METHOD AND SYSTEM FOR REMOTE NETWORKING USING PORT PROXYING BY DETECTING IF THE DESIGNATED PORT ON A CLIENT COMPUTER IS BLOCKED, THEN ENCAPSULATING THE COMMUNICATIONS IN A DIFFERENT FORMAT AND REDIRECTING TO AN OPEN PORT

• US 6,938,096 B1
• Filed: 03/17/2000
• Issued: 08/30/2005
• Est. Priority Date: 04/12/1999
• Status: Expired due to Term

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Softricity (Microsoft Corporation)
• Inventors: Schaefer, Stuart, Greschler, David M., Mysliwy, Owen
• Primary Examiner(s): Dharia, Rupal
• Assistant Examiner(s): NGUYEN, QUANG N
• Application Number:
  US09/531,121
• Time in Patent Office: 1,992 Days
• Field of Search: 709/201, 709/203, 709/219, 709/223, 709/230, 709/245, 709/238, 709/239, 709/217, 709/224
• US Class Current: 709/239
• CPC Class Codes: G06F 8/60 Software deployment

Abstract

A method and system for serving software applications to remote clients across the internet, for example, is disclosed that preferably utilizes standard, SMB (server message block), protocols, which are available in commercial operating systems. Further, an associated business method is described in which subscribing institutions can out-source the application serving to a third party institution, transparently. Finally, a port proxy system is provided that enables tunneling through firewalls that are configured to block communications from SMB ports.

Claims

1. A method for enabling remote networking functionality by port proxying, the method comprising:

executing a process on a local client computer employing a networking protocol over a port of the client computer assigned to support the network protocol;

determining whether the port of the client computer assigned to support the network protocol is blocked;

on the local client computer, if the port of the client computer assigned to support the network protocol is blocked, intercepting communications in a first communication format from the process to the blocked port

encapsulating the intercepted communications in the first communication format in a second communication format; and

redirecting the encapsulated communications in the second communication format over an open port on the client computer compatible with said second communication format.

2. A method as described in claim 1, wherein the step of executing the process comprises executing an application program.

3. A method as described in claim 1, wherein the step of executing the process comprises executing an application program residing on a remote storage asset.

4. A method as described in claim 1, wherein the process utilizes SMB networking.

5. A method as described in claim 1, wherein the step of intercepting communications from the process comprises intercepting communications for port 139.

6. A method as described in claim 1, wherein the step of intercepting communications from the process comprises addressing the communications to an address assigned for local loop-back.

7. A method as described in claim 1, wherein the step of redirecting the communications over the open port comprises encapsulating the communications in an HTTP packet.

8. A method as described in claim 7, wherein the communications are located in a post data portion of the HTTP packet.

9. A method as described in claim 1, wherein the open port is an HTTP port.

10. A method as described in claim 1, wherein the open port is a HTTP port.

11. A method as described in claim 1, further comprising constructing an application descriptor file for coordinating actions between a client and a server.

12. A system for remote networking by port proxy, the system comprising:

an application program executing on a client computer employing the SMB protocol to access a remote storage asset; and

a port proxy program, running on the client computer, that determines whether a port assigned to support the SMB protocol is blocked, and if so, intercepts communications in a first communication format from the application program to the port assigned to support the SMB protocol and encapsulates the communications in a second communication format and redirects the communications in the second communication format over an open port on the client computer compatible with said second communication format.

13. A system as described in claim 12, wherein the open port is an HTTP port.

14. A system as described in claim 12, wherein the open port is an FTP port.

15. A system as described in claim 12, wherein the SMB port is port 139.

16. A system as described in claim 12, wherein the communications are addressed for local loop-back.

17. A system as described in claim 12, wherein port proxy program encapsulates the communications in an HTTP packet.

18. A system as described in claim 17, wherein the communications are located in a post data portion of the HTTP packet.

19. A system as described in claim 12, further comprising an application descriptor file on a server for coordinating actions between a client and the server.