# SSSD Manual pages

SSSD The SSSD upstream - http://fedorahosted.org/sssd
pam_sss 8
pam_sss PAM module for SSSD
`pam_sss.so` quiet forward_pass use_first_pass use_authtok retry=N ignore_unknown_user ignore_authinfo_unavail domains=X

### DESCRIPTION

`pam_sss.so` is the PAM interface to the System Security Services daemon (SSSD). Errors and results are logged through `syslog(3)` with the LOG_AUTHPRIV facility.

### OPTIONS

`quiet`

  Suppress log messages for unknown users.

`forward_pass`

  If `forward_pass` is set the entered password is put on the stack for other PAM modules to use.

`use_first_pass`

  The argument use_first_pass forces the module to use a previous stacked modules password and will never prompt the user - if no password is available or the password is not appropriate, the user will be denied access.

`use_authtok`

  When password changing enforce the module to set the new password to the one provided by a previously stacked password module.

`retry=N`

  If specified the user is asked another N times for a password if authentication fails. Default is 0.

  Please note that this option might not work as expected if the application calling PAM handles the user dialog on its own. A typical example is `sshd` with `PasswordAuthentication`.

`ignore_unknown_user`

  If this option is specified and the user does not exist, the PAM module will return PAM_IGNORE. This causes the PAM framework to ignore this module.

`ignore_authinfo_unavail`

  Specifies that the PAM module should return PAM_IGNORE if it cannot contact the SSSD daemon. This causes the PAM framework to ignore this module.

`domains`

  Allows the administrator to restrict the domains a particular PAM service is allowed to authenticate against. The format is a comma-separated list of SSSD domain names, as specified in the sssd.conf file.

  NOTE: Must be used in conjunction with the pam_trusted_users and pam_public_domains options. Please see the sssd.conf 5 manual page for more information on these two PAM responder options.

### MODULE TYPES PROVIDED

All module types (`account`, `auth`, `password` and `session`) are provided.

### FILES

If a password reset by root fails, because the corresponding SSSD provider does not support password resets, an individual message can be displayed. This message can e.g. contain instructions about how to reset a password.

The message is read from the file `pam_sss_pw_reset_message.LOC` where LOC stands for a locale string returned by setlocale 3 . If there is no matching file the content of `pam_sss_pw_reset_message.txt` is displayed. Root must be the owner of the files and only root may have read and write permissions while all other users must have only read permissions.

These files are searched in the directory `/etc/sssd/customize/DOMAIN_NAME/`. If no matching file is present a generic message is displayed.