diff --git a/.env_web b/.env_web
index e19969155..72efcf1fc 100644
--- a/.env_web
+++ b/.env_web
@@ -9,3 +9,6 @@ ZBX_SERVER_NAME=Composed installation
 # ZBX_MAXINPUTTIME=300
 # Timezone one of: http://php.net/manual/en/timezones.php
 # PHP_TZ=Europe/Riga
+# ZBX_DENY_GUI_ACCESS=false
+# ZBX_GUI_ACCESS_IP_RANGE=['127.0.0.1']
+# ZBX_GUI_WARNING_MSG=Zabbix is under maintenance.
diff --git a/web-apache-mysql/alpine/Dockerfile b/web-apache-mysql/alpine/Dockerfile
index 5f045c0e7..e3f8c6052 100644
--- a/web-apache-mysql/alpine/Dockerfile
+++ b/web-apache-mysql/alpine/Dockerfile
@@ -77,9 +77,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     chown --quiet -R zabbix:root /etc/zabbix/ && \
     chgrp -R 0 /etc/zabbix/  && \
     chmod -R g=u /etc/zabbix/  && \
diff --git a/web-apache-mysql/alpine/conf/etc/zabbix/web/maintenance.inc.php b/web-apache-mysql/alpine/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-apache-mysql/alpine/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-apache-mysql/alpine/docker-entrypoint.sh b/web-apache-mysql/alpine/docker-entrypoint.sh
index 26d2425be..72aba5578 100755
--- a/web-apache-mysql/alpine/docker-entrypoint.sh
+++ b/web-apache-mysql/alpine/docker-entrypoint.sh
@@ -146,6 +146,10 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-apache-mysql/centos/Dockerfile b/web-apache-mysql/centos/Dockerfile
index 53977cc4c..a00f8ec88 100644
--- a/web-apache-mysql/centos/Dockerfile
+++ b/web-apache-mysql/centos/Dockerfile
@@ -66,9 +66,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     cat /usr/share/zabbix/include/locales.inc.php | grep display | grep true | awk '{$1=$1};1' | \
                 cut -d"'" -f 2 | sort | \
                 xargs -I '{}' bash -c 'echo "{}" && localedef -c -i {} -f UTF-8 {}.UTF-8 2>/dev/null' && \
diff --git a/web-apache-mysql/centos/conf/etc/zabbix/web/maintenance.inc.php b/web-apache-mysql/centos/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-apache-mysql/centos/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-apache-mysql/centos/docker-entrypoint.sh b/web-apache-mysql/centos/docker-entrypoint.sh
index 57f27961f..94612251f 100755
--- a/web-apache-mysql/centos/docker-entrypoint.sh
+++ b/web-apache-mysql/centos/docker-entrypoint.sh
@@ -146,6 +146,10 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-apache-mysql/ubuntu/Dockerfile b/web-apache-mysql/ubuntu/Dockerfile
index 273094049..11f750b95 100644
--- a/web-apache-mysql/ubuntu/Dockerfile
+++ b/web-apache-mysql/ubuntu/Dockerfile
@@ -78,9 +78,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     ./locale/make_mo.sh && \
     mkdir -p /var/lib/locales/supported.d/ && \
     rm -f /var/lib/locales/supported.d/local && \
diff --git a/web-apache-mysql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php b/web-apache-mysql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-apache-mysql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-apache-mysql/ubuntu/docker-entrypoint.sh b/web-apache-mysql/ubuntu/docker-entrypoint.sh
index 82b0ffde1..cf7b4d8f8 100755
--- a/web-apache-mysql/ubuntu/docker-entrypoint.sh
+++ b/web-apache-mysql/ubuntu/docker-entrypoint.sh
@@ -146,6 +146,10 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-apache-pgsql/alpine/Dockerfile b/web-apache-pgsql/alpine/Dockerfile
index 3126c7826..336a40673 100644
