diff --git a/doc/README.NetConsole b/doc/README.NetConsole
index c8bcb90a39..070e86a6f7 100644
--- a/doc/README.NetConsole
+++ b/doc/README.NetConsole
@@ -11,6 +11,9 @@ port of the destination. The format is <ip_addr>:<port>. If <port> is
 omitted, the value of 6666 is used. If the env var doesn't exist, the
 broadcast address and port 6666 are used. If it is set to an IP
 address of 0 (or 0.0.0.0) then no messages are sent to the network.
+The source / listening port can be configured separately by setting
+the 'ncinport' environment variable and the destination port can be
+configured by setting the 'ncoutport' environment variable.
 
 For example, if your server IP is 192.168.1.1, you could use:
 
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 14243b8a92..86f5301141 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -36,7 +36,8 @@ static int output_recursion;
 static int net_timeout;
 static uchar nc_ether[6]; /* server enet address */
 static IPaddr_t nc_ip; /* server ip */
-static short nc_port; /* source/target port */
+static short nc_out_port; /* target output port */
+static short nc_in_port; /* source input port */
 static const char *output_packet; /* used by first send udp */
 static int output_packet_len;
 
@@ -71,7 +72,7 @@ void NcStart(void)
 		net_set_arp_handler(nc_wait_arp_handler);
 		pkt = (uchar *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE;
 		memcpy(pkt, output_packet, output_packet_len);
-		NetSendUDPPacket(nc_ether, nc_ip, nc_port, nc_port,
+		NetSendUDPPacket(nc_ether, nc_ip, nc_out_port, nc_in_port,
 			output_packet_len);
 	}
 }
@@ -80,7 +81,7 @@ int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len)
 {
 	int end, chunk;
 
-	if (dest != nc_port || !len)
+	if (dest != nc_in_port || !len)
 		return 0; /* not for us */
 
 	debug_cond(DEBUG_DEV_PKT, "input: \"%*.*s\"\n", len, len, pkt);
@@ -139,7 +140,7 @@ static void nc_send_packet(const char *buf, int len)
 	memcpy(pkt, buf, len);
 	ether = nc_ether;
 	ip = nc_ip;
-	NetSendUDPPacket(ether, ip, nc_port, nc_port, len);
+	NetSendUDPPacket(ether, ip, nc_out_port, nc_in_port, len);
 
 	if (inited)
 		eth_halt();
@@ -148,20 +149,30 @@ static void nc_send_packet(const char *buf, int len)
 static int nc_start(void)
 {
 	int netmask, our_ip;
+	char *p;
 
-	nc_port = 6666;		/* default port */
+	nc_out_port = 6666; /* default port */
+	nc_in_port = nc_out_port;
 
 	if (getenv("ncip")) {
-		char *p;
 
 		nc_ip = getenv_IPaddr("ncip");
 		if (!nc_ip)
 			return -1;	/* ncip is 0.0.0.0 */
 		p = strchr(getenv("ncip"), ':');
-		if (p != NULL)
-			nc_port = simple_strtoul(p + 1, NULL, 10);
+		if (p != NULL) {
+			nc_out_port = simple_strtoul(p + 1, NULL, 10);
+			nc_in_port = nc_out_port;
+		}
 	} else
-		nc_ip = ~0;		/* ncip is not set */
+		nc_ip = ~0; /* ncip is not set, so broadcast */
+
+	p = getenv("ncoutport");
+	if (p != NULL)
+		nc_out_port = simple_strtoul(p, NULL, 10);
+	p = getenv("ncinport");
+	if (p != NULL)
+		nc_in_port = simple_strtoul(p, NULL, 10);
 
 	our_ip = getenv_IPaddr("ipaddr");
 	netmask = getenv_IPaddr("netmask");
diff --git a/tools/netconsole b/tools/netconsole
index c8109bb095..1a0ef22244 100755
--- a/tools/netconsole
+++ b/tools/netconsole
@@ -2,7 +2,7 @@
 
 usage() {
 	(
-	echo "Usage: $0 <board IP> [board port]"
+	echo "Usage: $0 <board-IP> [board-port [board-in-port]]"
 	echo ""
 	echo "If port is not specified, '6666' will be used"
 	[ -z "$*" ] && exit 0
@@ -24,9 +24,13 @@ while [ -n "$1" ] ; do
 done
 
 ip=$1
-port=${2:-6666}
+board_out_port=${2:-6666}
+board_in_port=${3:-${board_out_port}}
 
-if [ -z "${ip}" ] || [ -n "$3" ] ; then
+echo Board out port: ${board_out_port}
+echo Board in port: ${board_in_port}
+
+if [ -z "${ip}" ] || [ -n "$4" ] ; then
 	usage "Invalid number of arguments"
 fi
 
@@ -41,19 +45,19 @@ stty -icanon -echo intr ^T
 (
 if type ncb 2>/dev/null ; then
 	# see if ncb is in $PATH
-	exec ncb ${port}
+	exec ncb ${board_out_port}
 
 elif [ -x ${0%/*}/ncb ] ; then
 	# maybe it's in the same dir as the netconsole script
-	exec ${0%/*}/ncb ${port}
+	exec ${0%/*}/ncb ${board_out_port}
 
 else
 	# blah, just use regular netcat
-	while ${nc} -u -l -p ${port} < /dev/null ; do
+	while ${nc} -u -l -p ${board_out_port} < /dev/null ; do
 		:
 	done
 fi
 ) &
 pid=$!
-${nc} -u ${ip} ${port}
+${nc} -u ${ip} ${board_in_port}
 kill ${pid} 2>/dev/null