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Re: modify the REMOTE_ADDR part of the http header

From: Daniel Stenberg <>
Date: Wed, 19 Dec 2001 10:44:30 +0100 (MET)

On Wed, 19 Dec 2001, Sangeetha Naik wrote:

> I am trying to modify the REMOTE_ADDR part of the http header for an http
> post. This is the script I used. Its written in perl with the Curl::easy
> module

Eh. I think you're confusing things here. There is no header named
'REMOTE_ADDR' in a regular HTTP request (be it get or post or others).

REMOTE_ADDR is usually an enviornment variable set by the web server before
CGI scripts/programs are invoked. The address it picks is probably picked
from the IP layer.

While you *can* set a header named that with curl, I don't think it'll make
any difference at all to what the environment variable will be set to.

> As you can see I am using CURLOPT_HTTPHEADER to modify the REMOTE_ADDR
> variable. But it does not really change that variable on the other side.
> However I am have been successful in changing the HTTP_REFERER and

Yes, as the 'HTTP' prefix suggests, those variables are picked from the HTTP
request itself. The ones without HTTP prefix are not.

    Daniel Stenberg -- curl groks URLs --
Received on 2001-12-19