From 8317f3912c9cb09ee4f0cad799da6e9fb9baec9e Mon Sep 17 00:00:00 2001
From: sven <sven.auhagen@voleatech.de>
Date: Thu, 24 Aug 2017 06:57:03 +0200
Subject: [PATCH] As discussed

---
 src/usr/local/sbin/ppp-linkdown | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/usr/local/sbin/ppp-linkdown b/src/usr/local/sbin/ppp-linkdown
index 933e9fa91e..19429ad004 100755
--- a/src/usr/local/sbin/ppp-linkdown
+++ b/src/usr/local/sbin/ppp-linkdown
@@ -27,7 +27,7 @@ if [ -f /tmp/${IF}up ] && [ -f /conf/${IF}.log ]; then
 	/usr/local/sbin/ppp-log-uptime.sh $seconds ${IF} &
 fi
 
-if [ ${IF} !=~ "ppp[0-9]*" ]; then
+if echo "${IF}" | egrep -qv "ppp[0-9]+"; then
 	/etc/rc.kill_states ${IF} ${LOCAL_IP}
 fi