diff --git a/check_net.conf.sample b/check_net.conf.sample
index 4ce23af..99fd11a 100644
--- a/check_net.conf.sample
+++ b/check_net.conf.sample
@@ -11,6 +11,11 @@ netconfig_script=/usr/local/sbin/netconfig.sh
 
 log_file=/var/log/check_net.log
 
+# - If no inet device is online at startup, no ping address can be determined and further on
+# - no online test is possible. So use this ip-address as backup ping address.
+# -
+BACKUP_PING_ADDR="8.8.8.8"
+
 
 # - Put in your DSL devices (refers to your network configuration)
 # - youe wish be congigured by that script
diff --git a/check_net.sh b/check_net.sh
index 0ee4573..3d56f20 100755
--- a/check_net.sh
+++ b/check_net.sh
@@ -60,10 +60,19 @@ set_ping_addresses () {
 
    if [ ${#ping_ip_arr[@]} -lt 1 ]; then
       echo "`date +'%Y-%m-%d %H:%M:%S'` [ Error ] Setting IP-Address(es) for ping test FAILED!" >> $log_file
+      if [[ ${#previous_ping_ip_arr[@]} -gt 0 ]] ; then
+         ping_ip_arr=("${previous_ping_ip_arr[@]}")
+         echo "`date +'%Y-%m-%d %H:%M:%S'` [ Warn ] Take IP-Address(es) from previous ping test:" >> $log_file 
+         echo "`date +'%Y-%m-%d %H:%M:%S'` [ Warn ]    ${ping_ip_arr[@]}" >> $log_file
+      else
+         ping_ip_arr+=("$BACKUP_PING_ADDR")
+      fi
    else
       if $DEBUG ; then
          echo "`date +'%Y-%m-%d %H:%M:%S'` [ Info  ] IP-Addresses for ping tests set to ${ping_ip_arr[@]}" >> $log_file 
       fi
+      unset previous_ping_ip_arr
+      previous_ping_ip_arr=("${ping_ip_arr[@]}")
    fi
 }
 usage() { 
@@ -123,12 +132,12 @@ if mkdir "$LOCK_DIR" 2> /dev/null ; then
 else
 
    datum=`date +"%d.%m.%Y"`
-   msg="[ Error ]: A previos instance of script \"`basename $0`\" seems already be running.\n\n           Exiting now.."
+   msg="[ Error ]: A previous instance of script \"`basename $0`\" seems already be running.\n\n           Exiting now.."
    echo -e "To:${admin_email}\n${content_type}\nSubject:DSL Script Error $company -- $datum\n\n${msg}\n" | /usr/sbin/sendmail -F "DSL Monitoring $company" -f $from_address $admin_email 2> /dev/null
 
    if $LOGGING_CONSOLE ; then
       echo ""
-      echo "[ Error ]: A previos instance script \"`basename $0`\" seems already be running."
+      echo "[ Error ]: A previous instance script \"`basename $0`\" seems already be running."
       echo ""
       echo "           Exiting now.."
       echo ""
@@ -209,6 +218,7 @@ for inet_device in "${online_devices_arr[@]}" ; do
 done
 
 declare -a ping_ip_arr;
+declare -a previous_ping_ip_arr;
 
 
 #echo "--"
@@ -308,8 +318,17 @@ while true ; do
          else
             failed=true
             for _key in ${!ping_ip_arr[@]} ; do
-               /sbin/ip rule add to ${ping_ip_arr[$_key]} table $rt_name
-               if ping -q -c2 ${ping_ip_arr[$_key]} >/dev/null 2>&1 ; then
+               if $DEBUG ; then
+                  echo "`date +'%Y-%m-%d %H:%M:%S'` [ Debug ] route add -net ${ping_ip_arr[$_key]} netmask 255.255.255.255 gw $remote_gw_address" >> $log_file
+               fi
+               #/sbin/ip rule add to ${ping_ip_arr[$_key]} table $rt_name
+               route add -net ${ping_ip_arr[$_key]} netmask 255.255.255.255 gw $remote_gw_address
+
+               if $DEBUG ; then
+                  echo "`date +'%Y-%m-%d %H:%M:%S'` [ Debug ] ping4 -I $inet_device -q -c2 ${ping_ip_arr[$_key]}" >> $log_file
+               fi
+               #if ping -q -c2 ${ping_ip_arr[$_key]} >/dev/null 2>&1 ; then
+               if ping4 -I $inet_device -q -c2 ${ping_ip_arr[$_key]} >/dev/null 2>&1 ; then
                   if $DEBUG ; then
                      _local_gw=`curl -4 https://meine-ip.oopen.de 2> /dev/null` 
                      if [ -n "$_local_gw" ]; then
@@ -317,12 +336,22 @@ while true ; do
                      fi
                      echo "`date +'%Y-%m-%d %H:%M:%S'` [ Debug ] Ping test (to ${ping_ip_arr[$_key]}) for device \"${inet_device}\" was successful." >> $log_file
                   fi
-                  /sbin/ip rule del to ${ping_ip_arr[$_key]} table $rt_name
+
+                  if $DEBUG ; then
+                     echo "`date +'%Y-%m-%d %H:%M:%S'` [ Debug ] route del -net ${ping_ip_arr[$_key]} netmask 255.255.255.255 gw $remote_gw_address" >> $log_file
+                  fi
+                  #/sbin/ip rule del to ${ping_ip_arr[$_key]} table $rt_name
+                  route del -net ${ping_ip_arr[$_key]} netmask 255.255.255.255 gw $remote_gw_address
                   failed=false
                   device_is_online=true
                   break
                fi
-               /sbin/ip rule del to ${ping_ip_arr[$_key]} table $rt_name
+
+               if $DEBUG ; then
+                  echo "`date +'%Y-%m-%d %H:%M:%S'` [ Debug ] route del -net ${ping_ip_arr[$_key]} netmask 255.255.255.255 gw $remote_gw_address" >> $log_file
+               fi 
+               #/sbin/ip rule del to ${ping_ip_arr[$_key]} table $rt_name
+               route del -net ${ping_ip_arr[$_key]} netmask 255.255.255.255 gw $remote_gw_address
             done
             if $failed ; then
                echo "`date +'%Y-%m-%d %H:%M:%S'` [ Error ] Ping test for device \"${inet_device}\" failed" >> $log_file