@Guydoum You will get two emails once you have reserved your sandbox. One advising of the reservation and set up is starting, the second will contain the following. Gateway, your username and password. This will look like this.
Lab Network Address: devnetsandbox-usw1-reservation.cisco.com:20192
Username: Foobar
Password: FTQVEYXV
If you do not get the email you can also retrieve your details via the output tab in your reservation.
Here is a guide https://developer.cisco.com/docs/sandbox/#!getting-started/what-is-devnet-sandbox
Once your VPN is connected you open a web browser to the IP address listed in the sandbox details on the left side
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