[Freeipa-users] Do expired passwords remain usable indefinitely?

[David Kupka]

On 25/10/16 01:02, Prasun Gera wrote:
> I've seen some different behaviour. I've had errors for users (including
> the admin user) trying to log in with possibly an expired password. Both
> webui and ssh would fail, but kinit would work. I'm not sure if this is
> related to the password's expiration or the account's expiration. My
> /var/log/secure has messages like "pam_sss(sshd:auth): received for user
> uname: 13 (User account has expired)". Is there a setting for default
> expiration of user accounts ? I don't remember setting it anywhere.
>
> On Mon, Oct 24, 2016 at 8:13 AM, David Kupka <dkupka at redhat.com> wrote:
>
>> On 21/10/16 15:17, Brian Candler wrote:
>>
>>> Question: when a password expires, does it remain in a usable state in
>>> the database indefinitely? For example, if someone comes along a year
>>> after their password has expired, can they still login once with that
>>> password?
>>>
>>> This is actually what I want, but I just want to confirm there's not
>>> some sort of secondary threshold which means that an expired password is
>>> not usable X days after it has expired.  Or, if there is such a
>>> secondary threshold, where I can find it.
>>>
>>> The scenario is a RADIUS server for wifi which reads NTLM password
>>> hashes out of the database to authenticate - this continues to work
>>> after expiry. However I want users to be able to do a self-reset later
>>> if and when they want to.
>>>
>>> Thanks,
>>>
>>> Brian.
>>>
>>>
>> Hello Brian!
>>
>> AFAIK, it will work. Your RADIUS server will retrieve the hash from LDAP
>> and do the validation locally. So FreeIPA has no way to say the password is
>> expired.
>> When the user tries to obtain Kerberos ticket he will be forced to change
>> the password and NTLM hash will be also regenerated.
>>
>> --
>> David Kupka
>>
>>
>> --
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>>
>

Hello Prasun!
If I understood Brian correctly he was asking about expiration of NTLM 
password hashes. In his case there is no checking for password or 
account expiration. It would need to be done in RADIUS server itself 
because RADIUS server just fetches the attributes from LDAP and does 
whatever it is programmed to do.

The situation that you're describing looks weird to me. When user's 
Kerberos Password expires kinit and WebUI forces password change on next 
login attempt. I don't know how ssh client behaves.

When user's Kerberos Principal ("account") expires neither WebUI nor 
kinit would allow login or password change. Administrator must prolong 
or remove the Kerberos Principal expiration.

By default Kerberos Password expiration is set according relevant to 
password policy (global_policy by default) and Kerberos Principal 
expiration is not set.

-- 
David Kupka