diff --git a/README b/README
index b92c3d2..e51f9ce 100644
--- a/README
+++ b/README
@@ -5,7 +5,9 @@ by Manuel Kasper, Monzoon Networks AG <mkasper@monzoon.net>
 
 Changes
 -------
-v1.2	Allow inbound/outbound in graphs to be swapped (via option
+v1.2	Support for sFlow (through sflow-asstatd.pl); fix for link names
+		with upper-case characters
+		Allow inbound/outbound in graphs to be swapped (via option
 		in www/func.inc)
 
 v1.1	Fix for a potential race condition surrounding $childrunning
diff --git a/contrib/centos/as-stats b/contrib/centos/as-stats
new file mode 100755
index 0000000..ca4a62a
--- /dev/null
+++ b/contrib/centos/as-stats
@@ -0,0 +1,80 @@
+#! /bin/bash
+#
+# as-stats - Start/Stop the as-stats NetFlow collector.
+#
+# chkconfig: 2345 90 10
+# description: as-stats is a program that collects NetFlow data
+#              and process it in order to show the different 
+#              sourced / destinated IP traffic AS.
+
+# Source function library.
+. /etc/init.d/functions
+
+DAEMON=netflow-asstatd.pl
+RRDDIR=/data/as-stats/rrd
+KNOWNLINKS=/data/as-stats/etc/netflow-knownlinks
+
+prog="as-stats"
+
+start() {
+        echo -n $"Starting $prog: "
+
+        # start daemon
+        daemon /data/as-stats/bin/$DAEMON $RRDDIR $KNOWNLINKS >> /data/as-stats/output.log &
+	RETVAL=$?
+	echo
+	[ $RETVAL = 0 ] && touch /var/lock/subsys/as-stats
+	return $RETVAL
+}
+
+stop() {
+        echo -n $"Stopping $prog: "
+        
+        # stop daemon
+        killproc $DAEMON
+        RETVAL=$?
+        echo
+        [ $RETVAL = 0 ] && rm -f /var/lock/subsys/as-stats
+        return $RETVAL
+}       
+
+restart() {
+        stop
+        start
+}       
+
+reload() {
+        echo -n $"Reloading $prog daemon configuration: "
+        killproc $DAEMON -HUP
+        RETVAL=$?
+        echo
+        return $RETVAL
+}       
+
+rhstatus() {
+	status $DAEMON
+}
+
+case "$1" in
+  start)
+        start
+        ;;
+  stop)
+        stop
+        ;;
+  restart)
+        restart
+        ;;
+  reload)
+        reload
+        ;;
+  status)
+        rhstatus
+        ;;
+  *)
+        echo $"Usage: $0 {start|stop|status|reload|restart}"
+        exit 1
+esac
+
+exit $RETVAL
+
diff --git a/www/gengraph.php b/www/gengraph.php
index 0f21116..0fe3ab3 100644
--- a/www/gengraph.php
+++ b/www/gengraph.php
@@ -8,7 +8,7 @@
 require_once('func.inc');
 
 $as = $_GET['as'];
-if (!preg_match("/^[0-9a-z]+$/", $as))
+if (!preg_match("/^[0-9a-zA-Z]+$/", $as))
 	die("Invalid AS");
 
 header("Content-Type: image/png");
diff --git a/www/linkgraph.php b/www/linkgraph.php
index d2b7973..510198f 100644
--- a/www/linkgraph.php
+++ b/www/linkgraph.php
@@ -14,7 +14,7 @@ if ($_GET['numtop'] && $_GET['numtop'] <= 50)
 $ascolors = array("D41C0E", "E45605", "FECF12", "2FA11C", "19BB7C", "0A4484", "0A7484", "4CB4C4", "971928", "1f348c");
 
 $link = $_GET['link'];
-if (!preg_match("/^[a-z0-9]+$/", $link))
+if (!preg_match("/^[0-9a-zA-Z]+$/", $link))
 	die("Invalid link");
 
 /* first step: walk the data for all ASes to determine the top 5 for the given link */