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IRIS

Instructional & Research Information Systems

Active Directory

Windows Active Directory

Sporadic Windows Authentication Errors

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Since Thursday, March 16, we have received some reports of Windows authentication errors, usually experienced during login to Windows after a fresh reboot or at the lock screen. A common error indicated “The trust relationship between this workstation and the primary domain failed.” Temporarily disabling the network, when possible, allowed one to login as normal (using cached credentials).

We found some Active Directory replication issues that may be at fault, and are working to rebuild one of our domain controllers. If you encountered the above error after 3pm today, March 21, please feel free to notify help@eecs with any specifics.

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Update to Domain Controller Group Policy

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We are implementing an update to Group Policy that affects our Windows Domain Controllers this morning at 10am. No impact is expected on end users, but we are mindful that a similar change last week caused an unexpected problem with LDAP-auth (see https://iris.eecs.berkeley.edu/news/resolved-incidents/eecs-ldap-logins-not-working/).

This update improves the security profile of our Domain Controllers. In particular, we are removing explicitly-listed Null Session Named Pipes, as is best practice.

Power Failure in Soda Machine room 11:40am Dec 20

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Contractors attempting to repair the UPS in our primary machine room tripped a breaker which disabled most IRIS services. Service has been mostly restored as of around 2:05pm.

The lists.eecs.berkeley.edu mailing list server is still being rebooted but should be back shortly.

Resolved as of 2017-12-20 14:07:00

Campus losing power, IRIS services shutting down

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Due to a fire threatening our transformers, PG&E has advised campus we will be losing power.

IRIS is taking proactive steps to shut down as much equipment safely before we totally lose power.

See https://www.nixle.us/9HHZX for the warning from UCPD.
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UPS Installation/Various System Outages

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Delivery is expected Monday for our new UPS which will be installed in the 290 Soda Hall server room. Some services will be down for short periods on Tuesday while they are moved off of room power and onto temporary power. Later in the week, there will be a second outage while those machines are moved onto the new UPS. Additionally, there may be a longer outage of our storage systems while some upgrades are done.

While I realize that this post is somewhat vague, a lot depends on exactly when the UPS is delivered and how long it takes to install it. I will be posting more refined notes to narrow down the scope of what services will be out (and when) as time goes on.

While we realize that there may be some inconveniences for some, please bear with us as we strive update our services and minimize outages for the future

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December 28th Shutdown

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IMAP/mail, home/project, Windows services (AD/WINS/printing), LDAP/NIS/DNS, DHCP and most other IDSG and IMG services will be affected. We will try to keep some basic network services running (DHCP, DNS/NIS), possibly in a reduced capacity.

While EECS-Secure, EECS-Guest and EECS-Open wireless LANS will be out of service during this time, the EECS and AirBears wireless LANS will remain operational during the outage.

The reason for this extended downtime is multi fold. The first is to repair the UPS that failed a couple of weeks back. The repaired unit will be placed back on line and extensive testing must be done to ensure it’s operation before we can depend on the UPS again. The second is to move data around which will allow us to remove from service a piece of software used to manage storage. This software is no longer under development and we need to remove our dependency on it. Lastly, some routine maintenance will be done which can only be done when systems are down. These are the kind of things that can only be done between semesters and we ask for you understanding during this disruption in service.

While the stated outage is from 10:00AM to 9:00PM, it may not take that long. This is a worst case scenario. If possible, services will be brought up sooner than 9:00 PM.
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