Call to external program

[eluser]Ajaxian64[/eluser]
Hello all,

I have to set up this kind of architecture:
A Server on a PC in a local network, with CI. On the same PC runs a Perl application.
Sometimes the server receives request from users (www or from local network users) and has to request someting to the Perl program.
----
Solution that I see is:
Using a socket UDP to send request to the Perl Program

Do you see another solution ?

Thanks