Cloud based disaster recovery solution?

Hi all, my boss tasked me to find a cloud based disaster recovery solution. We're a small company and are looking to backup all of our servers. I am not an IT guy but he thinks i am. This is what he wants. A cloud based server that can be a domain controller, dns,dhcp,file server, have a firewall and vpn access for 50 to 70 users. Is that something a cloud server can do? do you know of any vendors that can do this? please let me know. thanks