diff --git a/share/dtrace/Makefile b/share/dtrace/Makefile
index dd5e02cb4b64..7de5ccc77b99 100644
--- a/share/dtrace/Makefile
+++ b/share/dtrace/Makefile
@@ -17,7 +17,8 @@ SCRIPTS=	disklatency \
 		hotopen \
 		nfsclienttime \
 		tcpstate \
-		tcptrack
+		tcptrack \
+		tcpconn
 
 SCRIPTSDIR= ${SHAREDIR}/dtrace
 
diff --git a/share/dtrace/tcpconn b/share/dtrace/tcpconn
new file mode 100755
index 000000000000..5cf3c1cfa472
--- /dev/null
+++ b/share/dtrace/tcpconn
@@ -0,0 +1,47 @@
+#!/usr/sbin/dtrace -s
+/*
+ * Copyright (c) 2015 George V. Neville-Neil
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ * The tcpconn D script shows histograms of the source of TCP connections
+ *
+ * Usage: tcpconn
+ */
+
+#pragma D option quiet
+BEGIN
+{
+	printf("Press Ctrl-C for output\n");
+	printf("Source IP");
+}
+tcp:kernel::accept-established
+{
+	@sources[args[2]->ip_daddr] = count();	
+}
+tcp:kernel::accept-refused
+{
+	@sources[args[2]->ip_daddr] = count();	
+}