Issue

• Internal Apache httpd server IP address getting exposed while accessing Application using front end Apache httpd server over HTTPS using mod_proxy_http
  • For example backend internal Apache httpd node1 ip 192.168.1.2 and node2 is 192.168.1.3 and external Apache httpd ip 192.168.1.1 with reverse proxy setup as follows.

<Proxy balancer://mycluster>
    BalancerMember https://192.168.1.2:443 loadfactor=1 ping=10 ttl=600
    BalancerMember https://192.168.1.3:443 loadfactor=1 ping=10 ttl=600
    ProxySet lbmethod=byrequests
    Order allow,deny
    Allow from All
</Proxy>

   ProxyPass /myapp balancer://mycluster/myapp
   ProxyPassReverse /myapp balancer://mycluster/myapp 

In such case accessing url https://192.168.1.1/myapp exposes the ip address of one of internal Apache httpd server randomly.