If you want to use your personal environment, just download the VPN configuration directly via the BattleH4ck platform. In the 3-dot hamburger menu next to your profile picture, there is a function to download your VPN profile.
Once downloaded, use a tool capable of initiating this vpn profile like :
- OpenVPN : https://openvpn.net/vpn-client/
- Pritunl : https://client.pritunl.com/
The VPN profile is initialized, you must launch a mission.