We have been informed by our provider that there will be planned maintenance on network equipment supporting our servers on the 27th and 28th of November. The first maintenance window is on November 27th from 2:30 AM UTC to 3:30 AM UTC. This affects our backup server. Users may see slower webpage loading times for certain web pages. Host computers connecting to BOINC should not be affected. The second maintenance window is on November 28th from 3:30 AM UTC to 4:30 AM UTC. This affects our main server, which will be unreachable while the maintenance is occurring. The website will be down and your computers will not be able to receive or send BOINC tasks. Fortunately, there are no challenges scheduled on those days. Other services, such as the Private GFN Server, The Science Cloud, and T5K are not affected since they are hosted elsewhere.

Source