diff --git a/config/etc/pf.conf b/config/etc/pf.conf
index d2844b8d..ad47fdf2 100644
--- a/config/etc/pf.conf
+++ b/config/etc/pf.conf
@@ -10,6 +10,9 @@ int_net = "192.168.1.0/24"
 # MSN, ICQ/AIM, Yahoo, IRC
 im_ports = "{ 1863, 5190, 5050, 6667 }"
 
+# FCM ports for Firebase push notifications
+fcm_ports = "{ 5228, 5229, 5230 }"
+
 openvpn = "{ tun0, tun1 }"
 
 table <RestrictedIPs> persist file "/etc/pf.restrictedips"
@@ -87,6 +90,9 @@ pass out log on $int_if proto tcp from $int_if to port ssh
 # UTMFW Web Administration Interface
 pass in log on $int_if proto tcp from $int_net to $int_if port { www, https }
 
+# Firebase push notifications for internal mobile devices
+#pass in log on $int_if proto tcp from $int_net to port $fcm_ports
+
 # DNS queries to UTMFW
 pass in log on $int_if proto { tcp, udp } from $int_net to $int_if port { domain, bootps }
 
diff --git a/config/utmfw.files b/config/utmfw.files
index 818d9ce9..f309bc72 100644
--- a/config/utmfw.files
+++ b/config/utmfw.files
@@ -87,7 +87,7 @@ etc/p3scan/p3scan-tr-utf8.mail,644,root,wheel
 etc/p3scan/p3scan-nl.mail,644,root,wheel
 etc/p3scan/p3scan.conf,644,root,wheel
 etc/pfre/pf.conf.afterhours,600,root,wheel
-etc/php-7.0/cul.ini,644,root,bin
+etc/php-7.0/curl.ini,644,root,bin
 etc/php-7.0/mcrypt.ini,644,root,bin
 etc/php-7.0/pcntl.ini,644,root,bin
 etc/pmacct/pmacctd-pnrg.conf,644,root,wheel
diff --git a/meta/install.sub b/meta/install.sub
index e0f774ef..7d7a734b 100755
--- a/meta/install.sub
+++ b/meta/install.sub
@@ -660,6 +660,7 @@ __EOT
 				pkg_add php-pcntl
 				pkg_add php-mcrypt
 				pkg_add php-cgi
+				pkg_add php-curl
 				;;
 			esac
 			;;
diff --git a/src/Model/dhcpd.php b/src/Model/dhcpd.php
index a3840fdc..bbd80275 100644
--- a/src/Model/dhcpd.php
+++ b/src/Model/dhcpd.php
@@ -104,10 +104,18 @@ function __construct()
 	 */
 	function Start()
 	{
+		global $TmpFile;
+
 		if (($ifs= $this->_getIfs()) !== FALSE) {
 			$ifs= explode("\n", $ifs);
 			$ifs= implode(' ', $ifs);
-			return $this->RunShellCommand("/usr/sbin/dhcpd $ifs");
+			$this->RunShellCommand("/usr/sbin/dhcpd $ifs > $TmpFile 2>&1");
+
+			/// Start command is redirected to tmp file
+			$output= file_get_contents($TmpFile);
+			Error($output);
+			ctlr_syslog(LOG_INFO, __FILE__, __FUNCTION__, __LINE__, "Start output: $output");
+			return $this->IsRunning();
 		}
 		return FALSE;
 	}
diff --git a/src/Model/system.php b/src/Model/system.php
index 759e3df6..8b681e4d 100644
--- a/src/Model/system.php
+++ b/src/Model/system.php
@@ -1305,7 +1305,8 @@ function IsNotifierEnabled()
 	function DisableNotifier()
 	{
 		$tmp= $this->cronDir.'root';
-		$this->PutFile($tmp, $this->getRootCronTab());
+		// Do not use PutFile(), it expects file to exist
+		file_put_contents($tmp, $this->getRootCronTab(), LOCK_EX);
 
 		$retval= $this->ReplaceRegexp($tmp, "?^(\h*\*/1\h+\*\h+\*\h+\*\h+\*\h+/usr/local/bin/php\h+/var/www/htdocs/utmfw/Notifier/notify.php\h+.*)$?m", '#${1}');
 		if (file_exists($tmp.'.bak')) {
@@ -1324,7 +1325,8 @@ function DisableNotifier()
 	function EnableNotifier()
 	{
 		$tmp= $this->cronDir.'root';
-		$this->PutFile($tmp, $this->getRootCronTab());
+		// Do not use PutFile(), it expects file to exist
+		file_put_contents($tmp, $this->getRootCronTab(), LOCK_EX);
 
 		$retval= $this->ReplaceRegexp($tmp, "?^\h*#(\h*\*/1\h+\*\h+\*\h+\*\h+\*\h+/usr/local/bin/php\h+/var/www/htdocs/utmfw/Notifier/notify.php\h+.*$)?m", '${1}');
 		if (file_exists($tmp.'.bak')) {