24 July, 15:45: The second ACN Firewall was reinstated at approximately 12:30 today and we are now operating at full resilience. We believe the outage was caused by a fault in the physical link between the two firewalls. We are now investigating the cause of the broken link.

24 July, 10:40: CamSIS, CHRIS, CUFS, Moodle, ESS, the Research Dashboard and other services affected by the firewall issues yesterday are now operating normally. Information for IT officers: Investigations continue into the issues with the ACN Checkpoint Firewalls that caused service disruptions on 21 and 23 July. We are operating a full service, albeit with no resilience. A further update will be issued at 15:45 today.

The Managed Wiki Service will be unavailable between 07:15 and 09:00 on Wednesday 25 July while software upgrades are applied. Any queries about this should be directed to the [UIS Service Desk](https://www.uis.cam.ac.uk/service-desk). Please note that further maintenance notices and status updates about this service will be sent via the [IT Service Status system](https://status.uis.cam.ac.uk/). Log in and subscribe to receive notifications about this service and others.

There is currently an ongoing incident with the ACN firewall configuration which has been affecting services this morning. The two firewall instances are not syncing correctly resulting in some services, including CamSIS, CUFS, CHRIS, Moodle, ESS, the Research Dashboard and the IT Service Status dashboard, being temporarily unavailable this morning. To mitigate further service downtime, we have disabled one instance of the firewall until the problem can be diagnosed. We are in contact with our support partner to rectify the issue. We will issue an update tomorrow, or earlier if further information becomes available.

Extent: Power management for hosted servers at sby.colo.csx.cam.ac.uk Impact: Service unavailable for some or all of the period We will apply operating system patches to the server that provides the user interface to the power distribution system for the hosted server service in the Soulsby Building. This means that managers of hosted servers in the Soulsby Building may not be able to turn their power outlets on or off during this time. Hosted systems themselves will be unaffected, as will power control for servers in the Roger Needham Building.

Extent: Certain online forms for user administration. Impact: The forms will be unavailable for some or all of the above period. We will be updating the OS on the server that provides certain forms for applying for new services. This will mean that these forms will not be available, and that the contents of part-filled forms may be lost.

There will be a reduced service from the UIS Service Desk from 13:00 onwards on Thursday 19 July because of a UIS staff function. Normal service will resume on Friday morning. Apologies for any inconvenience caused. If you have any queries or concerns, please contact the [Service Desk](https://www.uis.cam.ac.uk/service-desk) in advance.

Extent: Power management for hosted servers at rnb.colo.csx.cam.ac.uk Impact: Service unavailable for some or all of the period We will apply operating system patches to the server that provides the user interface to the power distribution system for the hosted server service in the Roger Needham Building. This means that managers of hosted servers in the Roger Needham Building may not be able to turn their power outlets on or off during this time. Hosted systems themselves will be unaffected, as will power control for servers in the Soulsby Building.

Extent: The Moodle Virtual Learning Environment (VLE) will unavailable to all users during this period as Moodle will be upgraded from version 3.2 to 3.4. Further details about the upgrade can be found at www.uis.cam.ac.uk/moodleupgrade

Extent: The Unix Support mirror server, nfs-, www-, ftp-, and rsync-uxsup.csx Impact: Service unavailable The service will be unavailable for some or all of this period while the underlying operating system is patched.

Jackdaw Database Services (including IP registration database) will be unavailable between 16:45 and 17:15 on Wednesday 27 June, Routine OS security and kernel patches being applied.

Extent: MCS Linux remote-login services; DS-Filestore SFTP service. Impact: Each server will be rebooted. The MCS Linux remote-login servers and the DS-Filestore SFTP service will each be unavailable for several minutes between 17:30 and 19:00hrs for emergency works to cancel and replace an encrypted administrative key that was inadvertently exposed.

An operating system crash in THUNDERBIRD-1, one of two servers that provides the linux.ds.cam.ac.uk Remote Login service, caused that machine to stop functioning this afternoon at 1223hrs. We have rebooted the machine, and it is now functioning again as before as of 1318hrs. However, any processes that were running on it at the time of the crash have been lost. We apologise for the disruption, and will try to prevent this error from happening again.