SSL and ProxyPass

Server Config
1

Hi,

I have review hundreds of google threads but have been unable to get this working.

I am trying to pass https traffic from a front-end apache server to a backend apache. This type of forwarding works:

<VirtualHost *:80>
    ServerName www.domain.com 
    ServerAlias domain.com
    ProxyPreserveHost On
    ProxyPass / http://172.16.0.183/
    ProxyPassReverse / http://172.16.0.183/
    <Proxy http://172.16.0.183> 
       Allow from 172.16.0.183
    </Proxy>
</VirtualHost>

But this does not load the signed certificate and fails:

<VirtualHost 172.16.0.183:443>
    ServerName www.domain.com 
    ServerAlias domain.com
    
    <Proxy *> 
        Order deny,allow
        Allow from 172.16.0.183
    </Proxy>
    
    SSLEngine on
    SSLProxyEngine on
    
    SSLCertificateFile /etc/ssl/certs/domain.com.crt
    SSLCertificateKeyFile /etc/ssl/private/domain.com.key
    SSLCACertificateFile /etc/ssl/bundles/gd_bundle.crt
    
    ProxyRequests Off
    ProxyPreserveHost On
    ProxyPass / https://172.16.0.183/
    ProxyPassReverse / https://172.16.0.183/
</VirtualHost>

I have installed the signed certificate in the correct paths (as referenced in the SSLCertificateFile, SSLCertificateKeyFile, and SSLCertificateFile in the config).

I have confirmed that the HTTPS is working on the back-end server. If I don’t try to go through the proxy both the http and https work.

Can you help troubleshoot this for me I have run out of things to try as I have scoured the apache documentation and tried to implement all of the appropriate mod_ssl and mod_proxy directives.

Your help is appreciated on this.

Regards,
Steve