Unable to configure apache proxy with HTTPS

Question

I have an apache proxy server used to redirect my HTTP website to different servers. Everything works well for HTTP websites.

I have an Exchange Server 2013 and I would like to access OWA (https://my.domain.com/owa) from internet through my apache proxy server but I have this 502 error message when I try to access the URL:

proxy 502 error message

Here is my virtual host configuration:

<VirtualHost *:*>

    ServerName my.domain.com
    DocumentRoot /var/www/html

    SSLEngine on
    SSLProxyEngine on
    SSLCertificateFile /var/www/certs/webmail.crt
    SSLCertificateKeyFile /var/www/certs/webmail.key

    ProxyRequests Off
    ProxyPreserveHost on
    ProxyPass / https://192.168.1.50/
    ProxyPassReverse / https://192.168.1.50/

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

Here is my /var/log/apache2/error.log:

[Wed Jan 31 17:13:12.992025 2018] [proxy_http:error] [pid 15213:tid 140120288065280] (103)Software caused connection abort: [client 80.12.xx.xxx:55964] AH01102: error reading status line from remote server 192.168.1.50:443

[Wed Jan 31 17:13:12.992179 2018] [proxy:error] [pid 15213:tid 140120288065280] [client 80.12.xx.xxx:55964] AH00898: Error reading from remote server returned by /owa

Can you please help me to understand ?

Many thanks

Answer 1

You may want to have a look here:

• https://github.com/phr0gz/Apache-reverse-proxy-for-Exchange-2010-2013-2016 and
• https://www.experts-exchange.com/questions/22814577/Help-with-reverse-proxy-Apache-OWA-setup.html

Answer 2

Increasing timeouts by adding timeout=7200 to the ProxyPass directive helped in my case:

ProxyPass / https://192.168.1.50/ timeout=7200