Just updated a DC from 4.1.6 to 4.1.7. After the update, it appears to be unable to bind any listening ports with the error NT_STATUS_INVALID_PARAMETER_MIX. This is on CentOS 6.5, running samba 4.1.7 RPMs from sernet. Just as a test, I did a brand new samba-tool provision, and still get the same results when starting, so I don't think it's anything in my configuration, unless there is something required in 4.1.7 that isn't required in 4.1.6 that I'm missing. [global] workgroup = AD realm = EXAMPLE.COM netbios name = AUTH1 server role = active directory domain controller server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbind, ntp_signd, kcc, dnsupdate idmap_ldb:use rfc2307 = yes [netlogon] path = /var/lib/samba/sysvol/example.com/scripts read only = No [sysvol] path = /var/lib/samba/sysvol read only = No Log output at standard loglevel. I tried increasing to debug, but there was nothing else printed beyond all of the internal tasks starting up before the errors, so I didn't include it here. [2014/04/23 12:48:06.907310, 0] ../source4/smbd/server.c:370(binary_smbd_main) samba version 4.1.7-SerNet-RedHat-7.el6 started. Copyright Andrew Tridgell and the Samba Team 1992-2013 [2014/04/23 12:48:07.220605, 0] ../source4/smbd/server.c:492(binary_smbd_main) samba: using 'standard' process model [2014/04/23 12:48:07.230637, 0] ../source4/rpc_server/dcerpc_server.c:1708(add_socket_rpc_tcp_iface) service_setup_stream_socket(address=::,port=0) failed - NT_STATUS_INVALID_PARAMETER_MIX [2014/04/23 12:48:07.230872, 0] ../source4/smbd/service_task.c:35(task_server_terminate) task_server_terminate: [Failed to startup dcerpc server task] [2014/04/23 12:48:07.241117, 0] ../source4/cldap_server/cldap_server.c:134(cldapd_add_socket) Failed to bind to ipv6::::389 - NT_STATUS_INVALID_PARAMETER_MIX [2014/04/23 12:48:07.241403, 0] ../source4/smbd/service_task.c:35(task_server_terminate) task_server_terminate: [cldapd failed to setup interfaces] [2014/04/23 12:48:07.252426, 0] ../source4/smbd/server.c:211(samba_terminate) samba_terminate: Failed to startup dcerpc server task [2014/04/23 12:48:07.258121, 0] ../source4/kdc/kdc.c:672(kdc_add_socket) Failed to bind to :::88 TCP - NT_STATUS_INVALID_PARAMETER_MIX [2014/04/23 12:48:07.258394, 0] ../source4/smbd/service_task.c:35(task_server_terminate) task_server_terminate: [kdc failed to setup interfaces] [2014/04/23 12:48:07.769676, 0] ../source4/ldap_server/ldap_server.c:821(add_socket) ldapsrv failed to bind to :::389 - NT_STATUS_INVALID_PARAMETER_MIX [2014/04/23 12:48:07.769920, 0] ../source4/smbd/service_task.c:35(task_server_terminate) task_server_terminate: [Failed to startup ldap server task]