[Samba] cli_rpc_pipe_open_schannel_with_creds: rpc_pipe_bind failed with error NT_STATUS_RPC_PROTOCOL_ERROR

[Gaiseric Vandal]

Is this a "classic" domain or AD ?

Can you precreate the samba account ?

e.g.
     #smbpasswd -m -a YOURMACHINENAME


Looks like you are using an LDAP backend.        I recently patched a 
synology NAS server (running samba 4.x.)  The domain is a "classic" 
domain with Samba 3.6.x DC's.      The NAS server lost its domain 
membership.      I could (after some config tweeks) rejoin domain if I 
created the samba account 1st.  (But "net rpc testjoin" is still 
failing. )     Some of your error messages may be similar.







On 05/07/16 05:49, Meg wrote:
> dear samba community,
>
> we have a big problem on joining a Samba 3.5.6 PDC.
> Hopefully anyone has an idea/suggestion.
>
> When trying to join with a Samba 4.2.10 or 4.3.9 we got the following
> error on client site:
>
> Failed to pull dcerpc auth: NT_STATUS_RPC_PROTOCOL_ERROR.
> cli_rpc_pipe_open_schannel_with_key: rpc_pipe_bind failed with error
> NT_STATUS_RPC_PROTOCOL_ERROR
> libnet_join_ok: failed to open schannel session on netlogon pipe to
> server rz-vm12 for domain RZ. Error was NT_STATUS_RPC_PROTOCOL_ERROR
> Failed to join domain: failed to verify domain membership after joining:
> An RPC protocol error occurred.
>
> the following is logged by winbind:
>
> [2016/05/03 15:00:22.939792,  0]
> ../source3/rpc_client/cli_pipe.c:1965(rpc_pipe_bind_step_one_done)
>     Failed to pull dcerpc auth: NT_STATUS_RPC_PROTOCOL_ERROR.
> [2016/05/03 15:00:22.939905,  0]
> ../source3/rpc_client/cli_pipe.c:3209(cli_rpc_pipe_open_schannel_with_key) 
>
>     cli_rpc_pipe_open_schannel_with_key: rpc_pipe_bind failed with error
> NT_STATUS_RPC_PROTOCOL_ERROR
>
> On serversite only the following is logged:
>
> [2016/05/03 15:42:43.198619,  2] auth/auth.c:304(check_ntlm_password)
>     check_ntlm_password:  authentication for user [MACHINENAME$] ->
> [MACHINENAME$] -> [MACHINENAME$] succeeded
> [2016/05/03 15:42:43.216510,  2] 
> passdb/pdb_ldap.c:572(init_sam_from_ldap)
>     init_sam_from_ldap: Entry found for user: rz-vm57$
> [2016/05/03 15:42:43.219008,  2]
> passdb/pdb_ldap.c:2446(init_group_from_ldap)
>     init_group_from_ldap: Entry found for group: 200
> [2016/05/03 15:42:43.219478,  2]
> ../libcli/auth/credentials.c:307(netlogon_creds_server_check_internal)
>     credentials check failed
> [2016/05/03 15:42:43.219523,  0]
> rpc_server/srv_netlog_nt.c:714(_netr_ServerAuthenticate3)
>     _netr_ServerAuthenticate3: netlogon_creds_server_check failed.
> Rejecting auth request from client MACHINENAME machine account 
> MACHINENAME$
>
>
> Settings 4.2.10:
>
> [global]
>       workgroup = RZ
>       server string = Samba Server Version %v
>       security = DOMAIN
>       client schannel = No
>       client NTLMv2 auth = No
>       log file = /var/log/samba/log.%m
>       max log size = 500
>       winbind nss info = rfc2307 template
>       require strong key = No
>       client ipc signing = if_required
>       idmap config * : backend = tdb
>
> Settings 4.3.9:
>
> [global]
>           workgroup = RZ
>           server string = Samba Server Version %v
>           security = DOMAIN
>           log file = /var/log/samba/log.%m_%u_%S
>           max log size = 1024
>           client ipc signing = if_required
>           idmap config * : backend = tdb
>           cups options = raw
>
> Settings 3.5.6:
>
> [global]
>           workgroup = RZ
>           netbios name = RZ
>           server string = SMBRZ Samba Server %v
>           map to guest = Bad User
>           passdb backend = ldapsam:ldap://***
>           log level = 2
>           log file = /opt/samba/log/smb.log
>           max log size = 50000
>           unix extensions = No
>           domain logons = Yes
>           os level = 99
>           domain master = Yes
>           ldap admin dn = ***
>           ldap group suffix = ou=posix
>           ldap machine suffix = ou=machines
>           ldap suffix = ***
>           ldap user suffix = ou=people
>           usershare allow guests = Yes
>           wide links = Yes
>
> thx a lot,
> meg
>