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From Brian V Hughes <bria...@Dartmouth.EDU>
Subject Re: [users@httpd] How add / foward in header the remote_addr with proxy mode ?!
Date Fri, 11 Mar 2005 14:23:35 GMT
On Mar 11, 2005, at 09:03 AM, Joshua Slive wrote:
> On Fri, 11 Mar 2005 12:10:12 +0100, david micheneau
> <> wrote:
>> I've tried this:
>> RequestHeader add MyHeader-ip %{REMOTE_ADDR}e
>> I see in the header HTTP forwarded my header name but the value is 
>> null:
>> GET / HTTP/1.1
>> Max-forwards: 10
>> MyHeader-ip: (null)
> I believe that this capability is available only in the 2.1 version, 
> not in 2.0.
> But doesn't the proxy already add a similar header?  I think it is
> called X-Forwarded-For.

I do this all the time, under Apache 2.0.52. Actually, it was the 
people on this list that helped me with the syntax I needed to use, to 
both create my own environment variable (storing the value of the 
REMOTE_PORT server variable) and then setting that as a header using 
RequestHeader. Here's the set of directives I'm using, which is 
probably more than David needs, but I wanted to make sure I gave a 
complete example...

RewriteEngine on
RewriteCond %{REMOTE_PORT} (.*)
RewriteRule .* - [E=R_P:%1]

RequestHeader add X-Remote-Port %{R_P}e

When I then reverse-proxy this incoming request, to an app server 
running on a different port:

RewriteRule ^/(.*)$$1 [P,L]

The app server can access the client's remote port by grabbing the 
value of the "X-Remote-Port" HTTP header.


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