The problem has been solved.

-----------------

Today, Tuesday, March 17, 2026, since approximately 9:00 a.m., there has been an interruption in the external internet connection in some buildings.

We are working to resolve the issue.

Trouble caused by: Failure of a WAN Router

more information about this entry

Today, 06.03.2026, between 11:15 AM and 12:00 PM, there were issues with hostname resolution (DNS). As a result, in some cases, it was not possible to access websites or connect to computers using their hostnames.

Trouble caused by: Still under investigation

The problem has been solved.

-----------------

As of today 06.03.2026, password changes in the DESY Registry (https://registry.desy.de) are not possible.

We are working on a solution to this problem.
more information about this entry

The problem has been solved.

-----------------

Today, Thursday, 05.03.2026, the GO-Portal (https://go.desy.de/portal) is only available to a limited extent. All GO workflows are affected, including absence, vacation, payroll, and business trips.

Trouble caused by: Problem of a database file

more information about this entry

The problem has been solved. All changes that were triggered in the Registry during the disruption have now been processed.

If there are still occasional issues with passwords, a repropagation of the password may help. For more information, please refer to:
https://it.desy.de/services/registry/password_change -> 'Transmit password to other systems (Repropagate Password)'.

-----------------

Since today, Montag, 2.3.2026, 10:00h the central service of the Registry has been experiencing problems.

Newly set passwords are currently not being passed on to the connected services.
Therefore, it is currently not possible to log in to different systems after changing your password.

We are working on a solution with highest priority.

As soon as we have more detailled information about the impacts or the problem has been solved, we will inform you about it.

Trouble caused by: Database internal Problems

more information about this entry

The problem has been solved.

-----------------

Since Tuesday, 24.02.2026, printing from SAP is partially disturbed

We are working on a solution to this problem

Trouble caused by: Technical issues arose during necessary changes and the replacement of print servers

more information about this entry

Today, Mittwoch, 25.2.2026 the on-site service of the UCO in room 02b/131d is not staffed.

Support via telephone (5005) and email (uco@desy.de ) is available as usual.

Trouble caused by: Unscheduled absences

The problem has been solved.

-----------------

Since Tuesday, 24 February at 00:00, parts of the network have been unavailable or only partially available. As a result, there may currently be limitations in the accessibility of services.

We are working on a solution with highest priority.

The disruption is caused by increased computing activity, which has led to an overload of parts of the network.

Trouble caused by: Band width - has been increased

more information about this entry

The problem has been solved.

-----------------

Since today, Thursday, February 19, 2026, at approximately 9:00 a.m., there have been problems accessing IT services with VPN (CISCO Anyconnect).

We are working on a solution of this problem.

Trouble caused by: unknown

more information about this entry

The problem has been solved.

-----------------

oday, Thursday, 19.02.2026 from approx.6.00h until 9.00h a login on the SAP productive system was not possible.



Trouble caused by: Authentication Problem

The problem has been solved.

-----------------

Since maintenance was completed, there are unfortunately still unresolved issues with the availability of central IT services via IPv6. This affects email and external access via bastion.desy.de. The issued is currently being worked on.

--

On Dienstag, 17.2.2026 between 6:00h and 08:00h the central firewall will be maintained.

If everything goes according to plan, there will be no interruption or only a very short interruption (a few seconds) to the connections between the Internet, DMZ, and intranet.

Trouble caused by: Hardware Failure and a Software Bug

more information about this entry

The problem has been solved.

-----------------

Since today, Thursday, 12.02.2026, some IT services are disturbed. Among others, the Linux management tool Puppet and the version control system GitLab (https://gitlab.desy.de) are affected.

Additional services may also be affected. The exact scope of the disruptions is currently not known.

We are working on a solution to this problem.

Trouble caused by: Problem in der Virtualisierungs-Infrastruktur

more information about this entry

Today, Mittwoch, 11.2.2026 the on-site service of the UCO in room 02b/131d is not staffed.

Support via telephone (5005) and email (uco@desy.de ) is available as usual.

Trouble caused by: Unscheduled absences

The problem has been solved.

-----------------

The problem has been solved.

-----------------

Since today, 4.3.2026 approx. 10.30 h it is not possible to log in to the web analytics tool Matomo. Therefore, editors of DESY websites are currently unable to access web statistics via the Matomo analytics tool (https://matomo.desy.de).

Trouble caused by: Probleme mit einem Update

more information about this entry

The problem has been solved.

In some cases it might be necessary to renew the DESY-WLAN profile.
https://it.desy.de/services/networks/wlan_at_desy/desy/index_eng.html

-----------------

Since yesterday, Tuesday 3.2.2026, an issue with the Wi-Fi connection of the network 'DESY' exists under certain circumstances.
On affected devices it is not possible to log in to the DESY "WLAN".

The exact conditions under which the problem occurs are not yet known. However, different operating systems are affected.

The issue is still under investigation. We are working on a solution.
more information about this entry

On Tuesday, 03.02.2026, between 2:10 PM and 2:15 PM, a central Oracle database cluster (IT-RAC) was unavailable. As a result, some central database applications were temporarily inaccessible.

Trouble caused by: Issues with the Underlying Storage System (NetApp)

Between 6:40 p.m. and 7:35 p.m., there was a disruption to Cisco IP telephony. As a result, no calls could be made or received.

ISDN/analogue telephones were not affected by this problem and the technical emergency service was available.

Trouble caused by: Cisco IP telephony malfunction

Today, Monday 2.2.2026 between about 9:45h and 10:45h the web page www.desy.de was not available.

Trouble caused by: Problems in Backend Server, Details are under investigation

more information about this entry

Today, Monday, 02.02.2026 the on-site service of the UCO (02b/131d) is not staffed.

Support via telephone (5005) and email (uco@desy.de) is available as usual.

