2008/7/31 David A. Parker
<dparker@utica.edu>
Could you have a web form which collects all the necessary information from the user, and then sends it to the UNIX server in a file which your application can parse? That way, users would not be interacting with the UNIX server at all.
I think David's absolutely right: this is almost certainly the easiest and most secure way to achieve your stated goal. On submission of the form, the web app would write the submitted data to a file (or database) and feed it to your UNIX app.