How to Setup Two Factor Authentication for SSH on Fedora

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Ravi Saive

I am Ravi Saive, creator of TecMint. A Computer Geek and Linux Guru who loves to share tricks and tips on Internet. Most Of My Servers runs on Open Source Platform called Linux. Follow Me: Twitter, Facebook and Google+

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5 Responses

  1. Ramesh says:

    How secure is Google authenticator app as this needs Internet connection on secure zone linux servers and is it possible without Internet connection too?

    • Ravi Saive says:

      @Ramesh,

      It’s Google app, so there is no issue about security. I haven’t tested it without internet, but I think it should work without internet connection also. Give a try and see..

  2. Sum Yung Gai says:

    Google Authenticator is no longer open source, so I would not run it on my systems anymore. I have done 2FA on CentOS and RHEL systems using US Government PIV/CAC cards, all with open source software that comes with CentOS/RHEL (coolkey driver). It’s not that hard, and I imagine that the new replacement driver, called OpenSC, is available in the latest Fedora (it’s present in RHEL 7.4).

  3. J Billheim says:

    Anyone using Authy vice Google Authenticator to do this?

  4. Loweel says:

    What you set is a single factor authentication, not double. Double factor means

    – Something you know (password)
    – Something you have (your OTP device).

    What you do is to use only the OTP. This is single factor. Keep the password there, and you have two factors.

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