According to certain aspects, a method for performing remote backup operations is provided that includes receiving a first unidirectional connection request from a media agent module to a proxy device within an enterprise network, through a firewall. The method also includes receiving a second unidirectional connection request from a remote device coupled to an untrusted network, such as through a second firewall. Secure connections are established from the media agent module to the proxy and from the remote device to the proxy. Additionally, the method can include routing with the proxy device backup data from the remote computing device to the media agent over the secured connections. The method also may include storing the backup data on a storage device within the enterprise network. In certain embodiments, during establishment of the secure connections, identification of the media agent or the storage device is not exposed to the untrusted network.