Double-proxy remote data access system

Apparatus for enabling access to a data resource, which is held on a file server on a first local area network (LAN), by a client on a second LAN, which is coupled to the first LAN via a wide area network (WAN), the apparatus comprising a proxy receiver, which comprises:

• a network interface configured to be coupled to the second LAN;
• and
• a processor, which is configured to intercept a request for the data resource submitted by the client on the second LAN, and responsive to the request, to send, via the network interface, a message via the WAN to a proxy transmitter on the first LAN, requesting the data resource, to receive, via the network interface, a replica of the data resource transmitted over the WAN by the proxy transmitter, wherein the replica was retrieved by the proxy transmitter from the file server over the first LAN in response to the message, and to serve the replica of the data resource to the client over the second LAN.

Apparatus for enabling access to a data resource which is held on a file server on a first local area network (LAN), by a client on a second LAN which is coupled to the first LAN via a wide area network (WAN), the apparatus comprising a proxy transmitter, which comprises:

• a network interface configured to be coupled to the first LAN;
• and
• a processor, which is configured to receive a message transmitted via the WAN to the proxy transmitter from a proxy receiver on the second LAN, the proxy transmitter being separate from the proxy receiver, in response to a request for the data resource submitted by the client and intercepted by the proxy receiver, and, in response to the message, to retrieve a replica of the data resource from the file server over the first LAN, to perform a cross-file-system protocol translation between the proxy transmitter and the proxy receiver, and to convey, via the network interface, the replica of the data resource over the WAN to the proxy receiver.