https://developer.cisco.com/site/sandbox/
*Click Get Started With sandbox
*Search Devbox and Reversed
after that its will generate a VPN for connecting to putty and procedure to putty at left after connecting to putty type the text below
wget https://raw.githubusercontent.com/mrX04/Cisco-DevNet-Sandbox/master/DevBox-Windows2012.sh &> /dev/null chmod +x DevBox-Windows2012.sh ./DevBox-Windows2012.sh