La connection Samba échoue à OS X

Le server exécute Ubuntu 12.04 et Samba 3.6.3. Les users de Windows peuvent monter leurs actions sans problèmes, en utilisant le path \\my_server.com\username et count \username .

Cependant, lorsque j'essaie de me connecter au client natif GUI OS X 10.10.5, l'authentification échoue. Le journal ressemble à ceci:

 2015/09/29 15:47:23.536252, 3] smbd/sesssetup.c:1107(reply_sesssetup_and_X_spnego) NativeOS=[Mac OS X 10.10] NativeLanMan=[SMBFS 3.0.2] PrimaryDomain=[] [2015/09/29 15:47:23.536318, 3] ../libcli/auth/ntlmssp_server.c:348(ntlmssp_server_preauth) Got user=[OSX_user] domain=[MY_SERVER] workstation=[workstation] len1=24 len2=260 [2015/09/29 15:47:23.536415, 3] auth/auth.c:219(check_ntlm_password) check_ntlm_password: Checking password for unmapped user [MY_SERVER]\[OSX_user]@[workstation] with the new password interface [2015/09/29 15:47:23.536469, 3] auth/auth.c:222(check_ntlm_password) check_ntlm_password: mapped user is: [MY_SERVER]\[OSX_user]@[workstation] [2015/09/29 15:47:23.536638, 3] passdb/lookup_sid.c:1754(get_primary_group_sid) Forcing Primary Group to 'Domain Users' for OSX_user [2015/09/29 15:47:23.536825, 3] ../libcli/auth/ntlm_check.c:392(ntlm_password_check) ntlm_password_check: NTLMv2 password check failed [2015/09/29 15:47:23.536901, 3] ../libcli/auth/ntlm_check.c:437(ntlm_password_check) ntlm_password_check: Lanman passwords NOT PERMITTED for user OSX_user [2015/09/29 15:47:23.537053, 3] ../libcli/auth/ntlm_check.c:585(ntlm_password_check) ntlm_password_check: LM password, NT MD4 password in LM field and LMv2 failed for user OSX_user [2015/09/29 15:47:23.537268, 2] auth/auth.c:319(check_ntlm_password) check_ntlm_password: Authentication for user [OSX_user] -> [OSX_user] FAILED with error NT_STATUS_WRONG_PASSWORD [2015/09/29 15:47:23.537346, 3] smbd/error.c:81(error_packet_set) error packet at smbd/sesssetup.c(124) cmd=115 (SMBsesssetupX) NT_STATUS_LOGON_FAILURE

Des idées pour lesquelles cela se produit? Dois-je activer NTLM pour les users de OS X?