Coscine

Following the widespread disruptions on June 22, 2026, the central data center Core L2 switch must be updated. The update is scheduled to take place during this period with very brief interruptions (<10 seconds).

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:00 and 09:30.

To resolve the current issues, maintenance work will be performed today between 4:30 p.m. and 5:30 p.m. During this time, there will be a service interruption affecting most of the services at RWTH for approximately 10 minutes. Please take this last-minute announcement into account when planning your work.

The work has been completed, and the issue has been successfully resolved.

We're currently experiencing authentication issues that are affecting several internal services, including SSO (Shibboleth) login. Our service desk email is also impacted, so enquiries may not reach us at the moment — we're working to resolve this and apologise for the inconvenience.

Partial outage has been resolved.

Login via RWTH Single Sign-On (SSO) is currently disrupted. As a result, it is not possible to log in to any connected services.

There is currently a widespread disruption affecting, among other things, the SSO, though not limited to it. The root cause analysis is still underway.

Most of the services are currently up and running again. The analysis is ongoing. We cannot rule out the possibility of further outages.

Most of the services are up and running again. Please note, however, that the underlying issue has not yet been resolved, and disruptions may therefore continue to occur.

Explanation Following the Outage:
On June 22, 2026, starting at 9:00 a.m., there was a widespread outage affecting our services, which primarily impacted the RWTH Single Sign-On but was not limited to it. By around 12:00 p.m., the situation had largely stabilized, allowing users to log in via RWTH Single Sign-On again; however, other issues (e.g., with the IT Center ticket tool and RWTHmoodle) persisted. On the same day, between 4:30 p.m. and 5:00 p.m., the data center firewall was rebooted, which resolved the remaining issues. The disruption was caused by problems with the data center core switch. To ensure a lasting improvement in the situation, maintenance on the affected system was successfully carried out on June 30, 2026.

There may currently be issues logging in via RWTH Single Sign-On (SSO).
This is because a new certificate has been active in the metadata since 9:30 a.m. today.
The relevant department has been notified and is working with the system operators to resolve the issue.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:40 and 09:10.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 07:38 and 08:08.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:19 and 12:49.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:28 and 15:38.

Im angegebenen Zeitfenster werden die beiden redundanten Datacenter Core-Router gegen leistungsfähigere Router ersetzt. Da der Austausch wechselseitig erfolgen kann, ist dieser unterbrechungsfrei geplant.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 11:28 and 11:58.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:29 and 08:59.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:21 and 08:51.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:32 and 10:02.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:47 and 09:17.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:15 and 08:45.

Aufgrund eines Netzwerkausfalls ist die Replizierung des Clusters gestört. Wir arbeiten an der Behebung des Problems.

Die Störung ist behoben.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 07:21 and 07:51.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 17:20 and 17:50.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:06 and 09:36.

This is a test message

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:22 and 08:52.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 16:05 and 16:35.

Due to the replacement of central switches in the data center at the Seffenter Weg and Wendlingweg locations, there may be brief outages of the services operated in the data center between 4 p.m. and 7 p.m., or 10 p.m. at the latest.

As a result, authentication for Wi-Fi and VPN will also be temporarily unavailable, meaning that logging into Wi-Fi (eduroam, RWTH institutes, RWTH devices) and all VPN areas may be temporarily disrupted.

The maintenance will also affect various IT Center services, which may also experience brief outages. This message has been extended to the affected services.

Die Wartung wurde erfolgreich beendet.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 16:40 and 17:10.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:18 and 15:48.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:09 and 08:39.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 16:59 and 17:29.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:24 and 08:54.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 11:08 and 11:38.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:58 and 13:28.

Currently, there is a problem whereby metadata cannot be loaded or edited in a Coscine resource. However, the metadata is still stored in the background and has not been lost, and files can still be described with metadata and uploaded. We are working on a solution. Due to the holidays, the problem will not be fixed until after Christmas.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:12 and 08:42.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:58 and 12:59.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:55 and 12:55.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:49 and 12:49.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:42 and 12:42.

Due to an ongoing maintenance, Coscine will be temporarily unavailable.

