after a locked screen, cant login any more. if reboot, all is ok
in osx logs i found "Unable to reach any KDC", in zentyal logs i found:
[2018/03/02 09:41:03.193872, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: AS-REQ attori.cristina@ANTEA.BOGUS from ipv4:192.168.10.67:60872 for krbtgt/ANTEA.BOGUS@ANTEA.BOGUS
[2018/03/02 09:41:03.199558, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Client sent patypes: 149
[2018/03/02 09:41:03.199638, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Looking for PKINIT pa-data -- attori.cristina@ANTEA.BOGUS
[2018/03/02 09:41:03.199651, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Looking for ENC-TS pa-data -- attori.cristina@ANTEA.BOGUS
[2018/03/02 09:41:03.199698, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: No preauth found, returning PREAUTH-REQUIRED -- attori.cristina@ANTEA.BOGUS
[2018/03/02 09:41:03.228510, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: AS-REQ attori.cristina@ANTEA.BOGUS from ipv4:192.168.10.67:49742 for krbtgt/ANTEA.BOGUS@ANTEA.BOGUS
[2018/03/02 09:41:03.232609, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Client sent patypes: encrypted-timestamp, 149
[2018/03/02 09:41:03.232662, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Looking for PKINIT pa-data -- attori.cristina@ANTEA.BOGUS
[2018/03/02 09:41:03.232686, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Looking for ENC-TS pa-data -- attori.cristina@ANTEA.BOGUS
[2018/03/02 09:41:03.232772, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: ENC-TS Pre-authentication succeeded -- attori.cristina@ANTEA.BOGUS using arcfour-hmac-md5
[2018/03/02 09:41:03.242549, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: AS-REQ authtime: 2018-03-02T09:41:03 starttime: unset endtime: 2018-03-02T19:41:03 renew till: unset
[2018/03/02 09:41:03.242701, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Client supported enctypes: aes256-cts-hmac-sha1-96, aes128-cts-hmac-sha1-96, des3-cbc-sha1, arcfour-hmac-md5, using arcfour-hmac-md5/arcfour-hmac-md5
[2018/03/02 09:41:03.242772, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: Requested flags: forwardable
[2018/03/02 09:41:03.254424, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: TGS-REQ attori.cristina@ANTEA.BOGUS from ipv4:192.168.10.67:61401 for bastet$@ANTEA.BOGUS [forwardable]
[2018/03/02 09:41:03.260344, 3] ../source4/auth/kerberos/krb5_init_context.c:80(smb_krb5_debug_wrapper)
Kerberos: TGS-REQ authtime: 2018-03-02T09:41:03 starttime: 2018-03-02T09:41:03 endtime: 2018-03-02T19:41:03 renew till: unset