Configuring httpd forward proxy to restrict destinations by subnet

[Mike Maiorana <zfreak@xxxxxxxxx>]

I have an Apache httpd v2.2 server (on Centos 6) set up as a forward proxy to get to a DMZ in a test lab environment. It is working, but I would like to restrict destinations to specific subnets, both IPv4 and IPv6. I've searched for a solution and have not been able to find and answer.

Here is the virtualhost segment of my httpd.conf file:

<VirtualHost 10.10.10.185:8080>

  ProxyRequests On

  ProxyVia On

  ProxyBlock "10.20.30.30"

  <Proxy *>

    Order deny,allow

    Allow from 10.1.0.0/24 

    Deny from all

  </Proxy>

  ErrorLog "/var/log/httpd/proxy-error.log"

  CustomLog "/var/log/httpd/proxy-access.log" common

</VirtualHost>

The above config allows incoming connections from the 10.1.0.0/24 subnet. It does not allow connections specifically to 10.20.30.30 through the proxy. Instead of blocking that single address, I would like to specify a set of subnets that are allowed, and everything else be denied. For example, allow:

2001:1111:2222:301::0/64

2001:1111:2222:302::0/64

10.20.40.0/24

But block everything else from passing through the proxy. I understand that this would block any url that used a hostname instead of an IP address.

Thanks in advance for any help you can provide.

Regards,

Mike M.