::protocols::ldap::lib::ldap::quit(ldap_handle => $ldap_handle);
 
     my $timeelapsed = tv_interval ($timing0, [gettimeofday]);
     
@@ -94,12 +128,12 @@ sub run {
     my $exit = $self->{perfdata}->threshold_check(value => $num_entries,
                                                   threshold => [ { label => 'critical', 'exit_litteral' => 'critical' }, { label => 'warning', exit_litteral => 'warning' } ]);
     $self->{output}->output_add(severity => $exit,
-                                short_msg => sprintf("Number of results returned: %s", $num_entries));
+                                short_msg => sprintf('Number of results returned: %s', $num_entries));
                                 
-    $self->{output}->perfdata_add(label => "time", unit => 's',
+    $self->{output}->perfdata_add(label => 'time', unit => 's',
                                   value => sprintf('%.3f', $timeelapsed),
                                   min => 0);
-    $self->{output}->perfdata_add(label => "entries",
+    $self->{output}->perfdata_add(label => 'entries',
                                   value => $num_entries,
                                   warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning'),
                                   critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical'),
diff --git a/centreon/common/protocols/ldap/lib/ldap.pm b/centreon/common/protocols/ldap/lib/ldap.pm
new file mode 100644
index 000000000..3c850b893
--- /dev/null
+++ b/centreon/common/protocols/ldap/lib/ldap.pm
@@ -0,0 +1,112 @@
+#
+# Copyright 2019 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package centreon::common::protocols::ldap::lib::ldap;
+
+use strict;
+use warnings;
+use Net::LDAP;
+
+sub quit {
+    my (%options) = @_;
+
+    if (defined($options{ldap_handle})) {
+        $options{ldap_handle}->unbind();
+    }
+}
+
+sub search {
+    my (%options) = @_;
+    my %ldap_search_options = ();
+    
+    $ldap_search_options{base} = $options{search_base};
+    $ldap_search_options{filter} = $options{search_filter};
+    my $attrs;
+    foreach my $option (@{$options{ldap_search_options}}) {
+        next if ($option !~ /^\s*(.+?)\s*=(.+)$/);
+        if ($1 eq 'attrs') {
+            $attrs = [] if (!defined($attrs));
+            push @$attrs, $2;
+        } else {
+            $ldap_search_options{$1} = $2;
+        }
+    }
+    $ldap_search_options{attrs} = $attrs if (defined($attrs));
+    my $search_result = $options{ldap_handle}->search(%ldap_search_options);
+    if ($search_result->code) {
+        return ($search_result, 1, 'Search operation error: ' . $search_result->error);
+    }
+    
+    return ($search_result, 0);
+}
+
+sub connect {
+    my (%options) = @_;
+    my %ldap_connect_options = ();
+    my %ldap_bind_options = ();
+
+    $ldap_connect_options{timeout} = $options{timeout} if (defined($options{timeout}));
+    foreach my $option (@{$options{ldap_connect_options}}) {
+        next if ($option !~ /^(.+?)=(.+)$/);
+        $ldap_connect_options{$1} = $2;
+    }
+    
+    my $ldap_handle = Net::LDAP->new($options{hostname}, %ldap_connect_options);
+
+    if (!defined($ldap_handle)) {
+        return (undef, 1, 'Unable to connect to LDAP: ' . $@);
+    }
+    
+    # TLS Process
+    if (defined($options{use_tls})) {
+        my %ldap_starttls_options = ();
+        
+        foreach my $option (@{$options{ldap_starttls_options}}) {
+            next if ($option !~ /^(.+?)=(.+)$/);
+            $ldap_starttls_options{$1} = $2;
+        }
+        
+        my $tls_result = $ldap_handle->start_tls(%ldap_starttls_options);
+        if ($tls_result->code) {
+            return ($ldap_handle, 1, 'Start TLS operation error: ' . $tls_result->error);
+        }
+    }
+    
+    # Bind process
+    my $username;
+    if (defined($options{username}) && $options{username} ne '') {
+        $ldap_bind_options{password} = $options{password};
+        $username = $options{username};
+    }
+    
+    foreach my $option (@{$options{ldap_bind_options}}) {
+        next if ($option !~ /^(.+?)=(.+)$/);
+        $ldap_bind_options{$1} = $2;
+    }
+    
+    my $bind_result = $ldap_handle->bind($username, %ldap_bind_options);
+    if ($bind_result->code) {
+        return ($ldap_handle, 1, 'Bind operation error: ' . $bind_result->error);
+    }
+    
+    return ($ldap_handle, 0);
+}
+
+1;