CentOS - Jun 2016 - haproxy + Apache + virtual hosts -> wrong host is displayed

Hello,

I hope my question is not off-topic here.

On CentOS 7.2.1511 I have installed:
haproxy-1.5.14-3.el7.x86_64
httpd-2.4.6-40.el7.centos.1.x86_64

The /etc/haproxy/haproxy.cfg binds HAProxy to
ports 80 and 443 and accepts HTTPS to slova.de:

defaults
    mode                    http
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
....
frontend public
    bind 144.76.184.151:80
    bind 144.76.184.151:443 ssl crt /etc/pki/tls/certs/slova.de.pem
    reqidel ^X-Forwarded-Proto:
    reqidel ^X-Forwarded-For:
    reqadd X-Forwarded-Proto:\ https if { ssl_fc }
    option forwardfor
    default_backend apache

backend apache
    server domain 127.0.0.1:8080

The /etc/httpd/conf/httpd.conf binds Apache
to port 8080 and serves several Wordpress sites:

Listen 127.0.0.1:8080
ServerName 144.76.184.151

<VirtualHost 127.0.0.1:8080>
    DocumentRoot /var/www/html/afarber.de
    ServerName afarber.de
    ErrorLog logs/afarber.de/error_log
    CustomLog logs/afarber.de/access_log common
</VirtualHost>

<VirtualHost 127.0.0.1:8080>
    DocumentRoot /var/www/html/ruhrgebietsingle.de
    ServerName ruhrgebietsingle.de
    ErrorLog logs/ruhrgebietsingle.de/error_log
    CustomLog logs/ruhrgebietsingle.de/access_log common
</VirtualHost>

<VirtualHost 127.0.0.1:8080>
    DocumentRoot /var/www/html/bukvy.de
    ServerName bukvy.de
    ErrorLog logs/bukvy.de/error_log
    CustomLog logs/bukvy.de/access_log common
</VirtualHost>

<VirtualHost 127.0.0.1:8080>
    DocumentRoot /var/www/html/slova.de
    ServerName slova.de
    ErrorLog logs/slova.de/error_log
    CustomLog logs/slova.de/access_log common
</VirtualHost>

When I open http://slova.de or https://www.slova.de
they work fine. But when I try to open same URLs
with "www." prepended, the browser displays
http://ruhrgebietsingle.de (the 2nd site out of 4)

Why does it happen? I just can not figure it out.

What tool would help here to debug?

Thank you
Alex

Ok, I had to add ServerAlias for each server, didn't think of it because
before I had a mod_rewrite rule to remove the "www." prefix...

On Fri, Jun 24, 2016 at 9:58 PM, Alexander Farber <
alexander.farber at gmail.com> wrote:
>
> On CentOS 7.2.1511 I have installed:
> haproxy-1.5.14-3.el7.x86_64
> httpd-2.4.6-40.el7.centos.1.x86_64
>
> The /etc/haproxy/haproxy.cfg binds HAProxy to
> ports 80 and 443 and accepts HTTPS to slova.de:
>
> defaults
>     mode                    http
>     option http-server-close
>     option forwardfor       except 127.0.0.0/8
>     option                  redispatch
> ....
> frontend public
>     bind 144.76.184.151:80
>     bind 144.76.184.151:443 ssl crt /etc/pki/tls/certs/slova.de.pem
>     reqidel ^X-Forwarded-Proto:
>     reqidel ^X-Forwarded-For:
>     reqadd X-Forwarded-Proto:\ https if { ssl_fc }
>     option forwardfor
>     default_backend apache
>
> backend apache
>     server domain 127.0.0.1:8080
>
> The /etc/httpd/conf/httpd.conf binds Apache
> to port 8080 and serves several Wordpress sites:
>
> Listen 127.0.0.1:8080
> ServerName 144.76.184.151
>
> <VirtualHost 127.0.0.1:8080>
>     DocumentRoot /var/www/html/afarber.de
>     ServerName afarber.de
>     ErrorLog logs/afarber.de/error_log
>     CustomLog logs/afarber.de/access_log common
> </VirtualHost>
>
> <VirtualHost 127.0.0.1:8080>
>     DocumentRoot /var/www/html/ruhrgebietsingle.de
>     ServerName ruhrgebietsingle.de
>     ErrorLog logs/ruhrgebietsingle.de/error_log
>     CustomLog logs/ruhrgebietsingle.de/access_log common
> </VirtualHost>
>
> <VirtualHost 127.0.0.1:8080>
>     DocumentRoot /var/www/html/bukvy.de
>     ServerName bukvy.de
>     ErrorLog logs/bukvy.de/error_log
>     CustomLog logs/bukvy.de/access_log common
> </VirtualHost>
>
> <VirtualHost 127.0.0.1:8080>
>     DocumentRoot /var/www/html/slova.de
>     ServerName slova.de
>     ErrorLog logs/slova.de/error_log
>     CustomLog logs/slova.de/access_log common
> </VirtualHost>
>
> When I open http://slova.de or https://slova.de
<https://www.slova.de>
> they work fine. But when I try to open same URLs
> with "www." prepended, the browser displays
> http://afarber.de <http://ruhrgebietsingle.de> (the 1st site out of
4)
>
>
>