Server 2003 R2, adding IIS, and you can't log in!
You've just done a clean install of Server 2003 R2, added
IIS and you can't logon to administer the site. (The site you've installed, and
paid for. And Bill won't let you. Bill!)
Isn't that so frustrating. There's more to life than
configuring servers! Things like writing you own applications and running them!
Here's the problem..
This issue occurs if you install Microsoft Windows XP
Service Pack 2 (SP2) or Microsoft Windows Server 2003 Service Pack 1 (SP1).
Windows XP SP2 and Windows Server 2003 SP1 include a loopback check security
feature that is designed to help prevent reflection attacks on your computer.
Therefore, authentication fails if the FQDN or the custom host header that you
use does not match the local computer name.
Here's the answer...
Currently there's a link
I'll copy past the guts of it here - before Bill changes
You receive error 401.1 when you browse a Web site that
uses Integrated Authentication and is hosted on IIS 5.1 or IIS 6
When you use
the fully qualified domain name
(FQDN) or a custom host header
to browse a local Web site that
is hosted on a computer that is
running Microsoft Internet
Information Services (IIS) 5.1
or IIS 6, you may receive an
error message that is similar to
HTTP 401.1 - Unauthorized: Logon Failed
Follow these steps:
regedit, and then
Registry Editor, locate
and then click the
following registry key:
Lsa, point to
New, and then
and then press ENTER.
and then click
Value data box,
1, and then click
Registry Editor, and
then restart your
There is another method that's more secure described in