diff --git a/script/monitor/generic/NGINX_CHECK.sh b/script/monitor/generic/NGINX_CHECK.sh
index c6eab8b..faa6522 100755
--- a/script/monitor/generic/NGINX_CHECK.sh
+++ b/script/monitor/generic/NGINX_CHECK.sh
@@ -13,7 +13,7 @@ _SOCKET='~/.ssh/%r@%h:%p'
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 3 ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit 0 &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
diff --git a/script/monitor/generic/OVERRIDDEN_DOMAIN_CHECK.sh b/script/monitor/generic/OVERRIDDEN_DOMAIN_CHECK.sh
index 40c166c..48810d1 100755
--- a/script/monitor/generic/OVERRIDDEN_DOMAIN_CHECK.sh
+++ b/script/monitor/generic/OVERRIDDEN_DOMAIN_CHECK.sh
@@ -13,7 +13,7 @@ _SOCKET='~/.ssh/%r@%h:%p'
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 3 ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit 0 &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
diff --git a/script/monitor/generic/ZFS_POOL_CHECK.sh b/script/monitor/generic/ZFS_POOL_CHECK.sh
index 458ec9b..164e2da 100755
--- a/script/monitor/generic/ZFS_POOL_CHECK.sh
+++ b/script/monitor/generic/ZFS_POOL_CHECK.sh
@@ -14,7 +14,7 @@ _SOCKET='~/.ssh/%r@%h:%p'
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 3 ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit 0 &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
diff --git a/script/monitor/generic/ZFS_SYNC_CHECK.sh b/script/monitor/generic/ZFS_SYNC_CHECK.sh
index 1849627..b524050 100755
--- a/script/monitor/generic/ZFS_SYNC_CHECK.sh
+++ b/script/monitor/generic/ZFS_SYNC_CHECK.sh
@@ -30,7 +30,7 @@ _DEBUG_PATH="/tmp/monitor/"
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 3 ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit 0 &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
diff --git a/script/monitor/generic/ZFS_USAGE_CHECK.sh b/script/monitor/generic/ZFS_USAGE_CHECK.sh
index f276824..b8ffc6c 100755
--- a/script/monitor/generic/ZFS_USAGE_CHECK.sh
+++ b/script/monitor/generic/ZFS_USAGE_CHECK.sh
@@ -13,7 +13,7 @@ _SOCKET='~/.ssh/%r@%h:%p'
 
 
 function checkOrStartSSHMaster() {
-    timeout --preserve-status 3 ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit 0 &> /dev/null \
+    timeout --preserve-status 1 ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} 2>&1 | grep -q -F 'Master running' \
         && return 0
 
     ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null