Vivek Agarwal’s Portal/Java Blog

An IBM Gold Consultant’s weblog about IBM, Lotus, WebSphere, J2EE, IT Processes, and other IT technologies

Unable to access a network share using Windows SSO?

Posted by Vivek Agarwal on June 27, 2008


We use an inexpensive NAS device from Iomega (StorCenter Pro 150d) in our office for personal/test server backups. This has been operational for more than a year with minimal to no issues. We had tied the device to our local Windows domain for user authentication and that was trivial to set up as well. Today, we started having issues with users being prompted to login when accessing the 150d as a network share even after logging in to the Windows domain, specifying their correct credentials, and immediately being prompted to login again. Obviously, not very functional!

Given that both our system administrators were out, I figured I would look into the issue. Initial thought was that a restart ought to do the trick – not quite so. Once I realized that the restart did not resolve the issue, I dug deeper and in a few minutes found an issue that I suspected was the root cause. Even though the 150d is part of our Windows domain, it does not appear to synchronize its time with the domain controller. So over the course of the year, its time had gotten badly out of whack with reality. I am not an expert in Kerberos security protocol (understatement of the year 🙂 ), but I figured that if the time difference between the 150d and the domain controller was large enough, then there was a strong possibility that the Kerberos service ticket presented by my laptop would be rejected by the 150d. I corrected the time on the NAS, restarted and tested access. Sure enough, that resolved the issue!

Nice! Yes, I know enough about a lot of things to be dangerous on all fronts! 😉

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2 Responses to “Unable to access a network share using Windows SSO?”

  1. My small company does not have the luxury of two dedicated IT people. Here are some of our Iomega 150d woes:

    http://ripul.blogspot.com/2008/07/iomega-storcenter-1tb-150d-woes.html

  2. business nas storage…

    […]Unable to access a network share using Windows SSO? « Vivek Agarwal’s Portal/Java Blog[…]…

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