You could use the UserAgent. This is, of course, not fool proof ...
Wim
"eburnham" <eburnham@rfmd.com> wrote in message
news:40f301c24791$de9c9930$9ee62ecf@tkmsftngxa05...
> Hello,
>
> I am trying to allow certain users access to a webpage.
> Is there a method of allowing access based on a SIM
> number? If not, what is the best practice to keep unwanted
> users from accessing a site?
>
> Thanks,
>
> Erik