Problems may currently arise when creating new DataStorage.nrw resources in Coscine. When creating a DataStorage.nrw resource, either the University of Cologne/University of Paderborn or the RWTH/University of Duisburg-Essen locations are randomly selected in the background for the creation of the storage bucket. The problem occurs for buckets at the University of Cologne / University of Paderborn. If you encounter this error, please try again to create a resource, as the selection of the location pair for resource creation is random.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 11:39 and 12:09.

Currently, the Coscine website cannot be accessed and an internal error (500) occurs. The development team is already working on a solution.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:53 and 09:23.

The system is currently undergoing maintenance on September 11 from 9:30 to 13:30 CEST. A critical update is being applied. The service is offline and unavailable during this time.

Our machines are undergoing a short upgrade and Coscine will be unavailable for a short period of time. Thank you for your patience.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:38 and 10:08.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 13:53 and 14:23.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:51 and 10:21.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 13:02 and 13:32.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:17 and 15:47.

The Institutional login currently has issues, the problem has been reported to the KIT and is being worked on. Alternative login methods - ORCiD and Shibboleth (SSO) - are still working as expected.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:14 and 12:44.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 13:22 and 13:52.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:14 and 12:44.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:22 and 15:52.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 14:21 and 14:51.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 11:09 and 11:39.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 16:10 and 16:40.

There are currently disruptions to RWTH Single Sign-On. After entering your login details, the screen loads and then an Internal Server Error appears. This affects all services that use the RWTH Single Sign-On login.
The specialist department has been informed and is working to resolve the issue.

The problem has been fixed.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 14:14 and 14:44.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:53 and 09:23.

For some users, entries in the metadata view may currently not be displayed temporarily. Your metadata is secure and we are already working on a permanent solution. If you urgently need access to your metadata, please contact servicedesk@rwth-aachen.de.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:23 and 15:53.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:48 and 10:18.

During this period, the routing of the previous XWiN routers (Nexus 7700) will be switched to the new XWiN routers (Catalyst 9600). These routers are essential for RWTH's network connection. This changeover also requires the migration of the DFN connection, which is switched redundantly to Frankfurt and Hannover, and the RWTH firewall to the new systems.
There will be complete or partial outages of the external connection during the maintenance window. All RWTH services (e.g. VPN, email, RWTHonline, RWTHmoodle) will not be available during this period. The accessibility of services within the RWTH network will be temporarily unavailable due to limited DNS functionality.

Der Uplink nach Frankfurt wurde erfolgreich auf das neue System geschwenkt.

Umbau des Uplinks nach Hannover beginnt.

Uplink nach Hannover auf das neue System umgezogen.

BGP v4/v6 nach Frankfurt und Hannover sind nun über die neue Routern funktional.

Es stehen noch ein paar kleinere Nacharbeiten an.

Wartung ist abgeschlossen. Der Datenverkehr läuft nun vollständig über die neuen Router!

Problematik mit der Anbindung zur Physik identifiziert, Lösung erfolgt morgen früh.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 10:08 and 10:38.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:29 and 12:59.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 10:31 and 11:01.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:07 and 12:37.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 11:03 and 11:33.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 10:07 and 10:37.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:13 and 12:43.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 11:23 and 11:53.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:57 and 10:27.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:50 and 09:20.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:56 and 10:26.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:38 and 10:08.

There are currently restrictions when loading some resources and retrieving metadata profiles via the Metadata Profile Generator. We are working on a quick fix for the problem.

Störung wurde behoben

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:52 and 16:22.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 10:33 and 11:03.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:24 and 09:54.

This evening around 20:25 - 21:00 there was a performance low in the SSO service and was checked by the specialist department during this time. The problem has been solved and fast logins without waiting times are possible again.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:20 and 15:50.

Due to a current network issue, the RWTH-RDS (https:
coscine-s3-01.s3.fds.rwth-aachen.de:9021/) is currently only accessible within the RWTH network. Attempts to connect to the bucket using read or write credentials for resources of the type RWTH-RDS-S3 from external networks are resulting in timeouts. Our team is actively working on a solution. Thank you for your understanding; we will keep you updated on any progress.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:06 and 15:36.

Due to certificate issues, the connection to NRW-RDS-S3 resources is currently unstable. Users may experience intermittent connectivity issues, delays in accessing resources, or failed operations when interacting with the S3 system.
We are actively investigating the root cause and are working on resolving the issue as quickly as possible. We apologize for the inconvenience and will provide updates as more information becomes available.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 10:23 and 10:53.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:07 and 09:37.

