The first time you connect to one of the KPH ssh gateways, you will be asked to accept a key fingerprint. Use this page to verify the host keys. Continue reading "ssh server authentication"
ssh server authentication
Comparison of different BBB conference types
The different possible BigBlueButton conference types cause different network and CPU loads. However, this affects not only the BBB server, but also the participants who use very different Internet providers and who have to share the connections with family members and neighbors. Remember that the whole of Germany is in the "home office" during the Corona crisis. Continue reading "Comparison of different BBB conference types"
Create ssh-key pairs
Update: April 11, 2023 - The German Federal Office for Information Security (BSI) requires a key length of at least 3000 bits for the RSA method with the expiration of the year 2023. Therefore, the Institute of Nuclear Physics will no longer accept RSA keys with 2048 bits for new applications. Existing users have been requested to generate new, BSI-compliant keys.
Update: May 15, 2020 - Due to a serious security incident on the university's HPC systems, all SSH keys used so far lose their validity with immediate effect.
This week, the Federal Office for Information Security has again published a warning of the trojan "Emotet"  (only in german)
Fraudsters are currently sending fake applications to prepare dynamite phishing.
In dynamite phishing, the attackers send e-mails to a target with the intention of forcing them to open the e-mail attachment.
Replacement WLAN- and VPN-certificates
On Tuesday, 09.07.2019 at 6pm, the certificates of the WLAN connections "Uni-Mainz" and "eduroam", as well as of the unversity VPN server of the unversity will be renewed. Depending on the operating system, the certificate will be automatically accepted or must be manually accepted due to a request. Either the name oder the fingerprint will be shown.
The correct certificate contains (again depending on the operating system and may be shown partially) the follow information:
CN = radius.zdv.uni-mainz.de
O = Johannes Gutenberg-Universitaet Mainz
L = Mainz
S = Rheinland-Pfalz
C = DE
Fingerprint: e7 78 56 db b8 2c 23 cf f1 26 94 48 42 f4 cd 54 b3 5b 6b 7d
Generating a SSH key with PuTTY
PuTTY is a free implementation of SSH- and Telnet-services for Windows.
Security breach in the WiFi encryption
In a nutshell
- Official title: KRACK (Key Reinstallation AttaCKs)
(here a link for the documentation of KRACK)
- The cause of this security breach is the so called 4-way-handshake method.
(here a Video Explanation) Continue reading "Security breach in the WiFi encryption"
How to access and register at the ssh-gateway.