### Append the two line below in httpd.conf.
AddType application/x-ns-proxy-autoconfig .pac
AddType application/x-ns-proxy-autoconfig .dat

### Edit the dhcpd.conf file appropriately.

option wpad-url code 252 = text;
option wpad-url "http://192.168.0.10/proxy.pac\n";
option wpad-url "http://192.168.0.10/wpad.dat\n";

### Edit the DNS zone file appropriately.

wpad       IN      A    192.168.1.1     ; wpad
proxy      IN      A    192.168.1.1     ; proxy

### Create wpad.dat and proxy.pac files and place them in the root directory of the webserver.

function FindProxyForURL(url,host)
{ 
  if(isPlainHostName(host)||
    isInNet(host,"192.168.0.0","255.255.255.0")) {
        return "PROXY 192.168.0.10:3128; DIRECT"; 
                }
  else return "PROXY 192.168.0.10:3128; DIRECT";
}