When I set up sharePoint 2013 web application I use this line of script

Add-DnsServerResourceRecordCName -HostNameAlias spdev.dev.com -Name portal -ZoneName dev.com
  • spdev - name of pc
  • dev.com - domain
  • portal - site adress

now I have 2 sites

  • CA - http:/spdev:8080
  • Team site - http:/portal

If I use IE all works fine, but in firefox I cannot log in to the team site. I see authentication form, I put correct credentials, then click log in button and see authentication form again.

How can I solve this issue?

2 Answers 2


Here's what worked for me. I had made all of the usual disable loopback check setting changes in the registry, or so I thought.

I had HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0\BackConnectionHostNames set to include (one per line):


IE authentication to the host header-enabled sites worked, but Firefox kept prompting me for credentials over and over. Once I changed that setting to


Firefox authentication started working fine. So it appears that IE needs the fully qualified domain name, and Firefox likes just the host header name. For the disable loopback check settings instructions, look here.

  • it wont work for my shp foundation 2013 and Firefox 55 I spend whole day changing settings for ntlm in ff and dosent work at all Commented Sep 18, 2017 at 23:11

Can you possibly enable NTLM authentication with Firefox core configuration. You can give this article a try.

It should work.

  • Yes, it doesn't work in my case (
    – Alexander
    Commented Dec 3, 2012 at 13:32

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