last night our Linux-Servers made an update of samba from 3.6.23-25 to 3.6.23-30. After that, no smblient is possible to our NetApp:
Domain=[STADT-MH.DE] OS=[Windows Server 2008 R2 Standard 7601 Service Pack 1] Server=[Windows Server 2008 R2 Standard 6.1] ntlmssp3_handle_neg_flags: Got challenge flags[0x60898205] - possible downgrade detected! missing_flags[0x00000010] - NT_STATUS_RPC_SEC_PKG_ERROR session setup failed: NT_STATUS_MORE_PROCESSING_REQUIRED did you forget to run kinit?
Rolling back to samba 3.6.23-25 works! But we want to fix the security-issues with samba 3.6.23-25.
This looks like a failure to support an essential component of the Samba feature set. If the failing feature is part of the RFC for Samba, this isn't about Red Hat client, but about adherence to standards.
In my case just now, the workaround to turn spneg off seems to work. Not exactly a nice way to have to deal with this. What changed in the standards that the NetApp support for Samba isn't keeping up with?