> Oh, ok. Thanks I didn't know that CGI.HTTP_REFER could be
> disabled by a SYSADMIN.
>
> But then if the CGI.HTTP_REFER can be disabled, then what
> other CGI variable can be disabled then?
You can't count on the existence of CGI variables, in general. There's only
one that will always exist from the browser, and that's the one that
contains the IP address of the browser, CGI.REMOTE_ADDR or CGI.REMOTE_HOST.
Anything else that the browser may provide is optional, so to speak, and can
be removed by proxy servers. As for what's available from the server, that
will depend on how the server is configured, and of course, you can see what
variables your server provides.
All of the variables that begin with "HTTP_" come from the browser.
Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
voice: (202) 797-5496
fax: (202) 797-5444
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