Due to a vulnerability to the security flag in the ipv4 header, we will be taking uki-scotgrid-glasgow offline today for an upgrade. In order to minimise downtime we shall be rebooting all worker nodes simultaneously rather than draining queues.
We aim to have this work completed by 12:00 midday today.
Please see RFC 3514 for more details. We advise other sites to perform this upgrade asap.