CPK

Service interruptions

A CPK is C&CZ’s way of reporting a problem or service interruption. Follow the mailing list or RSS feed, and check the service interruptions page for live status updates.

A CPK is how C&CZ reports a problem or service interruption. We publish one when something goes wrong, when we need to do planned maintenance, or when we want to let you know about something that affects the services we run.

Note

What’s a CPK? CPK is short for the Dutch C&CZ Probleem Kaart — C&CZ problem card. The name is simply how we’ve always done it, and it has stuck with us ever since.

How to follow CPK messages

CPK messages are first sent to the CPK mailing list — you can (un)subscribe there. You can also follow the service interruption messages via RSS.

When a CPK takes longer to resolve, we publish updates on the service interruptions page.

University-wide interruptions

For Radboud University-wide service interruptions, see meldingen.ru.nl.

CPK#1443 PHP Security update

A major security vulnerability in PHP was discovered. As of 22 October 2026, our systems have been patched with the new releases. Status as of 2026-10-21 11:00:00 CET 21 October 2026 at 16:00 CEST the PHP team will release new versions, but exploitation attempts are already happening. There is no mitigation, all PHP sites that use “multi-part” file uploads are vulnerable. Only bringing sites off-line will help. We know that Wordpress sites are affected. So we are taking down all Wordpress sites that we host until an updated PHP version is released. ...

Resolved

July 2025

CPK#1393 Servers and services unavailable due to physical moving on August 7th

We will be moving servers from the serverroom ak008 (Huygens A-2.008) to other locations. A lot of services and virtual machines will be offline for a few hours while we disconnect, move and reconnect the hardware. Assuming everything goes well, the services should be up after turning the machines back on again. This CPK will be updated with more servers and information about affected services in the weeks before the move on August 7th 2025. ...

June 2025

CPK#1392 Network failure in part of network

There are servers unreachable due to an unknown problem with the 25Gbit network switch in room ak008. We don’t know the root cause yet. Update: rebooting the affected switch has resolved the problem. DOWN amanda22.science.ru.nl DOWN cephgrafana.science.ru.nl DOWN cephgw3.science.ru.nl DOWN cephgw4.science.ru.nl DOWN cephmon2.science.ru.nl DOWN cephosd07.science.ru.nl DOWN cephosd08.science.ru.nl DOWN cephosd09.science.ru.nl DOWN cephosd10.science.ru.nl DOWN cephosd11.science.ru.nl DOWN cephosd12.science.ru.nl DOWN cephosd13.science.ru.nl DOWN cephosd23.science.ru.nl DOWN cephosd26.science.ru.nl DOWN cephosd27.science.ru.nl DOWN chemotionvm.science.ru.nl DOWN containervm02.science.ru.nl DOWN dockervm01.science.ru.nl DOWN dockervm02.science.ru.nl DOWN dockervm03.science.ru.nl DOWN ds3-huyg.net.science.ru.nl DOWN elabrolabvm.science.ru.nl DOWN filemakervm.science.ru.nl DOWN home3.science.ru.nl DOWN jupytervm.science.ru.nl DOWN mariavm02.science.ru.nl DOWN mossvm.vm.science.ru.nl DOWN rootcell.science.ru.nl DOWN vmhost03.science.ru.nl DOWN vmhost04.science.ru.nl DOWN vmhost07.science.ru.nl DOWN zammad3.vm.science.ru.nl

CPK#1391 Planned network disruption on some server networks

Services on networks that are currently behind our old picos switches will be transferred to be behind our firewalls. This may take a few minutes of downtime due to the changes needed for moving the gateway functionality. If all goes well, it will be one period of a few minutes, if we need to roll back and fix things, there may be a repeat downtime. All went well, there was a few minutes of interruption on the cncz homepage due to ARP caching issues.

CPK#1390 Authentication downtime

Following the recent update of our LDAP servers certificates, multiple users have reported authentication failures when attempting to log in via RADIUS. The issue appears to affect only users with RADIUS-based authentication, while LDAP-based authentication continues to function successfully. Affected users typically include HFML technicians, guest console users, and Science logins with Wi-Fi access.

May 2025

CPK#1389 Servers unreachable

In the transition from the older 25Gbit switches to newer switches, two blocks of 4 connections were temporarily unavailable due to a peculiarity of the switches where ports are operated in blocks of 4. The removal of an unused cable triggered a disabling of the other ports in the bunch, reseating one of these connections in one case and re-inserting the unused cable fixed the block of ports to start working again. ...

CPK#1388 /vol/astro2 and /vol/astro5 unavailable

Due to errors on the /vol/astro2 filesystem, we had to reboot the fileserver comas1 and take it offline to perform repairs. During this process, both /vol/astro2 and /vol/astro5 have been unavailable.

CPK#1387 /vol/astro6 and /vol/astro7 unavailable

Due to errors on the filesystem /vol/astro7, we had to reboot the fileserver comas2, and take in offline to run repairs on the filesystems. During those repairs /vol/astro7 and /vol/astro6 are not available. Last time this happend it took 24 hours to complete

April 2025

CPK#1386 Gitlab/Mattermost/Pages offline after package updates

After the package for gitlab was updated, the service did not come up again, due to a problem with post-install scripts. After rebooting the package installation could finish and service was restored.

CPK#1385 DHCP on 25Gbit not working

Due to a change in the network setup the dhcp servers for the 25 gbit networks (which are being changed to new switches and a new management method) the dns servers were unreachable by the dhcp servers. This caused the dhcp servers to be unable to resolve the names in the configuration to their ip addresses. It was fixed by a change in the central firewall.

January 2025

CPK#1384 ubuntu 20 docker broken

A package upgrade broke the internal networking on our ubuntu 20.04 docker container VMs. Internal name resolution does not work anymore.