Trouble caused by: Limited staff availability due to strikes in public transportation.

On Wednesday, 28.01.2026 between 3:48 p.m. and 7:06 p.m., there was a temporary disruption in the availability of services via IPv6.

Only services that had not implemented IPv4 fallback (e.g., SSH access to Bastion) were affected.

Trouble caused by: Security updates with unexpected side effects

The problem has been solved.

-----------------

Since today, Tuesday, 27.01.2026, 13:00h, there has been an issue with the Mathematica license server.

Due to the disruption, it is currently not possible to obtain licenses when starting Mathematica. Already running Mathematica applications will lose their licenses soon.

We are working on a solution.

Trouble caused by: Unexpected issues after server update

more information about this entry

The problem has been solved.

-----------------

Today, Monday, January 26, 2026, the GO System sent empty emails at 10-minute intervals. The problem was resolved at around 10:00 a.m.

We apologize for any inconvenience caused.

Trouble caused by: Malfunction of a scheduled job

more information about this entry

The problem has been solved.

-----------------

Since today morning, 20.01.2026 the central Wiki service XWiki (https://xwiki.desy.de) isn't available due to a disturbance.

We are working on a solution.

Trouble caused by: Under investigation

more information about this entry

The problem has been solved.

-----------------

Currently, the web analytics tool Matomo is unavailable. Therefore, editors of DESY websites are currently unable to access web statistics via the Matomo analytics tool (https://matomo.desy.de).

Trouble caused by: Issues caused by previous updates

more information about this entry

The problem has been solved.

-----------------

Currently, initial registration for Jabber is only possible using Cisco VPN.
Initial registration is required if you have never logged into the service before or you have reset your Softphone and need to log in again.

If you are already logged into the Jabber Softphone, you can continue using the service seamlessly via eduVPN or from outside the DESY network.

We are working on a solution.
more information about this entry

The problem has been solved.

-----------------

Today, Monday, 12.01.2026 the on-site service of the UCO (02b/131d) is not staffed.

Support via telephone (5005) and email (uco@desy.de) is available as usual.

Trouble caused by: unscheduled absences

more information about this entry

The situation has since returned to normal, and Cisco VPN is now fully operational without restrictions.

-----------------

Due to the currently increased use of CISCO VPN, the central CISCO VPN service is temporarily reaching its technical limits. The number of assignable IP addresses from the corresponding address range is exhausted.

This becomes noticeable because connection attempts are rejected with the message "no assigned address".

Please use the alternatives eduVPN or an SSH tunnel as far as possible. Documentation for this can be found on the following websites:
https://it.desy.de/services/networks/vpn/eduvpn
https://it.desy.de/services/uco/documentation/external_access

As soon as fewer connections are established via CISCO VPN, the situation will ease accordingly, as IP addresses from the CISCO VPN address range will become available again.

If you have any questions, please contact the UCO (uco@desy.de, Tel: 5005).

Trouble caused by: Technical limit of available IP Adresses

more information about this entry

The problem has been solved. A connection to Jabber can now be established as usual again, even without Cisco VPN.

-----------------

Currently, there are restrictions when logging in to the Cisco Jabber softphone from outside. A connection to the Jabber phone service can currently only be established using a Cisco VPN connection.

We are working on a solution.

Trouble caused by: Change of Certificate

more information about this entry

The problem has been solved. XWiki is available again since about 09:30h.

-----------------

Since today, 7.1.2026 08:00h the central Wiki service XWiki (https://xwiki.desy.de) isn't available due to a disturbance.

We are working on a solution.
more information about this entry

The problem has been solved.

-----------------

Since today, Donnerstag, 4.12.2025, about 10:00 some central web sites with a login are not available.
Therefore it is not possible to view the contents of the affected web sites.

Work is already underway to resolve the issue.

Trouble caused by: Unknown

The problem has been solved.

-----------------

Since Thursday, 20.11.2025, the apps "Deck" und "Calendar" of the DESY Sync & Share storage service are unavailable.

We are working on a solution.

Trouble caused by: Issues with the frontend after updating the Sync & Share service

more information about this entry

The problem has been solved.

-----------------

Since Tuesday, 18.11.2025, there has been a disruption in the central backup system (TSM).

Backups cannot be created at this time, and it is also not possible to restore Unix or Windows files from TSM copies.

We are working on a solution.

Trouble caused by: Problems with the underlying infrastructure (SAN/FibreChannel)

more information about this entry

The problem has been solved.

-----------------

Since yesterday, October 28, 2025, at approximately 5:00 p.m., there have been problems with the QIP system (IP address management).

Aliases that were entered directly in the zones have been unavailable since approximately 5:05 p.m.

Affected are:
DESY and XFEL

As a result of the QIP problem, several emails could not be delivered to external recipients or even internal recipients.


In addition, this led to notifications being sent to mailing list administrators about undeliverable mail.

Trouble caused by: Unknown

more information about this entry

The problem has been solved.

-----------------

Since this week, delays have been occurring in the Windows software distribution (DSM), as the “DSM Shop” cannot be updated in some cases.

As a result, software approvals are currently taking longer than usual. The underlying cause appears to be high load on the responsible server – this is currently under investigation.

If you have any questions or urgent requests, please contact the UCO.

Thank you for your understanding.

Trouble caused by: High DSM server load

more information about this entry

Today, Thursday, 2025-10-16 between 10.45h and 11.00 h the usage of various central IT services was not possible. Login to the affected services was not or only partially possible.

Among others the following services are affected:
- Linux Log-in
- Log-in via Keycloak (SyncandShare, Mail)


Trouble caused by: Not known

The problem has been solved.

-----------------

Since today, Mittwoch, 15.10.2025, 08:00h the central service Printing is not available. Therefore it is not possible to print in several cases.

We are working on a solution with highest priority.

