Is there some method to prevent Windows (or the browser) from popping up the proxy authentication dialog every time I open a browser? Surely there should be some setting to use my user name and password automatically?

The saved information does appear in the pop-up authentication window, I want to avoid the pop-up entirely (since it serves no purpose, and gets annoying as I have to click it hundreds of times)

Note that I have no access to the proxy server itself, or know what type it is.

In case this information is necessary - Wireshark shows the following

CONNECT www.google.com:443 HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:23.0) Gecko/20100101 Firefox/23.0
Proxy-Connection: keep-alive
Connection: keep-alive
Host: www.google.com

HTTP/1.1 407 Proxy Authentication Required
Proxy-Authenticate: BASIC realm="InetPass"
Cache-Control: no-cache
Pragma: no-cache
Content-Type: text/html; charset=utf-8
Proxy-Connection: close
Set-Cookie: BCSI-CS-e9e87a9198535326=2; Path=/
Connection: close
Content-Length: 1785

(HTML page follows, displayed if authentication fails)

Thanks in advance


Found a solution for Firefox (version 23) from here (comment by Sherwin).
In about:config, set signon.autologin.proxy to true. The other settings given in the blog entry had no effect.

Now I wonder whether there is a generic solution for all browsers, or at least for IE.


I think this is NTLM authentication. (I might be wrong)

If you are using Firefox, try using the plugin called "Integrated Authentication for Firefox". You can search it in Firefox Add-on Manager.

The website is here: https://code.google.com/p/firefox-ntlmauth/

  • Thanks but that didn't work. Installed the add-on but the same prompt appears (I may be doing it wrong) The website is blocked at work, I'll check it out at home later today. – Indivara Aug 19 '13 at 7:23
  • Apparently it is basic authentication. Found details here: ietf.org/rfc/rfc2617.txt – Indivara Aug 19 '13 at 13:20

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