Time-Server

Currently, two of the three time servers are unavailable, but we are working on resolving the issue.
Provided that all three NTP servers (see: https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/article/c0f898572e8b443f80af7f8e3f9f9b3a/ ) or the RWTH NTP pool has been entered in the respective configuration, local use is not affected.

ntp1.rwth-aachen.de (IPv4) unreachable
ntp1.rwth-aachen.de (IPv6) unreachable
ntp2.rwth-aachen.de (IPv4) ok
ntp2.rwth-aachen.de (IPv6) ok
ntp3.rwth-aachen.de (IPv4) unreachable
ntp3.rwth-aachen.de (IPv6) unreachable

Problem has been fixed

ntp1.rwth-aachen.de (IPv4) ok
ntp1.rwth-aachen.de (IPv6) ok
ntp2.rwth-aachen.de (IPv4) ok
ntp2.rwth-aachen.de (IPv6) ok
ntp3.rwth-aachen.de (IPv4) ok
ntp3.rwth-aachen.de (IPv6) ok

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.

A firmware update for the high-precision synchronization (HPS) module is being carried out on the RWTH time servers. Provided that all time servers mentioned in https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/ are configured as described there, there will be no disruption.

A new software image is being installed.

Provided that all three time servers (https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/article/c0f898572e8b443f80af7f8e3f9f9b3a/) are stored in the respective local configuration, no disruption is expected.

A firmware update for the high-precision synchronization (HPS) module is being carried out on the RWTH time servers. Provided that all time servers mentioned in https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/ are configured as described there, there will be no disruption.

A firmware update for the high-precision synchronization (HPS) module is being carried out on the RWTH time servers. Provided that all time servers mentioned in https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/ are configured as described there, there will be no disruption.

A new software image is being installed.

Provided that all three time servers (https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/article/c0f898572e8b443f80af7f8e3f9f9b3a/) are stored in the respective local configuration, no disruption is expected.

Der Switch c9300-dc-ww10-1, wo zwei der drei Zeitserver angebunden sind muss neugestartet werden, zwecks Update.
Es wird kein Ausfall erwartet, da noch 1 Zeitserver antwortet.
Die Wartung soll voraussichtlich 30 min dauern.

The certificate for the Network Time Security (NTS) protocol offered on the RWTH time servers is being renewed.
In addition, a new software image is also being installed.
Provided that all three time servers (https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/article/c0f898572e8b443f80af7f8e3f9f9b3a/) are stored in the respective local configuration, no disruption is expected.

A firmware update for the high-precision synchronization (HPS) module is being carried out on the RWTH time servers. Provided that all time servers mentioned in https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/ are configured as described there, there will be no disruption.

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers).
https://help.itc.rwth-aachen.de/service/uvjppv3cuan8/

All three time servers were updated to the latest version. In addition, an update of the receiver was initiated at ntp1.rwth-aachen.de, but this was unsuccessful due to incompatibility between the software image and the module update (according to the manufacturer). It is precisely this server that is now experiencing a disruption to the time service. As we offer three time servers, the service is not affected if configured accordingly.

The problem has been solved and the status changed from Stratum 12 to the regular Stratum 1.

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

Bei den Zeitserver der RWTH wird ein Firmware Update für das Modul zur Hochpräzisen Synchronisation (HPS) durchgeführt. Dies betrifft nicht (!) den redundant bereitgestellten NTP-Dienst und es erfolgt somit keine Beeinträchtigung (die Verwendung der drei Zeit-Server vorausgesetzt). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

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.

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

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.

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

The certificates for Network Time Security (NTS) are updated on the RWTH time servers.

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

The RWTH's time servers receive a firmware update. Due to the redundant provision of the NTP service, there is no impairment (assuming the use of the three time servers). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

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.

Die Zeitserver der RWTH erfahren ein Firmware Update. Durch die redundante Bereitstellung des NTP-Dienstes, erfolgt keine Beeinträchtigung (die Verwendung der drei Zeit-Server vorausgesetzt). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

The certificate used for Network Time Security (NTS, 4460/tcp, RFC 8915) on the RWTH time servers (https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/) is updated. Due to the redundancy, there is no interruption here. Also, the Network Time Protocol (NTP, 123/udp) itself and its service on our time servers are not involved.

Die Zeitserver der RWTH erfahren ein Firmware Update. Durch die redundante Bereitstellung des NTP-Dienstes, erfolgt keine Beeinträchtigung (die Verwendung der drei Zeit-Server vorausgesetzt). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

Die Zeitserver der RWTH erfahren ein Firmware Update. Durch die redundante Bereitstellung des NTP-Dienstes, erfolgt keine Beeinträchtigung (die Verwendung der drei Zeit-Server vorausgesetzt). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

Die Zeitserver der RWTH erfahren ein Firmware Update. Durch die redundante Bereitstellung des NTP-Dienstes, erfolgt keine Beeinträchtigung (die Verwendung der drei Zeit-Server vorausgesetzt). https:
help.itc.rwth-aachen.de/service/uvjppv3cuan8/

Derzeit sind die Zeitserver der RWTH nur via IPv4 erreichbar.

Erreichabrkeit via IPv6 wurde wieder hergestellt