As soon as we have more detailled information about the impacts or the problem has been solved, we will inform you about it.

Trouble caused by: No connection to the print server

more information about this entry

The problem has been solved.

-----------------

The test system of the forms management system https://formsqua.desy.de is not available at the moment.
The problem is being investigated.
more information about this entry

The problem has been solved.

-----------------

Since today, Dienstag, 7.10.2025, 16:30h the central service Keycloak has an issue. Therefore it is not possible to log into services with multi-factor authentication. Existing session remain functional.

We are working on a solution with highest priority.

As soon as we have more detailled information about the impacts or the problem has been solved, we will inform you about it.

Trouble caused by: Issues with the new certificate

more information about this entry

The problem has been solved.

-----------------

Today, Friday, 26.09.2025 about 15 o'clock all CISCO VPN connections has been disconnected for security reasons and can not be reestablished for now.

As alternatives please use eduVPN or SSH Tunnel:
https://it.desy.de/services/networks/vpn/eduvpn
https://it.desy.de/services/uco/documentation/external_access

The affected users will be informed with a separate mail.

We are working on a solution.

Trouble caused by: Shut down of the CISCO VPN Gateway for security reasons

more information about this entry

The maintenance has been finished.

-----------------

On Donnerstag, 19.3.2026 between 08:30h and 11:00h the central Wiki service XWiki (https://xwiki.desy.de) won't be available due to maintenance works.

Maintenance caused by: Necessary Security Patches

more information about this entry

On Dienstag, 17.3.2026 from 06:00 to 09:00, maintenance work will be carried out on the Windows Software Distribution (DSM).

During this time, no DSM-based software installations will be possible. As well, de-, re- and post-installations are not possible during this time.

Maintenance caused by: Applying security patches

The maintenance has been finished.

-----------------

On Montag, 16.3.2026 between 08:00h and 09:00h the DOOR System (DESY Online Office for Research with Photons, https://door.desy.de) will not be available.

During this time period the database of the DOOR system will still be accessible for the DESY Gamma Portal (https://gamma-portal.desy.de).

Maintenance caused by: Software update

more information about this entry

On Wednesday, 11.3.2026 between 9:30 a.m. and 10:00 a.m., the central account management system DESY Registry (https://registry.desy.de) will only be available to a limited extent.

During this time, there will be an interruption of several minutes.
It will therefore not be possible to manage accounts or change passwords for existing accounts during this period.

The website https://passwd.desy.de will also be affected by the maintenance. During the interruptions, it will also not be possible to change passwords via this website.

The programming interface (REST API), which provides functions for connected systems (including DOOR and the EXFEL Registry), will also be unavailable during this time.

Maintenance caused by: Installing necessary security updates

On Tuesday, 10.3.2026 in the period of 11:00 and 12:00, maintenance of the Keycloak central login service takes place.

During this time, it is not possible to login to the following web services, among others:

- Indico (https://indico.desy.de)
- DESY Sync & Share (https://syncandshare.desy.de)
- DESY Mail (https://mail.desy.de)
- XWiki (https://xwiki.desy.de)
- Request-Tracker (https://rt.desy.de)
- GitLab (https://gitlab.desy.de)
- Jupyterhub (max-hub and naf-jhub)

Active connections will not be disrupted. Therefore, users who need the web services during the maintenance period should make sure to log in before the maintenance begins.

Important Notice: After maintenance, the login page of the service will look significantly different due to adjustments to the DESY design. How the login dialogue looks like after the change is already documented on the following web page:
https://it.desy.de/services/mfa/use_tokens

Maintenance caused by: Software-Update

more information about this entry

On Wednesday, 4.3.2026 from 06:00 to 09:00, maintenance work will be carried out on the Windows Software Distribution (DSM).

During this time, no DSM-based software installations will be possible. As well, de-, re- and post-installations are not possible during this time.

Maintenance caused by: Applying Security Patches

more information about this entry

The maintenance has been finished.

-----------------

On Wednesday, 25.2.2026 between 10h and 12h, maintenance work will be carried out on the Oracle APEX (Application Express) environment on the Oracle databases (IAM_DB, DESY_DB, BPM_DB) in order to install necessary security patches.

APEX is a service that can be used to develop and provide database-supported web applications.

During maintenance, the APEX development environment and all applications will be unavailable.
Each individual database is expected to experience an APEX outage of approximately 30 minutes.
In total, maintenance will take approximately 2 hours across all databases.
This applies ONLY to the APEX environments and applications on the individual databases.

Affected services:
IAM_DB: e.g. IAM, Risikomanagement, GrantCockpit, JAG u.a.
BPM_DB: e.g. the Reporting
DESY_DB: various Applications, listed here: https://it.desy.de/dienste/uco/aktuelles/liste_apex_anwendungen_auf_desy_db

As this is an infrastructure update, the subsequent necessary information of the users of these APEX applications is the responsibility of the APEX developers. More detailed information has been sent to the application developers by e-mail in beforehand. A separate e-mail was also sent to the IAM users.

Maintenance caused by: Installing necessary security updates

more information about this entry

The maintenance has been finished.

-----------------

Tomorrow, on Thursday, February 19, 2026, maintenance will be performed on the central firewall between 6:00 a.m. and 8:00 a.m.

If everything goes according to plan, there will only be a very brief interruption (a few seconds) in the connections between the Internet, DMZ, and intranet.

Maintenance caused by: Security updates to a central network component (firewall)

more information about this entry

On Montag, 16.2.2026 between 11:00h and 11:30h the DOOR System (DESY Online Office for Research with Photons, https://door.desy.de) will not be available.

During this time period the database of the DOOR system will still be accessible for the DESY Gamma Portal (https://gamma-portal.desy.de).

Maintenance caused by: Softwareupdate

The maintenance has been finished as planned.

