Re: Some sites don't like X-Forwarded-For: unknown

On Fri, Feb 20, 1998 at 12:24:42PM +1000, Dancer wrote:
> Hmm..
>
> 0.0.0.0? May be a more obvious choice.
>
> D
>
> Arjan de Vet wrote:
>
> > I got a complaint that http://www.low-spirit.de/ gave a "No Object Data"
> > error message. After some digging into HTTP headers I found out that this
> > site does not like the following header:
> >
> > X-Forwarded-For: unknown
> >
> > which you get when using 'forwarded_for off'. The server immediately closes
> > the connection without any message.
> >
> > I solved it by replacing "unknown" in http.c with "127.0.0.1". A more
> > sophisticated way would be using random IP numbers :-).
> >
> > Arjan
>

We recognized the same strange behaviour with a german server.
I tracked down the problem to the x-forwarded-for: header.
The problem on the remote Apache was a third party module
called "zmod" which is used in Germany for the IVW measurement
of pageviews and visits and hits. They had compiled an older
version of that module which was a bit buggy. So in the case
above there might be something in the same direction.

Best regards
Andreas

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