Thank you for this recommendation! Unfortunately freeradius seems to ignore the settings from within /etc/ssl/openssl.cnf for its LDAPS connections. The tool is still negotiating the connection with servers, which provide only TLS 1.1. I added: openssl_conf = default_conf [ default_conf ] ssl_conf = ssl_sect [ ssl_sect ] system_default = system_default_sect [ system_default_sect ] MinProtocol = TLSv1.2 Does freeradius always consider these settings or do I need to configure something in freeradius also? Best regards, Robert Hentsch-Jesse -----Ursprüngliche Nachricht----- Von: Freeradius-Users <freeradius-users-bounces+rhentsch-jesse=phoenixcontact.com@lists.freeradius.org> Im Auftrag von Sven Hartge Gesendet: Montag, 7. Dezember 2020 14:49 An: freeradius-users@lists.freeradius.org Betreff: Re: rlm_ldap: Limit accepted TLS versions on LDAPS ***External email! Do not click links or open attachments unless you recognize the sender and know the content is safe.*** On 07.12.20 14:38, Robert Hentsch-Jesse wrote:
I'm using freeradius with the rlm_ldap module to request users from a OpenLDAP server using the LDAPS protocol. Is there any best practice how to limit the accepted TLS versions to 1.2 and 1.3 on the LDAPS connection? SSL and TLS <= 1.1 should be denied. I found a "tls_min_version" option for the rlm_eap module, but not for rlm_ldap. Are there other possibilities than stripping down the used libssl?
libssl for can also be configured via /etc/ssl/openssl.cnf. You can us it to limit the acceptable chiphers and TLS versions and many other configuration settings. Grüße, Sven. - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html ....................................................................................... PHOENIX CONTACT Cyber Security GmbH Richard-Willstätter-Straße 6, 12489 Berlin, Germany Register Court: AG Charlottenburg, HR B 202908 Geschäftsführer/General Manager: Kilian Golm