-----------------

On Thursday, 12.02.2026, maintenance work will be carried out on the IT-News announcement service (https://it-news.desy.de) between 4:00 PM and 6:00 PM.

During this maintenance window, there may be a brief interruption of the service, during which the website https://it-news.desy.de will be temporarily unavailable.

Previously announced maintenance activities and disruptions can still be viewed also during the service interruption on the following webpage:
https://it.desy.de/dienste/uco/aktuelles

Maintenance caused by: Update of the Operating System

more information about this entry

The maintenance has been finished as planned.

-----------------

On Thursday, 12.2.2026 from 08:00 h to 16:00 h maintenance work will be carried out on the central e-mail service (mail.desy.de).

During the maintenance period there will be interruptions in access via the web interface (https://mail.desy.de). Access with Outlook or Thunderbird will be limited, too. Shared folders and calendars may not be accessible for a short time.

When composing emails, please regularly back up the current status in the Drafts folder to avoid data loss.

Maintenance caused by: Update of Zimbra to the up-to-date version.

more information about this entry

The maintenance has been finished at about 12 o'clock.

-----------------

On Donnerstag, 5.2.2026 the whole day maintenance works on all SYMPA mailing list servers will take place.

The following SYMPA instances are affected:

- DESY
- Belle2
- CSSB
- dCache
- XFEL

During the maintenance the web page of the respective Sympa servers won't be available for a longer time period. During the downtime of each server no emails will be distributed to the affected mailing lists.

All e-mails will be temporarily stored and distributed after the affected server is up and running again.

Maintenance caused by: Applying current security updates on the SYMPA servers.

more information about this entry

Today, Tuesday, 03.02.2026 between 18:00 and 18:30 the DESY guest printer service desyguestprint10 will not be available due to maintenance work. It can therefore not be used during this time to send print jobs to public printers.

Maintenance caused by: Maintenance of the Underlying Virtualization Platform

The maintenance has been finished.

-----------------

On Tuesday, 03.02.2026, from 08:00 am to 08:30 am, maintenance work will be carried out on the central PostgreSQL database service.

During this time, all existing connections to the database service and subsequently to connected IT services will be disconnected once.
The database itself will be accessible again after a short time (expected to be less than 1 minute).

It is recommended to terminate services and connections beforehand to avoid data loss.

Affected services include, but are not limited to:

- XWiki (https://xwiki.desy.de)
- DESY Chat (https://chat.desy.de)
- SYMPA Mailing Lists (https://lists.desy.de)
- EduVPN
- Central Login Service (Keycloak)
- Puppet

A complete list of affected services can be found on the following webpage:
https://ias-intern.desy.de/pls/r/apexkc/pgservices/home
(accessible only from the intranet)

Maintenance caused by: Apply security relevant updates

more information about this entry

On Montag, 26.1.2026 between 09:00h and 10:30h the DOOR System (DESY Online Office for Research with Photons, https://door.desy.de) will not be available.

During this time period the database of the DOOR system will still be accessible for the DESY Gamma Portal (https://gamma-portal.desy.de).

Maintenance caused by: Softwareupdate

On Dienstag, 20.1.2026 from 08:00 h to 15:00 h maintenance work will be carried out on the central e-mail service (mail.desy.de).

During the maintenance period there will be interruptions in access via the web interface (https://mail.desy.de). Access with Outlook or Thunderbird will be limited, too. Shared folders and calendars may not be accessible for a short time.

When composing emails, please regularly back up the current status in the Drafts folder to avoid data loss.

Maintenance caused by: Installation of security updates on the Zimbra servers

On Friday, 16.1.2026, the monthly Windows Updates will be released. Please install them on your DESY Windows devices as soon as possible to ensure that they are up-to-date and secure.

To do this, connect your Windows device to the internal DESY network after the updates have been released. Use VPN if you are extern. When prompted or at the end of the day, restart or shut down your Windows device.

Seven days after the release of the updates, a forced restart of the computers will take place if this has not taken place in the meantime.


Hint:

Next Wednesday, 21.01.2026, from 17:00 to max. 20:00, trouble-free working in the Windows environment cannot be guaranteed due to the monthly maintenance work on the central Windows servers.

It is recommended to log off or shut down DESY Windows devices on Wednesday before the maintenance starts. You should also log off from public Windows systems (terminal servers) beforehand.

Maintenance caused by: Windows updates and the monthly maintenance work on the corresponding central computers

more information about this entry

On Wednesday, 14.01.2026 between 08:30h and 11:00h the central Wiki service XWiki (https://xwiki.desy.de) won't be available due to maintenance works.

Maintenance caused by: Necessary Security Patches

On Dienstag, 13.1.2026, between 08:00h and 12:00h the central storage services DESY Sync & Share and EXFEL Sync & Share won't be available.

If you need data from storage areas of the service during the maintenance, be sure to download or synchronize them before the start of the maintenance.

The sync clients do not have to be switched off during maintenance. The data synchronization will be paused automatically and continue after the maintenance work.

Maintenance caused by: System Updates

The maintenance has been finished.

-----------------

Today, Monday, 12.01.2026, between 12:00h and 14:00h a part of the DESY websites (ZMS5) will temporarily not be available. It will also not be possible to edit the affected web pages during this time.
The following websites are affected by this maintenance:

https://desy.de
https://www.higgs10.de
https://lhc-deutschland.de
https://petra4.desy.de
https://www.pier-hamburg.de

Maintenance caused by: Security Updates

more information about this entry

The maintenance has been finished.

-----------------

On Montag, 12.1.2026 between 09:30h and 11:00h the DOOR System (DESY Online Office for Research with Photons, https://door.desy.de) will not be available.

During this time period the database of the DOOR system will still be accessible for the DESY Gamma Portal (https://gamma-portal.desy.de).

