A method including receiving, by a processor associated with a read-only device, an access request to access an initial operating system from a requesting device associated with a virtual private network (VPN) server, the initial operating system being stored on a read-only memory associated with the read-only device; transmitting, by the processor to the requesting device based at least in part on receiving the access request, a request for authentication information associated with the VPN server; and controlling, by the processor, access to the initial operating system by the requesting device based at least in part on a result of a comparison of the authentication information associated with the VPN server with authentication information stored in the read-only memory. Various other aspects are contemplated.