I have Samba 2.2.7a PDC and BDC, using NIS+, on Solaris 8. After some time clients are no longer allowed to connect (Connection denied from...) and if I try smbpasswd -S (both on BDC and PDC) I get: attempt_netbios_session_request: SYRIUS rejected the session for name *SMBSERVER with error Not listening for calling name fetch_domain_sid: machine SYRIUS rejected the NetBIOS session request. Failed to get domain SID for DOMAIN (SYRIUS is the PDC) The time till this happens varies from a couple of day to maybe some minutes. I shut down the BDC and PDC and the restart the PDC. Sometimes it starts ok, but sometimes it doesn't and I get the same message when I run smbpasswd -S The system run before without any problems with samba 2.2.2a on PDC and 2.2.5 on BDC. This started only after I upgraded the PDC from 2.2.2a to 2.2.7. I upgraded the BDC first and there was no problem. Thanx in advance for any suggestions/solutions Mihai Barbos