Maintenance caused by: Softwareupdate

more information about this entry

The maintenance has been finished. All affected services should be fully available again shortly.

-----------------

On Thursday, 08.01.2026, from 08:00 am to 09:00 am, maintenance work will be carried out on the central PostgreSQL database service.

During this time, there will be several short interruptions of the database service and, consequently, of the associated IT services.

It is recommended to terminate services and connections beforehand to avoid data loss.

Affected services include, but are not limited to:

- XWiki (https://xwiki.desy.de)
- DESY Chat (https://chat.desy.de)
- SYMPA Mailing Lists (https://lists.desy.de)
- EduVPN
- Central Login Service (Keycloak)
- Puppet

A complete list of affected services can be found on the following webpage:
https://ias-intern.desy.de/pls/r/apexkc/pgservices/home
(accessible only from the intranet)

Maintenance caused by: Apply updates

more information about this entry

The maintenance has been finished.

-----------------

On Tuesday, 13.1.2026, between 08:00h and 12:00h the central storage services DESY Sync & Share and EXFEL Sync & Share won't be available.

If you need data from storage areas of the service during the maintenance, be sure to download or synchronize them before the start of the maintenance.

The sync clients do not have to be switched off during maintenance. The data synchronization will be paused automatically and continue after the maintenance work.

Maintenance caused by: D'Cache Maintenance

more information about this entry

On Tuesday, 06.01.2026, between 4:00 AM and 8:00 AM, maintenance work will be carried out on the infrastructure components of the data center. This includes firmware upgrades, configuration adjustments for network components, and testing of power supplies. During this time, uninterrupted operation of IT services cannot be guaranteed, and short-term interruptions may occur.

From 6:30 AM to 7:00 AM, the main data center will be network-isolated for a functional test of the disaster recovery center. As a result, only backup services from RZ-3 (Building 3) will be available for the operation of the campus and control networks.

If the maintenance proceeds as planned, the following services will remain continuously available:
- Telephony
- WLAN
- VPN
- Central authentication services (LDAP & Kerberos)
- Oracle databases (read-only)
- Wired network (LAN)
- Internet connection (WAN)
- Network name resolution (DNS)
- IP address assignment (DHCP)

All other services will not be available during this time. This includes, for example:
- Email
- Sync & Share
- Central data storage systems (e.g., home directories like H)

Maintenance caused by: Maintenance of central network components along with power supply testing.

The maintenance has been finished.

-----------------

from Jan 5th 22:00 until Jan 6th ~12:00 the Maxwell cluster will NOT be available. This includes all display and login nodes as well as the jupyterhub and helmholtz model zoo.

The previously announced central network maintenance on Jan 6th (see https://it-news.desy.de/?type=infos&lang=en) is expected to disrupt most of the Maxwell services, jobs and sessions, effectively resulting in a Maxwell downtime.

We will hence use and extend the unavoidable downtime to deploy long outstanding updates, avoiding an additional Maxwell downtime later in January.

Maintenance caused by: System Updates

more information about this entry

Starting Friday, 19.12.2025, the central JetBrains licence server at the DESY computing center will be shut down. Instead, JetBrains' online license server will be used for software licensing.

Users who wish to continue using JetBrains, please create a JetBrains account with their personal email address (firstname.lastname@desy.de):
https://account.jetbrains.com/login -> "New here? Create an account"

They must then log in to the JetBrains software with their account:
https://it.desy.de/services/soft/jetbrains/index_eng.html#activate

Licensing via the new licensing method is already possible and recommended before the old license server is shut down.

Maintenance caused by: Change to a new licensing method

more information about this entry

The maintenance work was finished at 15:00h. Affected telephones that have not yet been re-registered can be put back into operation by briefly disconnecting the network cable.

-----------------

On Monday, 15.12.2025, maintenance work will be carried out on the telephone service FreePBX throughout the day. During this time, the IP phones connected to the new telephone system (FreePBX) will register multiple times. This will interrupt active conversation connections.

The following device types are affected:
- All Yealink IP phones
- Cisco CP-7841 phones where the hint "FreePBX" is visible in the top right corner of the phone display
- Some Gigaset DECT phones

If a Gigaset DECT phone does not have a connection to the server, the connection can be restored by restarting the base station (temporarily disconnecting the power).

The website "phonemgr.desy.de" and the softphones "Sangoma phone" will not be available during the maintenance work.

Maintenance caused by: Software Upgrade on the telephone system FreePBX

more information about this entry

On Friday, 12.12.2025, the monthly Windows Updates will be released. Please install them on your DESY Windows devices as soon as possible to ensure that they are up-to-date and secure.

To do this, connect your Windows device to the internal DESY network after the updates have been released. Use VPN if you are extern. When prompted or at the end of the day, restart or shut down your Windows device.

Seven days after the release of the updates, a forced restart of the computers will take place if this has not taken place in the meantime.


Hint:

Next Wednesday, 17.12.2025, from 17:00 to max. 20:00, trouble-free working in the Windows environment cannot be guaranteed due to the monthly maintenance work on the central Windows servers.

It is recommended to log off or shut down DESY Windows devices on Wednesday before the maintenance starts. You should also log off from public Windows systems (terminal servers) beforehand.

Maintenance caused by: Windows updates and the monthly maintenance work on the corresponding central computers

more information about this entry

The maintenance could already be completed by around 4 PM. The GO portal is fully available again.

-----------------

Today, Tuesday, 09.12.2025 between 15:30h and 17:30h, the GO-Portal (https://go.desy.de/portal) is not available.

The GO-Portal is the web service for DESY employees to submit, among other things, vacations and business trips.

Maintenance caused by: Short-term system restart required due to the change of the security certificates

more information about this entry

The maintenance has been finished.

-----------------

From Monday, 24.11.2025 08:30h until Wednesday, 26.11.2025 12:00h, the IP address management system QIP (https://qip.desy.de) will not be available.

