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From "Joshua Slive" <jos...@slive.ca>
Subject Re: [users@httpd] Reverse Proxy - Client IP
Date Fri, 28 Sep 2007 12:56:37 GMT
On 9/28/07, K Anand <kanand@sail-steel.com> wrote:
> I'm  using  apache 1.3.xx...I know it is way too old...
> My situation is as follows :
>
> Client   <----->   Apache      <------------>  Apache
>                          (Rev Proxy)                       (Backend)
>
> I have got access to CGI env vars on the Backend apache in my application. I
> would like to get the client IP there.
>
> I have tried this :
>
> SetEnv REMOTE_IDENT %{X-Forwarded-For}i
>
> and tried to access REMOTE_IDENT  in my application...But i get
> %{X-Forwarded-For}i and not the value ...

SetEnv can't do that. SetEnvIf might be able to (with a suitable
change in syntax -- see the docs), or you could use mod_rewrite. But
why are you bothering? Your application should be able to directly
access X-Forwarded-For.

(Also, careful using X-Forwarded-For because it could contain more
than one IP address in the case of a chain of proxies.)

Joshua.

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