Você também pode bloquear todas as solicitações de proxy de todas as sub-redes, exceto as internas, recomendadas pelo link e link .
You can control who can access your proxy via the <Proxy> control block as in the following example:
<Proxy *>
Order Deny,Allow
Deny from all
Allow from 192.168.0
</Proxy>
For more information on access control directives, see mod_authz_host.
Strictly limiting access is essential if you are using a forward proxy (using the ProxyRequests directive). Otherwise, your server can be used by any client to access arbitrary hosts while hiding his or her true identity. This is dangerous both for your network and for the Internet at large. When using a reverse proxy (using the ProxyPass directive with ProxyRequests Off), access control is less critical because clients can only contact the hosts that you have specifically configured.
Eu acredito que isso resultará em respostas "403 Proibidas" para o cliente, o que é um pouco menos seguro do que um "404 Not Found" porque um "403 Proibido" fornece uma dica de que algo ainda está lá, mas é proibido.