As part of the maintenance, the QIP-CLI server peanut.desy.de will also be updated and will therefore also be unavailable.

Please perform any necessary device registrations before or after this period.


Maintenance caused by: Update to latest version QIP24

more information about this entry

On Wednesday, 19.11.2025, starting at 09:00, active Cisco VPN connections will be briefly interrupted.

The Cisco VPN users who are active at the time of the required interruption will be reminded of the upcoming interruption approximately 30 and additionally 10 minutes beforehand via email to their personal email address. Data should be saved before the time of the interruption to avoid potential data loss.

Connections to the internal network via eduVPN or SSH tunnels are not affected by this.

Maintenance caused by: Exchange of the security certificate on the Cisco VPN Gateway

On Dienstag, 18.11.2025, between 16:00h and 19:00h the central storage services DESY Sync & Share and EXFEL Sync & Share won't be available.

If you need data from storage areas of the service during the maintenance, be sure to download or synchronize them before the start of the maintenance.

The sync clients do not have to be switched off during maintenance. The data synchronization will be paused automatically and continue after the maintenance work.

Maintenance caused by: Upgrade to the newest Nextcloud Version

The maintenance has been finished.

-----------------

On Tuesday, 18.11.2025 between 08:30h and 10:30h the central Wiki service XWiki (https://xwiki.desy.de) won't be available due to maintenance works.

Maintenance caused by: Urgent Software Update to Fix Errors

more information about this entry

On Friday, 14.11.2025, the monthly Windows Updates will be released. Please install them on your DESY Windows devices as soon as possible to ensure that they are up-to-date and secure.

To do this, connect your Windows device to the internal DESY network after the updates have been released. Use VPN if you are extern. When prompted or at the end of the day, restart or shut down your Windows device.

Seven days after the release of the updates, a forced restart of the computers will take place if this has not taken place in the meantime.


Hint:

Next Wednesday, 19.11.2025, from 17:00 to max. 20:00, trouble-free working in the Windows environment cannot be guaranteed due to the monthly maintenance work on the central Windows servers.

It is recommended to log off or shut down DESY Windows devices on Wednesday before the maintenance starts. You should also log off from public Windows systems (terminal servers) beforehand.

Maintenance caused by: Windows updates and the monthly maintenance work on the corresponding central computers

more information about this entry

On Friday, November 7, 2025, between 9 a.m. and 1 p.m., a planned power outage will take place in Zeuthen in order to switch back from generator power to the regular local power grid.

During the switchover, there may be brief interruptions to the power supply and associated services.

All services should be available again from 1 p.m. onwards.

Maintenance caused by: Power cut-off

more information about this entry

On Dienstag, 4.11.2025 between 16:00 and 17:00 the request tracking system "Request Tracker" (https://rt-system.desy.de) will be unavailable for a few minutes. A few short interruptions in the accessibility of the system are expected during this time.

New requests created during this time are delivered to the queues after the end of the maintenance at the latest.

Maintenance caused by: Update to fix security vulnerabilities and adjust server resources

From Monday, November 3, 2025, until Tuesday,November 4, 2025, in the morning, there will be a shutdown of the entire network infrastructure in Zeuthen.

This will affect the entire data center and the entire campus in Zeuthen.

Connections to services and computers in Zeuthen will therefore not be possible during this time.

Maintenance caused by: Power cut-off

more information about this entry

Today, Tuesday, 28.10.2025, at about 21:30 a short interruption of a part of the central e-mail service (https://mail.desy.de) for a maximum of 10 minutes will take place.

Only a part of the mailboxes are directly affected by the interruption (1/8). Access with Outlook or Thunderbird to the affected mailboxes will only be possible to a limited extent.

Maintenance caused by: Restarting the services on one of the mail servers to modify the configuration.

From Tuesday, 28.10.2025 09:00h until Thursday, 30.10.2025 12:00h, the IP address management system QIP (https://qip.desy.de) will not be available.

As part of the maintenance, the QIP-CLI server peanut.desy.de will also be updated and will therefore also be unavailable.

Please perform any necessary device registrations before or after this period.


Maintenance caused by: Update to latest version QIP24

more information about this entry

On Tuesday, 21.10.2025 between 10:30h and 11:30h the DOOR System (DESY Online Office for Research with Photons, https://door.desy.de) will not be available.

During this time period the database of the DOOR system will still be accessible for the DESY Gamma Portal (https://gamma-portal.desy.de).

Maintenance caused by: Software Update

more information about this entry

On Tuesday, 21.10.2025 from 07:00 h until 09:00 h, the messaging service Mattermost (https://chat.desy.de) will not be available due to maintenance work.

Maintenance caused by: Upgrade to the latest version and reload.

more information about this entry

The maintenance has been finished.

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Today, October 16, 2025, at 7:30 PM, a brief restart of the XWiki service will take place.

The page https://xwiki.desy.de will then be unavailable for approximately 3 minutes.

Maintenance caused by: Configuration change

more information about this entry

The maintenance has been finished.

-----------------

On Freitag, 17.10.2025, the monthly Windows Updates will be released. Please install them on your DESY Windows devices as soon as possible to ensure that they are up-to-date and secure.

To do this, connect your Windows device to the internal DESY network after the updates have been released. Use VPN if you are extern. When prompted or at the end of the day, restart or shut down your Windows device.

Seven days after the release of the updates, a forced restart of the computers will take place if this has not taken place in the meantime.


Hint:

Next Wednesday, 22.10.2025, from 17:00 to max. 20:00, trouble-free working in the Windows environment cannot be guaranteed due to the monthly maintenance work on the central Windows servers.

It is recommended to log off or shut down DESY Windows devices on Wednesday before the maintenance starts. You should also log off from public Windows systems (terminal servers) beforehand.

