I just want to revisit this on-list again. Yehuda has help tremendously, thank you Yehuda. I have the front end server set for proxy(reverse) in the httpd file:
ProxyPass /ifolder https://192.168.123.4/ifolderProxyPassReverse /ifolder https://192.168.123.4/ifolder
I have the modules loaded in loadmodule.conf:
LoadModule proxy_module /usr/lib/apache2-prefork/mod_proxy.so
LoadModule proxy_http_module /usr/lib/apache2-prefork/mod_proxy_http.so
Here are the logs on the front end server:
[Mon Feb 20 21:36:22 2012] [warn] proxy: No protocol handler was valid for the URL /ifolder. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.