--- a/web-apache-pgsql/alpine/Dockerfile
+++ b/web-apache-pgsql/alpine/Dockerfile
@@ -76,9 +76,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     chown --quiet -R zabbix:root /etc/zabbix/  && \
     chgrp -R 0 /etc/zabbix/  && \
     chmod -R g=u /etc/zabbix/  && \
diff --git a/web-apache-pgsql/alpine/conf/etc/zabbix/web/maintenance.inc.php b/web-apache-pgsql/alpine/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-apache-pgsql/alpine/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-apache-pgsql/alpine/docker-entrypoint.sh b/web-apache-pgsql/alpine/docker-entrypoint.sh
index b1619ce0b..16297630c 100755
--- a/web-apache-pgsql/alpine/docker-entrypoint.sh
+++ b/web-apache-pgsql/alpine/docker-entrypoint.sh
@@ -143,6 +143,10 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-apache-pgsql/centos/Dockerfile b/web-apache-pgsql/centos/Dockerfile
index 503d801fd..0c39cb276 100644
--- a/web-apache-pgsql/centos/Dockerfile
+++ b/web-apache-pgsql/centos/Dockerfile
@@ -66,9 +66,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     cat /usr/share/zabbix/include/locales.inc.php | grep display | grep true | awk '{$1=$1};1' | \
                 cut -d"'" -f 2 | sort | \
                 xargs -I '{}' bash -c 'echo "{}" && localedef -c -i {} -f UTF-8 {}.UTF-8 2>/dev/null' && \
diff --git a/web-apache-pgsql/centos/conf/etc/zabbix/web/maintenance.inc.php b/web-apache-pgsql/centos/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-apache-pgsql/centos/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-apache-pgsql/centos/docker-entrypoint.sh b/web-apache-pgsql/centos/docker-entrypoint.sh
index d0f9fa243..d924f2ff2 100755
--- a/web-apache-pgsql/centos/docker-entrypoint.sh
+++ b/web-apache-pgsql/centos/docker-entrypoint.sh
@@ -143,6 +143,10 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-apache-pgsql/ubuntu/Dockerfile b/web-apache-pgsql/ubuntu/Dockerfile
index 7465b79d2..4f2c0ad6f 100644
--- a/web-apache-pgsql/ubuntu/Dockerfile
+++ b/web-apache-pgsql/ubuntu/Dockerfile
@@ -78,9 +78,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     ./locale/make_mo.sh && \
     mkdir -p /var/lib/locales/supported.d/ && \
     rm -f /var/lib/locales/supported.d/local && \
diff --git a/web-apache-pgsql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php b/web-apache-pgsql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-apache-pgsql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-apache-pgsql/ubuntu/docker-entrypoint.sh b/web-apache-pgsql/ubuntu/docker-entrypoint.sh
index 09143acc7..10f005e3a 100755
--- a/web-apache-pgsql/ubuntu/docker-entrypoint.sh
+++ b/web-apache-pgsql/ubuntu/docker-entrypoint.sh
@@ -143,6 +143,10 @@ prepare_web_server() {
 prepare_zbx_web_config() {
     echo "** Preparing Zabbix frontend configuration file"
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-nginx-mysql/alpine/Dockerfile b/web-nginx-mysql/alpine/Dockerfile
index fc17edca4..0cfb6b66f 100644
--- a/web-nginx-mysql/alpine/Dockerfile
+++ b/web-nginx-mysql/alpine/Dockerfile
@@ -71,9 +71,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     chown --quiet -R zabbix:root /etc/zabbix/  && \
     chgrp -R 0 /etc/zabbix/  && \
     chmod -R g=u /etc/zabbix/  && \
