C&CZ Problem Card

The RU wifi network (eduroam) will be unavailable on Monday evening April 24 between 23:00 and midnight for half an hour due to maintenance work.

An unattended update of the virtual hosting software (libvirt) triggered a netwerk stack restart. This made the virtual machines unavailable on the network. After a reboot of the virtual hosts (vos and wolf), the virtual machines were available again. Action was not taken immediately, because the alarm mails didn’t reach us, because the mailservers could not be reached. To improve this situation, steps are taken to route the alarms also via alternative channels (sms, whatsapp, signal, etc). Also the network configuration of the virtual machines has been changed, this will hopefully make it less vulnerable to these updates. ...

The printer has to be repaired, but the engineer can’t easily fix it. We hope to have the printer operational again in the near future. A new one with service contract has been ordered, in order to make the poster service more reliable. In the meantime you might use the RU copyshop.

Coma00 serves astro0, astro1, astro3 and astro4 volumes, the server crashed on a kernel-BUG, Monday morning the server was restarted and service resumed normally.

Monday evening March 6, there will be maintenance on RU network equipment. On March 7 between ca. 01:00-01:30 no network traffic will be possible at the Faculty of Science on the wired and wireless networks. From 23:00 until March 7 02:00 there will be a period where no traffic between RU and Internet is possible. Please think which processes depend on network connectivity and prepare for this outage if necessary. ...

The Radius service didn’t start after the regular reboot, restarting the Radius service solved the problem.

Update of Strongswan server software with extra capabilities

Monday morning several employees of FNWI were affected by a fault within the RU Exchange design whereby they could not send their mail to recipients outside of the RU Exchange (i.e. @science.ru.nl, @cs.ru.nl or elsewhere). ISC had added two additional servers to the RU Exchange service the week before, which were not yet allowed to drop their outgoing mail on designated servers for that purpose. Not all FNWI employees using RU Exchange were affected, however, since four out of six servers were still functioning properly and employees using e.g. Thunderbird use servers outside of the RU Exchange for sending their mails. ...

The central network switch in the serverroom at the Faculty of Science will be restarted in connection with an software upgrade. Many servers and services are not available for approx 20 minutes.

In Huygens wing 8 a network switchmodule crashed. Several users lost their connection to the data and telephone network for some time. The switchmodule has been replaced.