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Proxy Authorization Required. Firefox does not ask for a proxy username and password.

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  • 24 have this problem
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  • آخر ردّ كتبه bruce.hodge

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I am using firefox on mac with manual proxies and have provided the proxy address and port. I have set the proxy in Firefox->Preferences->Advanced->Network. This proxy requires authentication But firefox does not prompt me for credentials of this proxy. It just throws a page that says "Proxy Authorization Required" and "Description: Authorization is required for access to this proxy"

I have tried the following to no effect. 1) Clearing all the profiles in ~/Library/Profiles folders 2) Clearing profiles.ini file. 3) Setting the proxy along with username and password in System preferences and make firefox use system proxies instead of manual proxies.

Right now I am downloading firefox 13 beta to see if this solves the problem. Any workaround available for FF12.0?


Any help is greatly appreciated.

Thanks.


EDIT:: Tried with FF 13 beta. Same problem

Modified by Sanjay

Chosen solution

I managed to solve this one. Just set the following values to false in about:config.

  1. network.automatic-ntlm-auth.allow-proxies
  2. network.negotiate-auth.allow-proxies

Hope this helps someone out there :).

Read this answer in context 👍 14

All Replies (4)

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Chosen Solution

I managed to solve this one. Just set the following values to false in about:config.

  1. network.automatic-ntlm-auth.allow-proxies
  2. network.negotiate-auth.allow-proxies

Hope this helps someone out there :).

Modified by Sanjay

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The problem still exists in FF15 on the MAC. The ntml fix works, but it would be nice if it worked out of the box. Is there a way to make the change and package FF up for redistribution with network.automatic-ntlm-auth.allow-proxies = False ?

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Use a mozilla.cfg file in the Firefox program folder to lock prefs or specify new (default) values.

Place a file local-settings.js in the defaults/pref folder where you also find the file channel-prefs.js to specify using mozilla.cfg.

pref("general.config.filename", "mozilla.cfg");
pref("general.config.obscure_value", 0); // use this to disable the byte-shift

See:

You can use these functions in mozilla.cfg:

defaultPref();  // set new default value
pref();         // set pref, but allow changes in current session
lockPref();     // lock pref, disallow changes
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Thanks Cor-el, A little more info if anyone is trying to fix the original bug. If the Blue coat proxy is set to authenticate via LDAP it works no problem. If the blue coat is set to IWA and use AD it doesn't work. The browser is either having issues with the hand over from one auth method to the other or it doesn't like the AD method????