diff --git a/web-nginx-mysql/alpine/conf/etc/zabbix/web/maintenance.inc.php b/web-nginx-mysql/alpine/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-nginx-mysql/alpine/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-nginx-mysql/alpine/docker-entrypoint.sh b/web-nginx-mysql/alpine/docker-entrypoint.sh
index 661c1f6ab..73bf1d9f3 100755
--- a/web-nginx-mysql/alpine/docker-entrypoint.sh
+++ b/web-nginx-mysql/alpine/docker-entrypoint.sh
@@ -159,6 +159,10 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-nginx-mysql/centos/Dockerfile b/web-nginx-mysql/centos/Dockerfile
index 53dcc4c1e..378f23c5b 100644
--- a/web-nginx-mysql/centos/Dockerfile
+++ b/web-nginx-mysql/centos/Dockerfile
@@ -62,9 +62,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     cat /usr/share/zabbix/include/locales.inc.php | grep display | grep true | awk '{$1=$1};1' | \
                 cut -d"'" -f 2 | sort | \
                 xargs -I '{}' bash -c 'echo "{}" && localedef -c -i {} -f UTF-8 {}.UTF-8 2>/dev/null' && \
diff --git a/web-nginx-mysql/centos/conf/etc/zabbix/web/maintenance.inc.php b/web-nginx-mysql/centos/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-nginx-mysql/centos/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-nginx-mysql/centos/docker-entrypoint.sh b/web-nginx-mysql/centos/docker-entrypoint.sh
index 30592d7b5..784768865 100755
--- a/web-nginx-mysql/centos/docker-entrypoint.sh
+++ b/web-nginx-mysql/centos/docker-entrypoint.sh
@@ -159,6 +159,10 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-nginx-mysql/ubuntu/Dockerfile b/web-nginx-mysql/ubuntu/Dockerfile
index fe77be554..39391cee6 100644
--- a/web-nginx-mysql/ubuntu/Dockerfile
+++ b/web-nginx-mysql/ubuntu/Dockerfile
@@ -88,9 +88,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     ./locale/make_mo.sh && \
     mkdir -p /var/lib/locales/supported.d/ && \
     rm -f /var/lib/locales/supported.d/local && \
diff --git a/web-nginx-mysql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php b/web-nginx-mysql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-nginx-mysql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-nginx-mysql/ubuntu/docker-entrypoint.sh b/web-nginx-mysql/ubuntu/docker-entrypoint.sh
index a9690d521..f99504e54 100755
--- a/web-nginx-mysql/ubuntu/docker-entrypoint.sh
+++ b/web-nginx-mysql/ubuntu/docker-entrypoint.sh
@@ -159,6 +159,10 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-nginx-pgsql/alpine/Dockerfile b/web-nginx-pgsql/alpine/Dockerfile
index 86788efdc..dfca29de7 100644
--- a/web-nginx-pgsql/alpine/Dockerfile
+++ b/web-nginx-pgsql/alpine/Dockerfile
@@ -70,9 +70,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     chown --quiet -R zabbix:root /etc/zabbix/ && \
     chgrp -R 0 /etc/zabbix/ && \
     chmod -R g=u /etc/zabbix/ && \
diff --git a/web-nginx-pgsql/alpine/conf/etc/zabbix/web/maintenance.inc.php b/web-nginx-pgsql/alpine/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-nginx-pgsql/alpine/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-nginx-pgsql/alpine/docker-entrypoint.sh b/web-nginx-pgsql/alpine/docker-entrypoint.sh
index 9d23ebf88..69c841b51 100755
--- a/web-nginx-pgsql/alpine/docker-entrypoint.sh
+++ b/web-nginx-pgsql/alpine/docker-entrypoint.sh
@@ -155,6 +155,10 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-nginx-pgsql/centos/Dockerfile b/web-nginx-pgsql/centos/Dockerfile
index 1fe3b86c5..cae4b5bb7 100644
