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From Yann Ylavic <>
Subject Re: [users@httpd] ProxyPreserveHost doesn't work with SSL
Date Fri, 01 Jul 2016 20:19:06 GMT
On Fri, Jul 1, 2016 at 6:26 PM, Marat Khalili <> wrote:
> Because of SSL the problem is somewhat hard to debug, can't just packet
> trace. I tried to replace IIS application with CGI script on different
> Apache, without SSL, and found that ProxyPreserveHost is not ignored
> (environment variable SERVER_NAME set correctly to I guess for
> SSL the ProxyPreserveHost is implemented partially, i.e. for Host header but
> not for SNI. Any ideas on how to investigate?

Is the header Host sent by the proxy different from the one sent by
the client (with and without using SSL) or are you talking about the
SNI (in the SSL handshake) which is not set when using SSL?

In the latter case, you may need this fix released in from 2.4.20


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