Default SSL and ProxyPass redirect to another domains (on another computer) with it's own SSL

Question

The question is is it possible to do following on Ubuntu with apache2, ProxyPass and SSL enabled:

1. I have main server, let's say it's domain is http://domain.com - working OK

2. I have SSL enabled with certificate for domain.com and www.domain.com and https://domain.com is working OK

3. By default, I have 2 conf files in /etc/apache2/sites-enabled - 000-default handling the *.80 virtual hosts and default-ssl handling the *.443 virtual hosts. In this second file I have specified all certificate files for domain.com

4. In 000-default I have ProxyPass set redirectiong to server handling the domain subdomain.domain.com on local computer 192.168.0.100 - working OK

5. I have certificates installed on 192.168.0.100 for subdomain.domain.com. If I point my browser to https://subdomain.domain.com it gives warning, because it loads the certificate for domain.com.

How to make so, that the request for https://subdomain.domain.com to be transfered to 192.168.0.100 and load it's files (for https://subdomain.domain.com)?

Answer 1

Here is my working code

<VirtualHost *:443>
  ServerName subdomain.domain.com
  ServerAdmin admin@domain.com

  SSLEngine On
  SSLCertificateKeyFile /etc/ssl/private/subdomain.key
  SSLCertificateFile    /etc/ssl/certs/subdomain.crt
  SSLCertificateChainFile /etc/ssl/server.ca.pem
  SSLCACertificateFile /etc/ssl/ca.pem

  BrowserMatch ".*MSIE.*" \
    nokeepalive ssl-unclean-shutdown \
    downgrade-1.0 force-response-1.0

  LogLevel warn
  CustomLog /var/log/apache2/access.log combined
  ErrorLog /var/log/apache2/error.log

  SSLProxyEngine On
  ProxyPreserveHost On
  ProxyRequests Off
  ProxyPass / https://192.168.0.100/
  ProxyPassReverse / https://192.168.0.100/

  php_flag display_errors on
  php_value error_reporting 7
</VirtualHost>