LDAP User Permission Denied with LDAP and SSSD on CentOS 7

centos7ldapopenldapsssd

I am trying to limit LDAP logins to the "admin" group.

This is my /etc/sssd/sssd.conf file:

[domain/default]
autofs_provider = ldap
ldap_tls_reqcert = allow
auth_provider = ldap
ldap_id_use_start_tls = False
chpass_provider = ldap
cache_credentials = True
debug_timestamps = True
ldap_default_authtok_type = password
ldap_search_base = dc=example,dc=com
id_provider = ldap
ldap_default_bind_dn = cn=moderator,ou=moderators,ou=test,o=organization,dc=example,DC=COM
min_id = 100
ldap_uri = ldaps://example.com:636/
ldap_default_authtok = Pa$$word
ldap_tls_cacertdir = /etc/openldap/cacerts/
ldap_tls_cert = /etc/openldap/cacerts/certificate.pem
access_provider = ldap
ldap_access_filter = memberOf=cn=admin,ou=group,o=organization,dc=example,dc=com

[sssd]
services = nss, pam, autofs
domains = default
[nss]
homedir_substring = /home

[pam]

[sudo]

[autofs]

[ssh]

[pac]

[ifp]

[secrets]

[session_recording]

I have tried to do id username and it comes up with:

id user uid=90514(user) gid=20000(users) groups=20000(users),2480(admin)

When trying to change the user by doing su user it gives error su: Permission denied after the passord is entered.
When removing group limitation entries from sssd.conf, it works as expected and lets the user to login.

Any ideas where I have messed up?

Edit: For now I will set it up with /etc/security and PAM and that works. However I am still curious about doing it with sssd.

Best Answer

according to https://www.mankier.com/5/sssd-ldap:

ldap_access_filter (string)

If using access_provider = ldap and ldap_access_order = filter (default), this
option is mandatory. It specifies an LDAP search filter criteria that must be met
for the user to be granted access on this host.

If access_provider = ldap, ldap_access_order = filter and this option is not set,
it will result in all users being denied access. Use access_provider = permit to
change this default behavior.

So apparently, adding access_provider = permit should fix your issue.

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