apache - forward proxy

/etc/apache2/httpd.confに

LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy.so
LoadModule proxy_http_module /usr/lib/apache2/modules/mod_proxy_http.so
LoadModule proxy_connect_module /usr/lib/apache2/modules/mod_proxy_connect.so
< IfModule mod_proxy.c >
ProxyRequests On
< Proxy * >
Order deny,allow
Allow from 192.168.0
< / Proxy >
ProxyVia On
< / IfModule >

を追加