diff --git a/ip6t-firewall-gateway b/ip6t-firewall-gateway
index 963f2df..8d8f1dd 100755
--- a/ip6t-firewall-gateway
+++ b/ip6t-firewall-gateway
@@ -3553,14 +3553,11 @@ fi
 echononl "\t\tNTP Service out only"
 
 if $allow_ntp_request_out ; then
-   for _dev in ${ext_if_arr[@]} ; do
-      $ip6t -A OUTPUT -o $_dev -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
-      if $kernel_forward_between_interfaces && ! $permit_local_net_to_inet ; then
-         $ip6t -A FORWARD -o $_dev -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
-      fi
-   done
 
+   # see : out_tcp_port_arr out_udp_port_arr at post_decalrations.conf
+   #
    echo_done
+
 else
    echo_skipped
 fi
@@ -3574,10 +3571,10 @@ echononl "\t\tNTP Service Gateway"
 if $local_ntp_service ; then
    if ! $allow_ntp_request_out ; then
       for _dev in ${ext_if_arr[@]} ; do
-         $ip6t -A OUTPUT -o $_dev -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
+         $ip6t -A OUTPUT -o $_dev -p udp --dport $standard_ntp_udp_port -m conntrack --ctstate NEW -j ACCEPT
       done
    fi
-   $ip6t -A INPUT -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
+   $ip6t -A INPUT -p udp --dport $standard_ntp_udp_port -m conntrack --ctstate NEW -j ACCEPT
    echo_done
 else
    echo_skipped
diff --git a/ipt-firewall-gateway b/ipt-firewall-gateway
index 5405e8b..e63fb43 100755
--- a/ipt-firewall-gateway
+++ b/ipt-firewall-gateway
@@ -4386,14 +4386,11 @@ fi
 echononl "\t\tNTP Service out only"
 
 if $allow_ntp_request_out ; then
-   for _dev in ${ext_if_arr[@]} ; do
-      $ipt -A OUTPUT -o $_dev -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
-      if $kernel_activate_forwarding && ! $permit_local_net_to_inet ; then
-         $ipt -A FORWARD -o $_dev -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
-      fi
-   done
 
+   # see : out_tcp_port_arr out_udp_port_arr at post_decalrations.conf
+   #
    echo_done
+
 else
    echo_skipped
 fi
@@ -4407,10 +4404,10 @@ echononl "\t\tNTP Service Gateway"
 if $local_ntp_service ; then
    if ! $allow_ntp_request_out ; then
       for _dev in ${ext_if_arr[@]} ; do
-         $ipt -A OUTPUT -o $_dev -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
+         $ipt -A OUTPUT -o $_dev -p udp --dport $standard_ntp_udp_port -m conntrack --ctstate NEW -j ACCEPT
       done
    fi
-   $ipt -A INPUT -p udp --dport $standard_ntp_port -m conntrack --ctstate NEW -j ACCEPT
+   $ipt -A INPUT -p udp --dport $standard_ntp_udp_port -m conntrack --ctstate NEW -j ACCEPT
    echo_done
 else
    echo_skipped