diff --git a/ttcn3-tcpdump-start.sh b/ttcn3-tcpdump-start.sh
new file mode 100755
index 0000000..1349cd7
--- /dev/null
+++ b/ttcn3-tcpdump-start.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+PIDFILE=/tmp/tcpdump.pid
+TESTCASE=$1
+
+if [ "z$TTCN3_PCAP_PATH" = "z" ]; then
+	TTCN3_PCAP_PATH=/tmp
+fi
+
+if [ -e $PIDFILE ]; then
+	kill "$(cat "$PIDFILE")"
+	rm $PIDFILE
+fi
+
+# NOTE: This requires you to be root or something like
+# "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file
+if [ "$(id -u)" = "0" ]; then
+	CMD=/usr/sbin/tcpdump
+else
+	CMD="sudo /usr/sbin/tcpdump"
+fi
+$CMD -s 0 -n -i any -w "$TTCN3_PCAP_PATH/$TESTCASE.pcap" >/dev/null 2>&1 &
+PID=$!
+echo $PID > $PIDFILE