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Diffstat (limited to 'docs/configuration/system')
| -rw-r--r-- | docs/configuration/system/login.rst | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/docs/configuration/system/login.rst b/docs/configuration/system/login.rst index 08746201..4e753aad 100644 --- a/docs/configuration/system/login.rst +++ b/docs/configuration/system/login.rst @@ -115,6 +115,62 @@ be able to connect from a single IP address. set system login user vyos authentication public-keys 'User2' key "AAAAQ39x...fbV3" set system login user vyos authentication public-keys 'User2' type ssh-rsa +2FA with OTP +============ + +It is possible to enhance authentication security by using OTP 2FA. +2FA is configured separately for each user. If an OTP key is configured +for a user, 2FA automatically starts for that user. If a user does +not have an OTP key configured, there is no 2FA check for that user. + +To enable OTP 2FA for a user with default settings, +a single command is sufficient: + +.. cfgcmd:: set system login user <username> authentication otp key <key> + + Assign the OTP 2FA key (base32 encoded secret) `<key>` + to the local user `<username>`. + +If necessary, a 2FA verification parameters can be changed globally +(for all users): + +.. cfgcmd:: set system login authentication + otp rate-limit <number_of_attempts> + + Limit logins to `<number_of_attempts>` per every `<number_of_seconds>` + The rate limit must be between 1 and 10 attempts. + +.. cfgcmd:: set system login authentication otp rate-time + <number_of_seconds> + + Limit logins to `<number_of_attempts>` per every `<number_of_seconds>` + The rate time must be between 15 and 600 seconds. + +.. cfgcmd:: set system login authentication otp + window-size <size> + + Set window of concurrently valid codes. + + By default, a new token is generated every 30 seconds by the mobile + application. In order to compensate for possible time-skew between + the client and the server, an extra token before and after the current + time is allowed. This allows for a time skew of up to 30 seconds + between authentication server and client. + + For example, if problems with poor time synchronization are experienced, + the window can be increased from its default size of 3 permitted codes + (one previous code, the current code, the next code) to 17 permitted codes + (the 8 previous codes, the current code, and the 8 next codes). This will + permit for a time skew of up to 4 minutes between client and server. + + The window size must be between 1 and 21. + +Example of enabling 2FA OTP authentication with default parameters: + +.. code-block:: none + + set system login user testuser authentication otp key OHZ3OJ7U2N25BK4G7SOFFJTZDTCFUUE2 + set system login user testuser authentication plaintext-password My_NotSo_secret_password RADIUS ====== |