Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

OS X Lion: NTLMv2 Authentication appears to be broken in Firefox 5.0.1

  • 2 replies
  • 45 have this problem
  • 44 views
  • Last reply by hqasem

hqasem
hqasem

I just upgraded to OS X Lion, and when I went to work, I noticed that Firefox 5.0.1 stopped connecting to the Internet.

It refused to connect me through the corporate proxy (MS ISA + NTLMv2 Auth). After repeated attempt, it would sporadically connect me to http sites but NEVER https sites.

If you need further information, please let me know.

-hq

I just upgraded to OS X Lion, and when I went to work, I noticed that Firefox 5.0.1 stopped connecting to the Internet. It refused to connect me through the corporate proxy (MS ISA + NTLMv2 Auth). After repeated attempt, it would sporadically connect me to http sites but NEVER https sites. If you need further information, please let me know. -hq

Chosen solution

I got this to work.

using about:config

Changed networ.negotiate-auth.allow-proxies from TRUE to FALSE.

http://kb.globalscape.com/KnowledgebaseArticle10522.aspx

Read this answer in context 👍 6

All Replies (2)

drewmaness
drewmaness

Chosen Solution

I got this to work.

using about:config

Changed networ.negotiate-auth.allow-proxies from TRUE to FALSE.

http://kb.globalscape.com/KnowledgebaseArticle10522.aspx

hqasem
hqasem Question owner

Thanks drewmaness.

Confirmed. It works now after setting network.negotiate-auth.allow-proxies to False.

-hq