{Key or TOTP} and password












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I'm setting up multi-factor authentication on a Linux box. I have successfully been able to tell the box to accept key-and-password or TOTP-and-password, but I'd like it to allow clients to do either. I was loosely following this guide, but ran into the issue that since both password and TOTP are handled by PAM, I can't essentially just tell ssh to use PAM for one type of auth and do another itself. The only way I can think of to do this is if I could create two "chains"(?), for example /etc/pam.d/sshd-password and /etc/pam.d/sshd-totp and have ssh go through one for password and the other for totp. Does such a mechanism exist? If not, is there another way to accomplish this?










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    I'm setting up multi-factor authentication on a Linux box. I have successfully been able to tell the box to accept key-and-password or TOTP-and-password, but I'd like it to allow clients to do either. I was loosely following this guide, but ran into the issue that since both password and TOTP are handled by PAM, I can't essentially just tell ssh to use PAM for one type of auth and do another itself. The only way I can think of to do this is if I could create two "chains"(?), for example /etc/pam.d/sshd-password and /etc/pam.d/sshd-totp and have ssh go through one for password and the other for totp. Does such a mechanism exist? If not, is there another way to accomplish this?










    share|improve this question

























      0












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      0








      I'm setting up multi-factor authentication on a Linux box. I have successfully been able to tell the box to accept key-and-password or TOTP-and-password, but I'd like it to allow clients to do either. I was loosely following this guide, but ran into the issue that since both password and TOTP are handled by PAM, I can't essentially just tell ssh to use PAM for one type of auth and do another itself. The only way I can think of to do this is if I could create two "chains"(?), for example /etc/pam.d/sshd-password and /etc/pam.d/sshd-totp and have ssh go through one for password and the other for totp. Does such a mechanism exist? If not, is there another way to accomplish this?










      share|improve this question














      I'm setting up multi-factor authentication on a Linux box. I have successfully been able to tell the box to accept key-and-password or TOTP-and-password, but I'd like it to allow clients to do either. I was loosely following this guide, but ran into the issue that since both password and TOTP are handled by PAM, I can't essentially just tell ssh to use PAM for one type of auth and do another itself. The only way I can think of to do this is if I could create two "chains"(?), for example /etc/pam.d/sshd-password and /etc/pam.d/sshd-totp and have ssh go through one for password and the other for totp. Does such a mechanism exist? If not, is there another way to accomplish this?







      linux ssh openssh pam google-authenticator






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      asked Jan 15 at 19:36









      Duncan X SimpsonDuncan X Simpson

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