Journeys End

Introduction This guide will briefly take you through the process of setting up a automatic proxy configuration file hosted on debian server running apache2 so your client machines can configure themselves to use whatever proxies you might have. Writing a proxy.pac proxy.pac is the de-facto name for the proxy configuration file and is essentially a file containing the function definition for FindProxyForURL. This function is called by the browser when it attempts to connect to a URL in order to determine how it should do so. At the very least the file must contain:

function FindProxyForURL(url, host) { return "PROXY <your.proxy.server>:<port>"; }

Naturally you can do a lot more with this function, but that is beyond the scope of this article. Setting up apache2 Now that you have a proxy.pac, you need to put it somewhere where clients can access it, and it must have a mime-type of application/x-ns-proxy-autoconfig otherwise it won't work. One way to do this is to create a .htaccess file in the same directory and place in it the following line:

AddType application/x-ns-proxy-autoconfig .pac

In order for apache2 to read .htaccess you need the AllowOverride option in the proper <directory></directory> directive to be All or sufficiently permissive, for example:

<Directory /> Options +FollowSymLinks AllowOverride All </Directory>

And we are done Once all that is setup, just point your clients to http://where.proxy.pac.is.hosted/proxy.pac and tell them to use that for automatic proxy configuration. And viola! Well it worked for me anyways... Cheers, Steve