Save file to specific path (with IP Address)

I am using FileUpload Control to upload a file and save file to a path.
I have two servers, 71 and 72. User can open my application from any server.
I want to save files to 71 server irrespective of from which server user logged in.
Even if user opens my application from 72 server and upload the file, the file should get saved to 71 server.
I tried hard-coding the path with IP Address. But the FileUpload control doesn't accept paths with IP Address.
Please suggest a solution.