Two-Factor Authentication

yasin Guest

Two-Factor Authentication

2023-01-09 05:19

I started using Google Authenticator two-step verification to access my servers. I used to be able to use it with PuTTY with the Remember session password option and now that it's two-step verification it's impossible. But I found a problem, when I try to connect to PuTTY with WinSCP, PuTTY gives an error because it tries to enter my password saved in the Google authentication code. Because now when I try to log in with PuTTY it first asks for the verification code and then my SSH password. In other words, since WinSCP thinks the verification code is the SSH password, PuTTY gives an error without doing anything. Do you think a solution can be developed for this? When I try to log in with PuTTY, I just want to access my server by entering the Google security code.

When I enable two-step verification the login sequence is as follows...

login as: yasin
Verification code:
Password:
Last login: Tue Apr 23 13:58:29 2022 from 172.16.25.125
[root@tecmint ~]#

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,506
Location:: Prague, Czechia

Re: Two-Factor Authentication

2023-01-09

Please attach a full WinSCP session log file showing the authentication (using the latest version of WinSCP).

To generate the session log file, enable logging, log in to your server and do the operation and only the operation that causes the error. Submit the log with your post as an attachment. Note that passwords and passphrases not stored in the log. You may want to remove other data you consider sensitive though, such as host names, IP addresses, account names or file names (unless they are relevant to the problem). If you do not want to post the log publicly, you can mark the attachment as private.

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