winbindd: Switching to LDAPS

Support for security such as Firewalls and securing linux
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winbindd: Switching to LDAPS

Post by dreael » 2020/03/17 17:36:17

Hello CentOS users

Currently I am using a Samba installation which is domain member in a regular ActiveDirectory (all domain controllers are Microsoft servers). Configuration has been done with authconfig-tui which generated the needed section insinde the /etc/samba/smb.conf file.


1.) When I check the TLS certificate using a

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openssl s_client -connect
I get a message

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verify error:num=20:unable to get local issuer certificate
which means that I have to add a root certificat first. How to do this?

2.) According to Google / man pages it looks like that a

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idmap config * : ldap_url = ldaps://
line in /etc/samba/smb.conf should do the job. But the issue is: How to ensure that winbindd will use in case when dc01 is temporarily down?

Currently there is no idmap config * : ldap_url line and the man page tells me that ldap://localhost/ is the default value.

Since winbindd correctly connects to the real domain controller and not to itself (localhost), I ask me if

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idmap config * : ldap_url = ldaps://localhost:636/

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idmap config * : ldap_url = ldaps://localhost/
would be the right way for that.

Thanks for any answer for this topic.

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