Add support for Epson Network Scanner.

ip6t-firewall-gateway

@@ -3315,6 +3315,35 @@ else
    echo_skipped
 fi
 
+echononl "\t\tEpson Network Scanner (Port $epson_scan_port) only between local Networks"
+
+if [[ ${#epson_scanner_ip_arr[@]} -gt 0 ]] \
+      && $kernel_forward_between_interfaces \
+      && ! $permit_between_local_networks \
+      && $allow_scanning_between_local_nets ; then 
+   for _ip in ${epson_scanner_ip_arr[@]} ; do
+      for _dev in ${local_if_arr[@]} ; do
+         # - UDP
+         $ip6t -A FORWARD -i $_dev -p udp -d $_ip --dport $epson_scan_port -m conntrack --ctstate NEW -j ACCEPT
+         # - TCP
+         $ip6t -A FORWARD -i $_dev -p tcp -d $_ip --dport $epson_scan_port -m conntrack --ctstate NEW -j ACCEPT
+
+         # - Note:
+         # - If (local) alias interfaces like eth1:0 in use, youe need a further
+         # - special rule.
+         # -
+         if $local_alias_interfaces ; then
+            $ip6t -A FORWARD -o $_dev -p tcp -d $_ip --dport $epson_scan_port --tcp-flag ACK ACK -j ACCEPT
+            $ip6t -A FORWARD -o $_dev -p tcp -s $_ip --sport $epson_scan_port --tcp-flag ACK ACK -j ACCEPT
+         fi
+      done
+   done
+
+   echo_done
+else
+   echo_skipped
+fi
+