> So the questions are:
> - is there another cleaner way to exclude the localauth sssd plugin
> (considering that the configuration snippet is recreated at every sssd
> restart)?

Can you test if this hack would help:
    # service sssd stop
    # rm /var/lib/sss/pubconf/krb5.include.d/localauth_plugin
    # touch /var/lib/sss/pubconf/krb5.include.d/localauth_plugin
    # chattr +i /var/lib/sss/pubconf/krb5.include.d/localauth_plugin
    # service sssd start

It works, thanks

btw also check out this ticket:
not needing principal switching from/to root for the moment

> - is there the possibility on IPA 4.1 (the version of our server) to manage > the mapping letting the plugin in place, namely to associate or authorize
> one or multiple service principals with an ipa posix account so that the
> getpwent() works?

I wonder why the mapping fails, can you invalidate the cache with
sss_cache and try to look up the principal from the command line, using
getent passwd primary REALM ?

Maybe I wasn't clear in describing the setup.

I am attempting to log from a local machine as "userA" using the credentials of a "service principal" defined in IPA to a remote machine as "userB" The userB principal is resolvable on the remote host via "getent passwd userB" because it is a user principal. Also the userA principal is resolvable on the local machine, but this should not play a role because the user's credentials are not used for the connection, only the service credentials, as a client. The service principal is not resolvable via "getent passwd" neither on the originating host nor on the destination host. The trick with .k5login is that the service principal used in the connection is granted access as userB because it is listed as one of the principals that correspond to the userB posix account on the remote host.

> - is there a more suitable way to obtain the above delegation and security
> context switching using other mechanisms supported by IPA?
> Thanks in advance
> Stefano

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