AutoStart OpenVPN

In this short post, I am going to share with you a script called autostartvpn that will allow you to start and stop the connection to Hack The Box through Openvpn automatically.

This script can be added to your /usr/bin/ path to run it as a normal Linux command.
INFORMATIVE

The script receives only one parameter through which to specify the type of VPN to start:

-M Run the Machines VPN
-S Run the StartingPoint VPN
-E Run the EndGames VPN
-F Run the Fortresses VPN
-R Run the Release Arena VPN
-stop Stop all the VPN instances
–help Run the helpPanel”

Remember, before running it, make sure you have entered the path corresponding to each Hack The Box ovpn file in the global variables section.
important !!

The runvpn function allows you to automatically start your vpn instance, and shows you the IP associated to your tun0 interface corresponding to your VPN.

The stopvpn function (–stop param) allows you to stop all previously executed processes to prevent further network interfaces from being spawned like tun1, tun2 etc. This function is called too by runvpn function when a previous interface is running, so you don’t have to worry about stopping the previous instance.

Shell

autostartvpn

#!/bin/bash

#By Nevuer
 
# Colours
declare -r greenColour="\e[0;32m\033[1m"
declare -r endColour="\033[0m\e[0m"
declare -r redColour="\e[0;31m\033[1m"
declare -r blueColour="\e[0;34m\033[1m"
declare -r yellowColour="\e[0;33m\033[1m"
declare -r purpleColour="\e[0;35m\033[1m"
declare -r turquoiseColour="\e[0;36m\033[1m"
declare -r grayColour="\e[0;37m\033[1m"

# Global Variables
declare -r PATH_MACHINES="" # Path to machines ovpn file
declare -r PATH_STARTING_POINT="" # Path to starting point ovpn file
declare -r PATH_ENDGAMES="" # Path to endgames ovpn file
declare -r PATH_FORTRESSES="" # Path to fortresses ovpn file
declare -r PATH_RELEASE_ARENA="" #Path to release arena ovpn file

function ctrl_c(){
	echo -e "\n${redColour}[*]${endColour}${blueColour} Exiting…${endColour}"
	sleep 1
	tput cnorm
	exit 1
}

trap ctrl_c INT

function helpPanel(){
	
	echo -e "\nUsage:"
	echo -e "	autostartvpn [options]\n"
	echo -e "Options:\n"
	echo -e "	-M 		Run the Machines VPN"
	echo -e "	-S 		Run the StartingPoint VPN"
	echo -e "	-E		Run the EndGames VPN"
	echo -e "	-F		Run the Fortresses VPN"
	echo -e "	-R		Run the Release Arena VPN"
	echo -e "	-stop		Stop all the VPN instances"
	echo -e "	–help		Run this helpPanel"
}

function runvpn() {

	tput civis
	if [ -f "$1" ]; then
		echo -e "\n${purpleColour}Running the VPN file :${endColour}${blueColour} $1${endColour}"
		set +m
        	ifconfig tun0 > /dev/null 2>&1; if [ $? -eq 0 ]; then stopvpn; fi
        	sudo openvpn $1 > /dev/null 2>&1 &
        	ifconfig tun0 > /dev/null 2>&1; until [ $? -eq 0 ];do ifconfig tun0 > /dev/null 2>&1; done
        	ip=$(ifconfig tun0 | grep -E "destination" | awk 'NF{print $NF}')
		echo -e "\n${blueColour}VPN IP –> ${endColour}${greenColour}$ip${endColour}"
        	kitty @ set-tab-title "VPN: $ip"
		set -m
	else 
		echo -e "${redColour}\nVPN File not found${endColour}"
		exit 1
	fi
	tput cnorm
}

function stopvpn(){
        
	echo -e "${redColour}\n[*] Killing existing processes…${endColour}"
	set +m
        for PID in $(ps -aux | grep openvpn | grep root | awk '{print $2}');do sudo kill -9 $PID > /dev/null 2>&1; done
	set -m
}

case "$1" in
  "-M")
	echo -e "${turquoiseColour}\n[+]${endColour}${greenColour}Connecting to the Machines${endColour}"
    	runvpn $PATH_MACHINES
	;;
  "-S")
	echo -e "${turquoiseColour}\n[+]${endColour}${greenColour}Connecting to the Starting Point${endColour}"
    	runvpn $PATH_STARTING_POINT
    	;;
  "-E")
    	echo -e "${turquoiseColour}\n[+]${endColour}${greenColour}Connecting to the Endgames${endColour}"
	runvpn $PATH_ENDGAMES
    	;;
  "-F")
    	echo -e "${turquoiseColour}\n[+]${endColour}${greenColour}Connecting to the Fortresess${endColour}"
	runvpn $PATH_FORTRESESS
    	;;
  "-R")
	echo -e "${turquoiseColour}\n[+]${endColour}${greenColour}Connecting to the Release Arena${endColour}"
	runvpn $PATH_RELEASE_ARENA
	;;
  "-stop")
    	echo -e "\n${purpleColour}[-] Disabling VPN…${endColour}"
	stopvpn
	;;
  "–help")
	helpPanel
	exit 1
	;;
  *)
    	helpPanel
    	exit 1
    	;;
esac

I hope you find it helpful.

See you in the next post.

Remember, before running it, make sure you have entered the path corresponding to each Hack The Box ovpn file in the global variables section.

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