Hi I had to upgrade samba because we upgrade DC windows to 2008. My current samba version is 3.5.4-0.70.el5 . I'm using RHE Server release 5.4 After the upgrade this message started to appear: Feb 27 20:52:26 mailgate winbindd[316]: [2011/02/27 20:52:26.682422, 0] libsmb/cliconnect.c:1051(cli_session_setup_spnego) Feb 27 20:52:26 mailgate winbindd[316]: Kinit failed: Cannot contact any KDC for requested realm Feb 27 21:24:37 mailgate winbindd[316]: [2011/02/27 21:24:37.243211, 0] libsmb/smb_signing.c:96(smb_signing_good) Feb 27 21:24:37 mailgate winbindd[316]: smb_signing_good: BAD SIG: seq 1 Feb 27 21:24:37 mailgate winbindd[316]: [2011/02/27 21:24:37.244111, 0] libsmb/clientgen.c:279(cli_receive_smb) Feb 27 21:24:37 mailgate winbindd[316]: SMB Signature verification failed on incoming packet! Feb 27 21:24:37 mailgate winbindd[316]: [2011/02/27 21:24:37.259390, 0] libsmb/cliconnect.c:1051(cli_session_setup_spnego) Feb 27 21:24:37 mailgate winbindd[316]: Kinit failed: Cannot contact any KDC for requested realm Feb 27 21:35:41 mailgate winbindd[316]: [2011/02/27 21:35:41.870499, 0] libsmb/smb_signing.c:96(smb_signing_good) Feb 27 21:35:41 mailgate winbindd[316]: smb_signing_good: BAD SIG: seq 1 Feb 27 21:35:41 mailgate winbindd[316]: [2011/02/27 21:35:41.871435, 0] libsmb/clientgen.c:279(cli_receive_smb) Feb 27 21:35:41 mailgate winbindd[316]: SMB Signature verification failed on incoming packet! Feb 27 21:35:41 mailgate winbindd[316]: [2011/02/27 21:35:41.887275, 0] libsmb/cliconnect.c:1051(cli_session_setup_spnego) Feb 27 21:35:41 mailgate winbindd[316]: Kinit failed: Cannot contact any KDC for requested realm Point is that samba doesn'at authenticate, then i need to restart it. After a couple of days i need to restart it again Do you have any ideas ? Thanks pet