diff -ur nmap-3.78/portlist.h nmap-3.78mm/portlist.h
--- nmap-3.78/portlist.h	2004-11-12 21:21:27.000000000 +0100
+++ nmap-3.78mm/portlist.h	2004-12-21 13:58:01.000000000 +0100
@@ -113,7 +113,7 @@
 #define PORT_FRESH 5
 #define PORT_UNFILTERED 6
 #define PORT_OPENFILTERED 7 /* Like udp/fin/xmas/null/ipproto scan with no response */
-#define PORT_CLOSEDFILTERED 8 /* Idle scan */
+#define PORT_CLOSEDFILTERED 8 /* Idle scan or CONNECT returned ECONNREFUSED (RST or ICMP Port Unreachable) */
 #define PORT_HIGHEST_STATE 9 /* ***IMPORTANT -- BUMP THIS UP WHEN STATES ARE 
 				ADDED *** */
  
diff -ur nmap-3.78/scan_engine.cc nmap-3.78mm/scan_engine.cc
--- nmap-3.78/scan_engine.cc	2004-12-21 14:36:48.000000000 +0100
+++ nmap-3.78mm/scan_engine.cc	2004-12-21 14:34:36.000000000 +0100
@@ -1685,7 +1685,8 @@
       if (probe->isPing())
 	ultrascan_ping_update(USI, hss, probeI, &USI->now);
       else 
-	ultrascan_port_update(USI, hss, probeI, PORT_CLOSED, &USI->now);
+	ultrascan_port_update(USI, hss, probeI, PORT_CLOSEDFILTERED, &USI->now); /* Could be FILTERED too since ICMP Port
+                                                                                Unreachable ends in ECONNREFUSED too */
       break;
     }
   }
@@ -2163,7 +2164,7 @@
 	  newstate = PORT_FILTERED;
 	  break;
 	case ECONNREFUSED:
-	  newstate = PORT_CLOSED;
+	  newstate = PORT_CLOSEDFILTERED; /* Could be FILTERED too since ICMP Port Unreachable ends in ECONNREFUSED too */
 	  break;
 #ifdef ENOPROTOOPT
 	case ENOPROTOOPT: