<IfModule mod_proxy.c>
       #turning ProxyRequests on and allowing proxying from all may allow
       #spammers to use your proxy to send email.

       ProxyRequests Off

       <Proxy *>
               AddDefaultCharset off
               Order deny,allow
               Deny from all
               #Allow from .example.com
       </Proxy>

       # Enable/disable the handling of HTTP/1.1 "Via:" headers.
       # ("Full" adds the server version; "Block" removes all outgoing Via: headers)
       # Set to one of: Off | On | Full | Block

       ProxyVia On
</IfModule>