IIS user credentials caching

From: Nayden Kolev (naydencho_at_HOTMAIL.COM)
Date: 11/29/03


Date:         Fri, 28 Nov 2003 18:42:48 -0500
To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM

Hello All,

Here is something I noticed on a Windows Server 2003 Enterprise... (it seems
it is also true for older versions of Windows Server and IIS)

I tested this on a newly installed Windows Server 2003 Enterprise (the
server is not in a domain.) I have a simple FTP site configured on the
server. The site is configured to NOT allow anonymous connections, only
"Windows Integrated" and I have a few user names created locally on the
server. I set passwords for those, and tried logging on. All is good.

Then I reset the password of one of the users and tried logging on with the
new password - did not work! I tried with the OLD password and it DID work!
I tried that a few more times, same result.

After some trial and error testing I found out that the password change
takes effect after approximately 15 min, sometimes even longer. It seems to
take effect immediately if you restart IIS. Also, disabling the account has
the same end result behavior as resetting the password - you can logon with
that account for 15 min after disabling it.

I would think stuff like that would/should take effect immediately,
especially as the accounts are local and there is not AD sync to take effect
(even those are almost immediate...)

I found some info on it (although my testing showed slightly different
results) in KB210992 - apparently this is "by design"...

So, I just thought I'd mention it...

Nay

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