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After upgrade to FireFox 30, we can no longer access internal websites. It gives us 401 - Unauthorized: Access is denied due to invalid credentials.

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  • Last reply by philipp

gokussl
gokussl
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This is happening on our internal websites that used to prompt a window to enter your credentials. This is no longer happening.

It just immediately gives us a

401 - Unauthorized: Access is denied due to invalid credentials. You do not have permission to view this directory or page using the credentials that you supplied.

This is happening on our internal websites that used to prompt a window to enter your credentials. This is no longer happening. It just immediately gives us a 401 - Unauthorized: Access is denied due to invalid credentials. You do not have permission to view this directory or page using the credentials that you supplied.

Chosen solution

hello, this might be due to the disabling of certain insecure authentication protocols in firefox 30: https://www.mozilla.org/en-US/firefox/30.0/releasenotes/#whatsnew

you can try to enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named network.negotiate-auth.allow-insecure-ntlm-v1. double-click it and change its value to true.

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philipp
philipp
  • Moderator
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Chosen Solution

hello, this might be due to the disabling of certain insecure authentication protocols in firefox 30: https://www.mozilla.org/en-US/firefox/30.0/releasenotes/#whatsnew

you can try to enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named network.negotiate-auth.allow-insecure-ntlm-v1. double-click it and change its value to true.