Re: Reverse proxy

You mean my WAN facing httpd server and it's virthost configs and my 
internal httpd virt host configs? Correct.



On 10/6/2025 9:02 AM, Frank Gingras wrote:
>
>
> On Mon, Oct 6, 2025 at 11:47 AM Bret Stern 
> <[email protected]> wrote:
>
>     Thanks for the comment.
>
>     I had to remove one of my virtual hosts to to get this working.
>
>     My virtual host settings were triple checked...but the
>     DocumentRoot kept reverting to the
>     wrong virtual host DocRoot.
>
>     If the apache logic is to use the ServerName directive in the
>     [virthost *:80] as the deciding factor to set the DocRoot, then
>     either there is another
>     setting that I'm not aware of or there is a bug in the logic in
>     apache. When I have more time to
>     look, maybe it will surface. I have some other http servers in our
>     environments, so will check those results as well.
>
>     Regardless, all of this is excellent learning experience.
>     Bret
>
>
>     On 10/5/2025 12:08 AM, E.S. Rosenberg wrote:
>>     Hey Bret,
>>
>>     Unless I am very much mistaken you need to use the FQDN in the
>>     ProxyPass directive and if you don't want to expose the "real" IP
>>     of server B to the Internet you would need to "override" the
>>     public DNS records either in /etc/hosts or if you have the
>>     ability to present a different DNS view to server A and don't
>>     mind that complication that would be another option.
>>     You could I guess also use some internal FQDN as long as the
>>     virtualhosts on server B know to respond to that too and all the
>>     links they return are relative or rewritten to the domain server
>>     A presents.
>>
>>     HTH,
>>     Eliyahu - אליהו
>>
>>     Op zo 5 okt 2025 om 09:34 schreef Bret Stern
>>     <[email protected]>:
>>
>>         Can someone please comment.
>>
>>         Apache server A is a physical server on my network. I has
>>         three virtual
>>         hosts serving three
>>         different websites. This appears to be working correctly.
>>
>>         Introducing Apache server B
>>         Apache server A also acts as a reverse proxy to Apache server
>>         B which is
>>         another separate server with a static ip, and
>>         acts as my mail server.
>>
>>         There are two virtual hosts defined on Apache server B, one is
>>         mail.domain.com <http://mail.domain.com> and one is
>>         postfixadmin.domain.com <http://postfixadmin.domain.com>
>>
>>         My question is can Apache server A route (via reverse proxy)
>>         to the two
>>         virtual hosts on Apache server B.
>>
>>         At this point it's close to working, but my
>>         postfixadmin.domain.com <http://postfixadmin.domain.com> is
>>         having it's document root directed to
>>         virtual host mail.domain.com <http://mail.domain.com>,
>>         instead of postfixadmin.domain.com
>>         <http://postfixadmin.domain.com>
>>
>>         I've spent hours checking my virt host configurations. Is
>>         there some
>>         other setting outside the virtual host configuration that
>>         is allowing the DocumentRoot to be hijacked?
>>
>>         Can someone please confirm my setup is possible?
>>         Regards
>>
>>
>>
>>
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>
>
> You'll need to show the output from the apachectl -S command on all 
> servers get a complete answer, to start.