Maintenance caused by: Windows updates and the monthly maintenance work on the corresponding central computers

more information about this entry

On Dienstag, 14.10.2025 between 10:00h and 11:00h the BELLE II instance of the conference management system Indico (https://indico.belle2.org) will not be available.

Please save and finish your work in time and keep presentations you need to retrieve from Indico during this time period on an alternative storage medium (e.g. USB stick or local drive)

Maintenance caused by: Installation of Updates

The maintenance has been finished.

-----------------

On Thursday, 09.10.2025, from 08:00 am to 09:00 am, maintenance work will be carried out on the central PostgreSQL database service.

During this time, there will be some brief interruptions of the database service and, consequently, of the associated IT services.

It is recommended to terminate services and connections beforehand to avoid data loss.

Affected services include, but are not limited to:

- XWiki (https://xwiki.desy.de)
- DESY Chat (https://chat.desy.de)
- SYMPA Mailing Listen (https://lists.desy.de)
- EduVPN
- Zentraler Anmelde-Dienst (Keycloak)
- Puppet

A complete list of affected services can be found on the following webpage:
https://ias-intern.desy.de/pls/r/apexkc/pgservices/home
(accessible only from the intranet)

Maintenance caused by: Apply updates

more information about this entry

On Mittwoch, 8.10.2025 between 09:00h and 10:00h the DESY instance of the conference management system Indico (https://indico.desy.de) will not be available.

Please save and finish your work in time and keep presentations you need to retrieve from Indico during this time period on an alternative storage medium (e.g. USB stick or local drive).

Maintenance caused by: Installation of Updates

The maintenance has been finished.

-----------------

On Wednesday, 08.10.2025 between 08:30h and 10:30h the central Wiki service XWiki
(https://xwiki.desy.de) won't be available due to maintenance works.

Reason for Maintenance: Installation of a Security Update

As a preparatory measure for the security update, the server will be restarted once this evening at 7:00 p.m. (October 7, 2025).

Maintenance caused by: Installation of a Security Update

more information about this entry

On 7.10.2025 between 09:00 and 10:00 the HIFIS instance of the conference management system Indico (https://events.hifis.net) will not be available.

Please save and finish your work in time and keep presentations you need to retrieve from Indico during this time period on an alternative storage medium (e.g. USB stick or local drive).

Maintenance caused by: Installation of Updates

On Montag, 6.10.2025 between 10:00h and 11:00h the DOOR System (DESY Online Office for Research with Photons, https://door.desy.de) will not be available.

The API and the database will still be accessible.

Maintenance caused by: Software-Update

The maintenance has been finished.

-----------------

Today, Tuesday, 30.9.2025, from 20:00 to 21:00, maintenance work will be carried out on central network components in building 99 (CFEL).

During this maintenance window, neither WLAN nor wired data network connections will be available for at least 5 minutes in building 99. As a result, telephony and printing will also not be possible in that building during this time.

Maintenance caused by: Software-Update of the Network Switches in the building

more information about this entry

On Montag, 29.9.2025 from 17:00 h to 17:30 h, the form management service https://forms.desy.de will be interrupted for a short time due to maintenance work and is not available.

Please save your content in time!
Already saved forms and their contents will be preserved.

Maintenance caused by: Software update

more information about this entry

The maintenance has been finished.

-----------------

On Montag, 29.9.2025, from 06:00 to 08:00, maintenance work will be carried out on central network components in building 15 (CSSB).

During this maintenance window, neither WLAN nor wired data network connections will be available in building 15. As a result, telephony and printing will also not be possible in that building during this time.

Maintenance caused by: Software-Update of the Network Switches in the building

more information about this entry

Today, Freitag, 26.9.2025, at about 21:00 a short interruption of a part of the central e-mail service (https://mail.desy.de) for up to 15 minutes will take place.

Only a part of the mailboxes are directly affected by the interruption (1/6). Access with Outlook or Thunderbird to the affected mailboxes will only be possible to a limited extent.

Maintenance caused by: Restarting a service on one of the mail servers to fix a technical problem

On Dienstag, 23.9.2025 between 16:00 and 17:00 the request tracking system "Request Tracker" (https://rt-system.desy.de) will be unavailable for a few minutes. A few short interruptions in the accessibility of the system are expected during this time.

New requests created during this time are delivered to the queues after the end of the maintenance at the latest.

Maintenance caused by: Update of the Request-Tracker Version from 5 to 6

more information about this entry

On Friday, 12.9.2025, the monthly Windows Updates will be released. Please install them on your DESY Windows devices as soon as possible to ensure that they are up-to-date and secure.

To do this, connect your Windows device to the internal DESY network after the updates have been released. Use VPN if you are extern. When prompted or at the end of the day, restart or shut down your Windows device.

Seven days after the release of the updates, a forced restart of the computers will take place if this has not taken place in the meantime.


Hint:

Next Wednesday, 17.09.2025, from 17:00 to max. 20:00, trouble-free working in the Windows environment cannot be guaranteed due to the monthly maintenance work on the central Windows servers.

It is recommended to log off or shut down DESY Windows devices on Wednesday before the maintenance starts. You should also log off from public Windows systems (terminal servers) beforehand.

Maintenance caused by: Windows updates and the monthly maintenance work on the corresponding central computers

more information about this entry

On Mittwoch, 10.9.2025 between 06:00h and 08:00h, uninterrupted access to the internet, among other things, cannot be guaranteed.

If the maintenance work proceeds as planned, there might be a slower data transmission, but interruptions in the connection are not expected.

Directly affected by the maintenance works are the following connections:
DESY Hamburg - DESY Zeuthen, internet - DMZ and internet - intranet.

The DMZ is the subnet between the DESY intranet and internet. Within the DESY DMZ the publicly available services are located. For example bastion.desy.de (for the access from outside) and some web servers (e.g. door.desy.de or indico.desy.de).

