The Kurier is taking a Christmas break

Dear readers of the Kurier,
This is the last issue of the Kurier in 2024. The next issue will be published in the new year on January 13, 2025. The Kurier editorial team would like to take this opportunity to wish all GSI and FAIR employees a Merry Christmas and a good start to the New Year.
The Kurier editorial team

[Linux] Important changes to lx-pool.gsi.de, restricted connectivity, Remote Desktop via Putty

Starting December 18th 2024 the lx-pool.gsi.de Linux servers and their aliases lxpool.gsi.de etc. will be switched to new servers and thereby upgraded from Debian 10 „Buster“ to Debian 12 „Bookworm“. The new servers are at present available as lxbookworm.gsi.de. The previous servers will continue to be available as lxbuster.gsi.de for a transitional period.

Please check whether the required functionality is still available on lxbookworm.gsi.de and send any feedback to linux-service@gsi.de.

Changed Connectivity:

Direct connections to the new servers are restricted to the GSI networks – external access from the Internet must use the dedicated lxlogin.gsi.de servers. For access via SSH please pass the option -J lxlogin.gsi.de on the command line or add it as ProxyJump lxlogin.gsi.de to your SSH config. In X2Go you can use lxlogin.gsi.de with the option "Use Proxy-Server for SSH connection".

Insofar you only use lx-pool.gsi.de to access other servers from there, we recommend to simply replace lx-pool.gsi.de with lxlogin.gsi.de. External Remote Desktop access to Windows computers (RDP) from external with PuTTY SSH tunnel via lx-pool.gsi.de is also affected by this change. We recommend switching to the Windows VPN or alternatively using lxlogin.gsi.de to set up the tunnel.

Further information is available in our documentation on the GSI website [1] in particular the instructions for remote access [2], SSH and X2go [3], lxlogin.gsi.de [4], the Remote Desktop access with Putty [5], and the Windows VPN [6].

Direct access from the Internet to the servers in the lxbuster.gsi.de pool will also be deactivated starting January 24th 2025.

New SSH host keys:

The SSH host keys of the new servers differ from the previous ones. On first connection you will be prompted to accept these keys. Please check the fingerprints of these keys. They are:

RSA

SHA256:/Bxyg1GFElQ+Ax5guEOzB4Q4iqEI1yRh2FDpfk0iKn0

ECDSA

SHA256:0oRNbutUq/gyvTm3qul0kUSozb773BBDVtoJD+vywqE

ED25519

SHA256:kyVNJenl0p7u/ohB3uD7RFRm3iT2V48nIIu+1FBrtZs

Debian 12 „Bookworm“ on GSI-Linux workstations:

As of now Debian „Bookworm“ is also available as operating system on GSI-Linux workstations (lxg… etc.). Systems with Debian 11 „Bullseye“ typically can be upgraded remotely while they are online (send a message to linux-service@gsi.de to request an upgrade). Systems with Debian 10 „Buster“ have to be reinstalled and therefore be brought to the IT workshop [7].

Kind regards
CIT Linux & Web-Team

[1] https://www.gsi.de/en/work/it/service
[2] https://www.gsi.de/en/work/it/service/remote_access
[3] https://www.gsi.de/en/work/it/service/linux/remote
[4] https://www.gsi.de/en/work/it/service/linux/pools/ssh-jump-hosts
[5] https://www.gsi.de/en/work/it/service/remote_access/ssh_tunnel_win
[6] https://www.gsi.de/en/work/it/service/windows/vpn
[7] https://www.gsi.de/en/work/it/service/it_werkstatt

Das HAPN wurde ins Leben gerufen, um Postdoktoranden aus allen Helmholtz-Zentren zusammenzubringen und zu ermöglichen, die Herausforderungen in der sich entwickelnden wissenschaftlichen Landschaft von heute anzugehen, eine Zusammenarbeit zu fördern und die Karrierewege von Postdocs zu planen. Um mehr über HAPN zu erfahren, besucht bitte unsere Website oder sprecht mit Nico Madysa, eurem HAPN-Vertreter an der GSI.

Weitere Informationen findet ihr in der beigefügten Ankündigung.

The Helmholtz Association Postdoc Network (HAPN) has officially launched!

• 17.12. 16:15 Uhr, GSI-FAIR Colloquium

GSI-FAIR Colloquium, 2024-12-17 16:15:00 Uhr

Main Lecture Hall, GSI

• 18.12. 14:30 Uhr, NUSTAR Seminar

NUSTAR Seminar, 2024-12-18 14:30:00 Uhr

https://gsi-fair.zoom.us/j/68464818747 Meeting-ID: 684 6481 8747 Kenncode: 487257, Seminarroom Theory SB3.3170a

Christine Hornung GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)