WOL Script Wake Up Your Webserver On Internet Traffic - RMerl/asuswrt-merlin.ng GitHub Wiki

This script is intended for people that want to wake up their server when someone tries to access a port on the server. The script doesn't mind which port was used and will respond to any request so if you have much forwarded ports a port scan will wake up your web server every time.

I rewrote the script a little to fit my own needs On the bottom of this page you will find another script, that script is intended for people that only want to wake a server on one port.

Changelog:
06/02/2017 Changed ether-wake path from /usr/bin/ether-wake to /usr/sbin/ether-wake [Change in 380.65]

Guide For Wake On Lan Script :

  • Go to your router and login (192.168.1.1) With username and password
  • Go to administration and enable JFFS partition + Format JFFS partition at next boot
  • Enable SSH And Telnet

foto1

  • Hit Apply and reboot your router !

  • Download WINSCP Download

  • Start WINSCP and login foto 2

  • Be sure to select protocol SCP, your username and password are the ones you setup for your router.

( WINSCP will give a warning about some groups missing, this is fine doesnt affect your job )

  • Go to your root folder and click JFFS Foto3

  • There should be a folder scripts ( if not there create it ! )

  • Inside the folder JFFS right click >New>File. Name the file services-start Paste in the content.

#!/bin/sh

#script for sending WOL packets when traffic to specified ip's
sh /jffs/scripts/wake.sh&

foto4

  • Create another file name it wake.sh and paste in
#!/bin/sh

INTERVAL=5
NUMP=1
OLD=""
TARGET=IP OF THE TARGET YOU WANT TO WAKE
IFACE=br0
MAC=MAC ADRESS OF THE TARGET YOU WANT TO WAKE
WOL=/usr/sbin/ether-wake
LOGFILE="/var/log/ether-wake.log"

while sleep $INTERVAL;do
NEW=`dmesg | awk '/ACCEPT/ && /DST='"$TARGET"'/ {print }' | tail -1`
SRC=`echo $NEW | awk -F'[=| ]' '/SRC/{for(i=1;i<=NF;i++) if($i ~ /SRC/) print $(i+1)}'`
DPORT=`echo $NEW | awk -F'[=| ]' '/DPT/{for(i=1;i<=NF;i++) if($i ~ /DPT/) print $(i+1)}'`
PROTO=`echo $NEW | awk -F'[=| ]' '/PROTO/{for(i=1;i<=NF;i++) if($i ~ /PROTO/) print $(i+1)}'`

if [ "$NEW" != "" -a "$NEW" != "$OLD" ]; then
if ! ping -qc $NUMP $TARGET >/dev/null; then
# echo "NOWAKE $TARGET was accessed by $SRC, port $DPORT, protocol $PROTO and is already alive at" `date`>> $LOGFILE
# else
echo "WAKE $TARGET requested by $SRC, port $DPORT, protocol $PROTO at" `date`>> $LOGFILE
$WOL -i $IFACE $MAC
sleep 5
fi
OLD=$NEW
fi
done
  • Put the IP and MAC in the script

foto5

Now it should look like this Foto6

Now we need to do some telnet ssh command.

Download PUTTY Download

  • Go ahead and login with putty ( 192.168.1.1 )

foto9

  • Give the router username and password

Now copy and paste into putty

chmod +x /jffs/scripts/wake.sh

chmod +x /jffs/scripts/services-start

With those command you made your files executable.

We need to do one more final step !

  • Login to your router webpage 192.168.1.1 > go to firewall and set logged packets to ACCEPTED
  • Hit apply Now reboot your router , Its time for some testing

foto10

ALTERNATIVE

Use this script if you only want to specify one port to wake up your server

#!/bin/sh

INTERVAL=5
NUMP=3
OLD=""
TARGET=PUT YOUR INTERNAL IP ADRESS HERE!
PORT=SPECIFY YOUR PORT HERE!
IFACE=br0
MAC=PUT YOUR MAC ADRESS HERE!
WOL=/usr/sbin/ether-wake
LOGFILE="/var/log/ether-wake.log"

while sleep $INTERVAL;do
NEW=`dmesg | awk '/ACCEPT/ && /DST='"$TARGET"'/ && /DPT='"$PORT"'/ {print }' | tail -1`
SRC=`echo $NEW | awk -F'[=| ]' '/SRC/{for(i=1;i<=NF;i++) if($i ~ /SRC/) print $(i+1)}'`
DPORT=`echo $NEW | awk -F'[=| ]' '/DPT/{for(i=1;i<=NF;i++) if($i ~ /DPT/) print $(i+1)}'`
PROTO=`echo $NEW | awk -F'[=| ]' '/PROTO/{for(i=1;i<=NF;i++) if($i ~ /PROTO/) print $(i+1)}'`

if [ "$NEW" != "" -a "$NEW" != "$OLD" ]; then
if ! ping -qc $NUMP $TARGET >/dev/null; then
# echo "NOWAKE $TARGET was accessed by $SRC, port $DPORT, protocol $PROTO and is already alive at" `date`>> $LOGFILE
# else
echo "WAKE $TARGET requested by $SRC, port $DPORT, protocol $PROTO at" `date`>> $LOGFILE
$WOL -i $IFACE $MAC
sleep 5
fi
OLD=$NEW
fi
done

Alternative 2 - Not logging all accepted & multiple server waking

If you dont want to log everything you can leave the firewall logged packets to none if you create a "nat-start" script containing:

#!/bin/sh
iptables -I FORWARD -d <Destination IP> -p tcp --dport <Destination_Port> -j LOG --log-prefix "[2WAKE] <Mac_Addr_To_wake> "

and the wake.sh containing:

#!/bin/sh

INTERVAL=3
NUMP=1
OLD=""
IFACE=br0
WOL=/usr/sbin/ether-wake

logger "AUTO WOL Script started at" `date`

while sleep $INTERVAL;do
NEW=`dmesg | awk '/2WAKE/ {print }' | tail -1`

if [ "$NEW" != "" -a "$NEW" != "$OLD" ]; then

   MAC=`dmesg | awk -F'[=| ]' '/2WAKE/ {print $2}' | tail -1`
   TARGET=`dmesg | awk -F'[=| ]' '/2WAKE/ {print $10}' | tail -1`
   SRC=`dmesg | awk -F'[=| ]' '/2WAKE/ {print $8}' | tail -1`

   if ping -qc $NUMP $TARGET >/dev/null; then
      logger "NOWAKE $TARGET was accessed by $SRC and is already alive at" `date`
          sleep 500
   else
      logger "WAKE $SRC causes WOL of $TARGET using $MAC at" `date`
      $WOL -i $IFACE $MAC | logger
      sleep 5
   fi
   OLD=$NEW
fi
done