Maintenance caused by: Maintenance works on a central network component (WAN router - central computer between networks, WAN=wide area network)

more information about this entry

On Tuesday, 9.9.2025 between 13:30h and 14:00h the DOOR System (DESY Online Office for Research with Photons, https://door.desy.de) will not be available.

During this time period the database of the DOOR system will still be accessible for the DESY Gamma Portal (https://gamma-portal.desy.de).

Maintenance caused by: Software Update

more information about this entry

On April 14, 2026, email sending via SMTP/STARTTLS (port 587) will be disabled. All users who currently use email clients or services that send emails via this port must take action and update their configuration in time.

Please ensure that all affected email clients are switched to the currently recommended and secure SSL/TLS protocol by this date.

In the future, the following settings must be used for sending emails:

Server name: mail.desy.de
port 465
encryption: SSL/TLS

Depending on the email client, the naming of these options may vary — some clients may display only “SSL” instead of “SSL/TLS”; in such cases, please select “SSL”.

Authentication is performed using a Zimbra Application Code (see documentation below). As username, you may use either your email address or your DESY username.

Further information and setup instructions can be found at:
https://it.desy.de/dienste/e_mail/mail_clients/index_ger.html
https://it.desy.de/dienste/e_mail/mail_clients/thunderbird/index_ger.html

Background: Due to known vulnerabilities, STARTTLS (also referred to as “Opportunistic TLS”) is no longer considered secure and will therefore be discontinued.

more information about this entry

On Tuesday, 17.03.2026, the login for all SYMPA mailing list servers will be switched to the central single sign on service (Keycloak). After this change, authentication will only be possible using a DESY account or a federated account with a Helmholtz ID.

This measure is being implemented in coordination with D4 to enhance security.
more information about this entry

Due to unforeseen technical complications, the planned migration for all SYMPA mailing list servers will be postponed. We will inform you of a new timeline in due course.

----------------------

On Thursday, 05.03.2026, the login for all SYMPA mailing list servers will be switched to the central single sign on service (Keycloak). After this change, authentication will only be possible using a DESY account or a federated account with a Helmholtz ID.

This measure is being implemented in coordination with D4 to enhance security.
more information about this entry

Starting Wednesday, 04.02.2026, at 12:00 PM, Cisco VPN-based connection attempts originating from devices with outdated operating systems will be blocked.
Additionally, only the Cisco VPN Client will be supported for Cisco VPN connections. Connection attempts via native VPN clients (such as IPSec on macOS) will no longer be possible from that point.

Further details on the implementation of these measures, as well as recommended actions, can be found on the following webpage:
https://it.desy.de/services/networks/vpn/vpn_access_restrictions

Please also note that unblocking your IP address may be needed. In that case use the service https://it-access.desy.de. Additional information on this service can be found here:
https://it.desy.de/services/external_access/it_access

We previously informed about these planned measures in mid-January:
https://it-news.desy.de/?TicketID=1197&lang=en

From Wednesday, 04.02.2026 access to the following services from outside will be restricted:

- Login via Kerberos (a central authentication service)
- Access to AFS (a central Linux file system)

To continue accessing these services from outside, please open the page https://it-access.desy.de beforehand. Only after that, login commands like kinit or aklog (for Kerberos) as well as fs listacl, fs setacl, or fs listquota (for AFS) can be executed.

Further information about IT-Access can be found on the following web page:
https://it.desy.de/services/remote_access/it_access

For security reasons, it is necessary to protect as many services as possible with multi-factor authentication (MFA). Since Kerberos and AFS themselves do not offer the option to secure access via MFA, restricting access in this way is required instead.

Starting Tuesday, 13.01.2026, users establishing Cisco VPN connections with outdated operating systems will receive individual email notifications.

This is a preparatory measure ahead of the planned blocking of such connections from 03.02.2026, to ensure network security in compliance with the requirements of the Computer Security Council (RSR).

For macOS users, the option to use Apples native VPN client (IPSec) will no longer be available in the future. Alternatives are eduVPN or the Cisco VPN client (download via https://vpn.desy.de).

For further information, please refer to the VPN documentation:
https://it.desy.de/dienste/netzwerke/vpn

We will provide separate updates once the blocking of connections is activated.

If you have any questions, please contact the IT Helpdesk at any time (uco@desy.de, phone: 5005).

By the end of the year, the DESY data center and the UCO will be staffed:

- Mon., 22.12. and Tue., 23.12.
- Mon., 29.12. and Tue., 30.12.
- Fri., 02.01.

Each day from 9:00h; Mon.+Tue. until 17:00h / Fri. until 15:00h. The processing of requests may take longer during this period.

In addition, the PC workshop will not be staffed from 29.12. to 02.01. inclusive.

On the following days the DESY computer center as well as the UCO won't be staffed and thus only the IT on-call service will be reachable on the following days:

- Wed., 24.12. until Fri., 26.12.
- Wed., 31.12. and Thu., 01.01.

From Monday, 05.01.2026, we will be available again as usual:
https://it.desy.de/help_uco

The acceptance of goods during opening hours and the continuous supervision of critical services are guaranteed. The telephone numbers of the IT on-call service are known to the experiment and machine control rooms as well as the technical emergency service.
more information about this entry

As of tomorrow, October 7, 2025, access to Confluence, https://confluence.desy.de, will be disabled.

All previous pages on Confluence have been successfully migrated to XWiki, https://xwiki.desy.de.

The service will be disabled in coordination with the CUC.

On Donnerstag, 4.9.2025, between 19:28 and 20:10 the DOOR system (DESY Online Office for Research with Photons, https://door.desy.de) was unavailable for a short period of time.

The cause of the malfunction is still unclear and is currently under internal investigation.