Windows 8 Internet Explorer 11 proxy automation script

Question

Similar to this post, I'd like to change my proxy settings using a script. However, it fails. When I am behind the proxy, IE does not connect to the internet. Here I try the first solution from craig:

function FindProxyForURL(url, host) 
{ 
 if (isInNet(myIpAddress(), "myactualip", "myactualsubnetip")) 
  return "PROXY proxyasshowninpicture:portihavetouseforthisproxy_see_picture"; 
 else 
  return "DIRECT"; 
}

This script is saved as proxy.pac in c:\windows and my configuration is* in LAN settings: No automatically detected settings, yes, use automatic config script: file://c:/windows/proxy.pac No proxy server.

So, what am I doing wrong?

---------------- update --------------

However, when I set up a proxy in my LAN configurations:

IE -> Internet Options -> Connections -> LAN Settings 
check: Use a proxy Server for your LAN
Address: <a pingable proxy> Port: <portnr>

everything is fine for this environment. Now I try a simpler script like

function FindProxyForURL(url, host)
{
    return "PROXY <pingable proxy>:<portnr>; DIRECT";
}

With a configuration described above** I am not able to get through the proxy.

Are you sure myIpAddress() is returning what you think it is? In my experience it acts very buggy on systems with more than one network interface. For example it miss-reports the address sometimes on laptops with a wired and wireless connection. — Zoredache, Aug 14 '14 at 16:44
@Zodredace: I added a test without myIpAddress(). However, the script does not do what it is supposed to do. However, I also do not know how to test this behaviour. — Stefan Bollmann, Aug 20 '14 at 07:32

Stefan Bollmann · Accepted Answer · 2014-08-23T14:49:27.883

Finally this page lead me to my solution:

file://-based proxy scripts are deprecated in IE11.

There are some temporary registry hacks given, but I was not able to get my scripts to work with regedits. Finally I set up a local IIS server

Windows Start - "Control Panel." - click "Programs" link - "Turn Windows Features On or Off." 
Check the box labeled "Internet Information Services." Click "OK."

and moved my *.pac javascript file with the content

function FindProxyForURL(url, host)
{
    return "PROXY <proxyIP>:<proxyPort>; DIRECT";
}

into inetpub\wwwroot.

Afterwards I checked "Use automatic configuration script" in IE -> Internet Options -> Connections -> LAN Settings. Use the \inetpub\wwwroot\scriptFilename.

Windows 8 Internet Explorer 11 proxy automation script

1 Answers1