credativ® Blog
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Category: HowTos
22 June 2021
Self-hosted Yubico OTP
In the preceding article, Two-Factor Authentication with Yubico OTP, we demonstrated how quickly existing services can be extended with two-factor authentication (2FA) using Yubico OTP with the help of the PAM module pam_yubico. The validation service used, the YubiCloud, is provided by Yubico free of charge. However, the fact that you are bound to an […]
10 December 2020
Create QR Codes for TOTP Secrets
The article Two-factor authentication for OpenSSH and OpenVPN presented a simple way to increase the security of PAM-enabled services through two-factor authentication. The TOTP method used generates a one-time password that is valid for a limited period of time based on a shared secret. Depending on the method and encoding, the shared secret consists of […]
02 November 2020
Two-Factor Authentication for OpenSSH and OpenVPN
Authentication using username and password still represents the standard procedure for most applications to authenticate to a service. However, the use of a second factor is becoming increasingly widespread and is even recommended by the BSI, the German Federal Office for Information Security. While not mandatory, various web services at least offer the option to […]
28 May 2020
What exactly are containers?
For some time now, a large part of the IT landscape has been talking only about “containers”, “microservices” and “Kubernetes.” But what exactly are containers and what technical basis are they based on? General Simply put, a container is an isolated runtime environment for processes. There are various areas that can be separated – the […]
30 April 2020
tmate - Efficient remote maintenance and data sovereignty
Editor’s note, as of 2025-08-27: tmate.io and the tmate project have not been updated since fall 2019, so security vulnerabilities that may have arisen since then may not have been addressed. The tool is no longer recommended. Especially in the current situation surrounding COVID-19, a functioning remote maintenance/remote control solution is extremely important. It has […]