We’re currently experiencing issues with Shibboleth login. Even if you log in successfully, you may encounter a “404 User Not Found” error. We’re working on a solution and appreciate your patience.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 10:03 and 10:33.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:25 and 09:55.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:10 and 09:40.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:47 and 16:17.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:20 and 12:50.

At the moment, single sign-on and multi-factor authentication are sporadically disrupted. We are already working on a solution and ask for your patience.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:04 and 09:34.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 08:53 and 09:23.

We are currently performing scheduled maintenance on our SQL database. Coscine will be temporarily unavailable for a short period. We apologize for any inconvenience and appreciate your patience.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:25 and 09:55.

Due to problems at the F5, services such as Coscine, RWTHmoodle or the entire login via the RWTH Single Sign-On are temporarily unavailable.

Störung von Seiten des Herstellers behoben

Due to problems with the load balancers (F5), the majority of services such as RWTHmoodle, RWTH Single Sign-On, RWTH E-Mail etc. and all services behind the RWTH Single Sign-On are disrupted.

A technician from the manufacturer has now also been called in to solve the problem.

The fault has been rectified. However, there may still be delays in delivery or receipt.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 17:00 and 17:30.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:21 and 15:51.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:40 and 10:10.

Currently the login of Coscine is temporarily disrupted, we are working on a solution. Reloading Coscine (several times if necessary) after logging in often leads to success.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 12:45 and 13:15.

Login via Shibboleth is currently disrupted. Coscine users can only log in via ORCID or NFDI4Ing-AAI. When logging in via ORCID or NFDI4Ing login without previously linked accounts, no linking can currently take place and no storage space can be used by default (100GB in web resources). If there is no link, it is therefore not possible to access projects that have already been created via the Shibboleth account. In case of urgent need, please contact the ServiceDesk (servicedesk@rwth-aachen.de). We are working on a solution.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:50 and 10:20.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 10:37 and 11:07.

The login to Cosicne is currently disrupted. We are working on a solution.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:08 and 09:38.

Due to the expired certificate for idm.rwth-aachen.de, no IdM applications and the applications that use RWTH Single Sign-On can be accessed.
We are working on a solution.
- An insecure connection message is displayed when calling up IdM applications.
- When calling up applications with access via RWTH Single Sign-On, a message about missing authorisations is displayed.

The certificate has been updated and the applications can be accessed again. Please delete the browser cache before accessing the pages again.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:31 and 10:01.

On September 10th beginning at 10 am, we will be conducting a maintenance to test a new login method. Service may be briefly interrupted throughout the day. Thank you for your patience and understanding!

Due to DNS disruption, the name servers of various providers are currently not returning an IP address for hosts under *.rwth-aachen.de.
As a workaround, you can store alternative DNS servers in your connection settings, e.g. the Level3-Nameserver (4.2.2.2 and 4.2.2.1) or Comodo (8.26.56.26 und 8.20.247.20). It may also be possible to reach the RWTH VPN server, in which case please use VPN.

Instructions for configuring an alternative DNS server under Windows can be found via the following links:
https:
www.ionos.de/digitalguide/server/konfiguration/windows-11-dns-aendern/
https:
www.netzwelt.de/galerie/25894-dns-einstellungen-windows-10-11-aendern.html
You can also use VPN as an alternative. If you cannot reach the VPN server, you can adjust the host file under Windows according to the following instructions. This will allow you to reach the server vpn.rwth-aachen.de. To do this, the following entry must be added:
134.130.5.231 vpn.rwth-aachen.de
https:
www.windows-faq.de/2022/10/04/windows-11-hosts-datei-bearbeiten/

The hosts of RWTH Aachen University can now be reached again from outside the RWTH network.

Individual users may have experienced problems even after the fault was rectified on 25 August at 9 pm. On 26.8. at 9 a.m. all follow-up work was completed, so there should be no further problems.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:54 and 16:24.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 13:56 and 14:26.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 15:20 and 15:50.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 09:18 and 09:48.

Due to an ongoing maintenance, Coscine will be temporarily unavailable between 07:14 and 07:44.