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https://issues.apache.org/jira/browse/GUACAMOLE-1212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17292110#comment-17292110
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Mirek Malinowski commented on GUACAMOLE-1212:
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I've opened a new thread on FreeIPA mailing list and wonder whether it has
something to do with OTP not allowing to use the same token twice.
[https://www.freeipa.org/page/V4/OTP_Replay_Prevention#TOTP_Replay]
https://lists.fedoraproject.org/archives/list/[email protected]/thread/STB67UUQFI3NFFE4HAN2BWVM6DELTDDC/
> Support 2FA Directly in LDAP Extension
> --------------------------------------
>
> Key: GUACAMOLE-1212
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1212
> Project: Guacamole
> Issue Type: Improvement
> Components: guacamole-auth-ldap
> Reporter: Brett Smith
> Priority: Minor
> Attachments: user-with-otp-trace-level.log
>
>
> I'm using FreeIPA in my environment. I have guacamole-auth-ldap enabled and
> configured and it works fine for users who do not have 2FA enabled. For our
> users with 2FA enabled, we are using TOTP tokens provided by FreeIPA.
> When investigating a tcpdump between guacamole and the LDAP server, I can see
> that guacamole passes the username and password to the LDAP server twice.
> This works fine for a traditional username and password, but for a
> 2FA-enabled user, the second authentication attempt returns failure since the
> TOTP is one-time use. 2FA login attempts result in the guacamole logs
> outputting "successfully authenticated" while the web UI shows "Invalid
> Login" in a red banner.
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