--- a/web-nginx-pgsql/centos/Dockerfile
+++ b/web-nginx-pgsql/centos/Dockerfile
@@ -62,9 +62,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     cat /usr/share/zabbix/include/locales.inc.php | grep display | grep true | awk '{$1=$1};1' | \
                 cut -d"'" -f 2 | sort | \
                 xargs -I '{}' bash -c 'echo "{}" && localedef -c -i {} -f UTF-8 {}.UTF-8 2>/dev/null' && \
diff --git a/web-nginx-pgsql/centos/conf/etc/zabbix/web/maintenance.inc.php b/web-nginx-pgsql/centos/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-nginx-pgsql/centos/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-nginx-pgsql/centos/docker-entrypoint.sh b/web-nginx-pgsql/centos/docker-entrypoint.sh
index ffdc8ef14..8dc8c4dcd 100755
--- a/web-nginx-pgsql/centos/docker-entrypoint.sh
+++ b/web-nginx-pgsql/centos/docker-entrypoint.sh
@@ -155,6 +155,10 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}
diff --git a/web-nginx-pgsql/ubuntu/Dockerfile b/web-nginx-pgsql/ubuntu/Dockerfile
index a4fd8387c..a9e582ab6 100644
--- a/web-nginx-pgsql/ubuntu/Dockerfile
+++ b/web-nginx-pgsql/ubuntu/Dockerfile
@@ -88,9 +88,11 @@ RUN set -eux && \
     rm -rf /usr/share/zabbix-${ZBX_VERSION}/ && \
     cd /usr/share/zabbix/ && \
     rm -f conf/zabbix.conf.php && \
+    rm -f conf/maintenance.inc.php && \
     rm -rf tests && \
     ./locale/make_mo.sh && \
     ln -s "/etc/zabbix/web/zabbix.conf.php" "/usr/share/zabbix/conf/zabbix.conf.php" && \
+    ln -s "/etc/zabbix/web/maintenance.inc.php" "/usr/share/zabbix/conf/maintenance.inc.php" && \
     ./locale/make_mo.sh && \
     mkdir -p /var/lib/locales/supported.d/ && \
     rm -f /var/lib/locales/supported.d/local && \
diff --git a/web-nginx-pgsql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php b/web-nginx-pgsql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
new file mode 100644
index 000000000..4bd4791e0
--- /dev/null
+++ b/web-nginx-pgsql/ubuntu/conf/etc/zabbix/web/maintenance.inc.php
@@ -0,0 +1,32 @@
+<?php
+/*
+** Zabbix
+** Copyright (C) 2001-2016 Zabbix SIA
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+**/
+
+
+// Maintenance mode
+if (getenv('ZBX_DENY_GUI_ACCESS') == 'true') {
+    define('ZBX_DENY_GUI_ACCESS', 1);
+
+    // IP range, who are allowed to connect to FrontEnd
+    $ip_range = str_replace("'","\"",getenv('ZBX_GUI_ACCESS_IP_RANGE'));
+    $ZBX_GUI_ACCESS_IP_RANGE = (json_decode($ip_range)) ? json_decode($ip_range) : array();
+
+    // MSG shown on Warning screen!
+    $_REQUEST['warning_msg'] = getenv('ZBX_GUI_WARNING_MSG');
+}
diff --git a/web-nginx-pgsql/ubuntu/docker-entrypoint.sh b/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
index 39e12e6b6..b74181164 100755
--- a/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
+++ b/web-nginx-pgsql/ubuntu/docker-entrypoint.sh
@@ -155,6 +155,10 @@ prepare_zbx_web_config() {
         echo "listen.group = nginx" >> "$PHP_CONFIG_FILE"
     fi
 
+    export ZBX_DENY_GUI_ACCESS=${ZBX_DENY_GUI_ACCESS:-"false"}
+    export ZBX_GUI_ACCESS_IP_RANGE=${ZBX_GUI_ACCESS_IP_RANGE:-"['127.0.0.1']"}
+    export ZBX_GUI_WARNING_MSG=${ZBX_GUI_WARNING_MSG:-"Zabbix is under maintenance."}
+
     export ZBX_MAXEXECUTIONTIME=${ZBX_MAXEXECUTIONTIME:-"600"}
     export ZBX_MEMORYLIMIT=${ZBX_MEMORYLIMIT:-"128M"}
     export ZBX_POSTMAXSIZE=${ZBX_POSTMAXSIZE:-"16M"}