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SOLVED Disable Two Factor Authentication with SSH from rescue system

Discussion in 'Security' started by Mario Kos, Jul 12, 2017.

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  1. Mario Kos

    Mario Kos Member

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    Need instructions how to disable 2FA via SSH from linux rescue system.
     
    #1 Mario Kos, Jul 12, 2017
  2. Mario Kos

    Mario Kos Member

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    Got stuck after trying:
    Code:
    mv -v /var/cpanel/authn/twofactor_auth/tfa_userdata.json{,.bak}; echo ‘{}’ >> /var/cpanel/authn/twofactor_auth/tfa_userdata.json
    Now have a problem:
    Internal Server Error
    500
    Security Policy requires exec termination.
     
    #2 Mario Kos, Jul 12, 2017
  3. Infopro

    Infopro cPanel Sr. Product Evangelist
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    #3 Infopro, Jul 12, 2017
  4. Mario Kos

    Mario Kos Member

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    I know about api but can api be called if rescue system is booted?
     
    #4 Mario Kos, Jul 12, 2017
  5. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    Two-factor authentication should not prevent you from accessing the server via SSH as root. Once the server is booted out of rescue mode, you'd simply access the server via SSH as root and run those WHM API 1 commands.

    Thank you.
     
    #5 cPanelMichael, Jul 12, 2017
  6. Mario Kos

    Mario Kos Member

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    Firewall is preventing me from accesing, is it possible to disable 2FA from rescue mode?
     
    #6 Mario Kos, Jul 12, 2017
  7. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    It's unlikely that command will work while the server is booted in rescue mode, but it depends on the OS and the specific boot options you used. You may want to check with your hosting provider to see if they provide an option to disable the firewall rules so you can access the server via SSH.

    Thank you.
     
    #7 cPanelMichael, Jul 12, 2017
  8. Mario Kos

    Mario Kos Member

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    Think local whm or csf is blocking ssh access, can you maybe instruct how to dissable csf from rescue mode?
     
    #8 Mario Kos, Jul 12, 2017
  9. cPanelMichael

    cPanelMichael Forums Analyst
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    You may find this third-party URL helpful:

    How to edit /etc/sysconfig/iptables from: RESCUE MODE boot?

    However, running an incorrect command could lead to data loss so it's generally advised to consult with a qualified system administrator or your hosting provider if you are not comfortable in rescue mode.

    Thank you.
     
    #9 cPanelMichael, Jul 12, 2017
  10. Mario Kos

    Mario Kos Member

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    Solved by disabling CSF adding file csf.disable to csf folder.
    Code:
    touch /etc/csf/csf.disable
    After reboot managed to SSH login and disable 2FA with whmapi1
    Code:
    whmapi1 twofactorauth_disable_policy
     
    #10 Mario Kos, Jul 12, 2017
    cPanelMichael and Infopro like this.
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