Does IPFire support user OTP (MFA) login?

Does IPFire support user google OTP (MFA) login (for https UI and ssh to green interface) ? how and where is it configured ?

No, it doesn’t.

Are there any MFA modules for Linux besides Google PAM module?

There is the OATH Toolkit that is used in IPFire for the OpenVPN OTP.

https://oath-toolkit.codeberg.page/
https://oath-toolkit.codeberg.page/man-oathtool.html

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