[Samba] Intermittent failure of net ads join command with error "The transport connection is now disconnected"
Akash Jain
akash.jain110683 at gmail.com
Wed Dec 13 08:10:10 UTC 2017
Hi Louis
Thanks for your reply and the link. I have been following same document and
I do not see any major difference.
The SAMDOM.EXAMPLE.COM is the realm they are using for example but
DOMAIN.COM is also valid realm in my case.
Can you please pin point the configuration line which can cause this
intermittent failure? I believe if the configuration is not correct it will
not succeed even once.
Thanks
Akash
On Tue, Dec 12, 2017 at 4:48 PM, L.P.H. van Belle via samba <
samba at lists.samba.org> wrote:
> Your smb.conf is incorrect/incomplete.
>
> Info here on these 2 links.
> https://wiki.samba.org/index.php/Setting_up_Samba_as_a_Domain_Member
> https://wiki.samba.org/index.php/Idmap_config_rid
>
> Your smb.conf
> > >> [global]
> > >> max log size = 0
> > >> realm = DOMAIN.COM
> > >> workgroup = DOMAIN
> > >> security = ADS
> > >> winbind enum users = yes
> > >> winbind enum groups = yes
> > >> idmap config * : backend = autorid
> > >> idmap config * : range = 1000000-19999999
>
> But Yours should be something like:
> [global]
> security = ADS
> workgroup = SAMDOM
> realm = SAMDOM.EXAMPLE.COM
>
> log file = /var/log/samba/%m.log
> log level = 1
>
> # Default idmap config for local BUILTIN accounts and groups
> idmap config * : backend = tdb
> idmap config * : range = 3000-7999
>
> # idmap config for the SAMDOM domain
> idmap config SAMDOM : backend = rid
> idmap config SAMDOM : range = 10000-999999
>
> # Template settings for login shell and home directory
> winbind nss info = template
> template shell = /bin/bash
> template homedir = /home/%U
>
> Greetz,
>
> Louis
>
>
>
>
> > -----Oorspronkelijk bericht-----
> > Van: samba [mailto:samba-bounces at lists.samba.org] Namens
> > Akash Jain via samba
> > Verzonden: dinsdag 12 december 2017 12:10
> > Aan: samba at lists.samba.org
> > Onderwerp: Re: [Samba] Intermittent failure of net ads join
> > command with error "The transport connection is now disconnected"
> >
> > Hello All
> >
> > Can I get some response on above email.
> >
> > More Setup Details
> >
> > My AD Controller is Windows 2008 R2
> > My Linux machine which is trying to join domain is CentOS
> > Linux release
> > 7.2.1511
> > Samba version is Version 4.6.2
> >
> > Kindly help and let me know if I need to include more
> > information in the
> > email.
> >
> > Thanks
> > Akash
> >
> > On Wed, Dec 6, 2017 at 1:42 PM, Akash Jain
> > <akash.jain110683 at gmail.com>
> > wrote:
> >
> > > Hello All
> > >
> > > Can someone please help me understand what could be the
> > reason SPENGO
> > > fails with windows AD server?
> > >
> > > SPNEGO login failed: The transport connection is now disconnected.
> > > error_string : 'failed to lookup DC info for domain '
> > > DOMAIN.COM <http://domain.com/>' over rpc: The transport
> > connection is
> > > now disconnected.'
> > >
> > >
> > >
> > > Thanks in Advance
> > >
> > > Akash
> > >
> > > On Fri, Dec 1, 2017 at 4:55 PM, Akash Jain
> > <akash.jain110683 at gmail.com>
> > > wrote:
> > >
> > >> Hello All
> > >>
> > >> I am seeing following error intermittently when I try to
> > join the samba
> > >> machine into AD controlled by windows machine.
> > >>
> > >> Failed to join domain: failed to lookup DC info for domain '
> > >> 3DFSTESTAD.COM' over rpc: The transport connection is now
> > disconnected.
> > >>
> > >> If we repeat the same command with same configuration and
> > credentials, it
> > >> succeeds.
> > >>
> > >> Detailed logs at log level 5 are at end of the message.
> > >>
> > >>
> > >> Command:
> > >> net ads join -d5 -e -I <AD Controller IP> -U
> > administrator%<password>
> > >>
> > >> configuration details are as follows
> > >>
> > >> -------------------- smb.conf -----------------------
> > >> [global]
> > >> max log size = 0
> > >> realm = DOMAIN.COM
> > >> workgroup = DOMAIN
> > >> security = ADS
> > >> winbind enum users = yes
> > >> winbind enum groups = yes
> > >> idmap config * : backend = autorid
> > >> idmap config * : range = 1000000-19999999
> > >> passdb backend = tdbsam
> > >>
> > >> ------------------- krb5.conf ------------------------
> > >> [libdefaults]
> > >> default_realm = DOMAIN.COM
> > >> dns_lookup_realm = false
> > >> dns_lookup_kdc = true
> > >> ticket_lifetime = 24h
> > >> renew_lifetime = 7d
> > >> forwardable = true
> > >> rdns = false
> > >> default_ccache_name = KEYRING:persistent:%{uid}
> > >> [realms]
> > >> DOMAIN.COM = {
> > >> kdc = PDC.DOMAIN.COM
> > >> admin_server = PDC.DOMAIN.COM
> > >> }
> > >> [domain_realm]
> > >> domain = DOMAIN.COM
> > >> .domain = DOMAIN.COM
> > >>
> > >>
> > >> ------------------------------------------------------------
> > >> ----------------------------------
> > >>
> > >> Log level 5 logs for net ads command are:
> > >>
> > >>
> > >> Enter Administrator's password:libnet_Join:
> > >> libnet_JoinCtx: struct libnet_JoinCtx
> > >> in: struct libnet_JoinCtx
> > >> dc_name : NULL
> > >> machine_name : 'Hostname'
> > >> domain_name : *
> > >> domain_name : 'DOMAIN.COM'
> > >> domain_name_type : JoinDomNameTypeDNS (1)
> > >> account_ou : NULL
> > >> admin_account : 'Administrator'
> > >> admin_domain : NULL
> > >> machine_password : NULL
> > >> join_flags : 0x00000023 (35)
> > >> 0: WKSSVC_JOIN_FLAGS_IGNORE_UNSUPPORTED_FLAGS
> > >> 0: WKSSVC_JOIN_FLAGS_JOIN_WITH_NEW_NAME
> > >> 0: WKSSVC_JOIN_FLAGS_JOIN_DC_ACCOUNT
> > >> 0: WKSSVC_JOIN_FLAGS_DEFER_SPN
> > >> 0: WKSSVC_JOIN_FLAGS_MACHINE_PWD_PASSED
> > >> 0: WKSSVC_JOIN_FLAGS_JOIN_UNSECURE
> > >> 1: WKSSVC_JOIN_FLAGS_DOMAIN_JOIN_IF_JOINED
> > >> 0: WKSSVC_JOIN_FLAGS_WIN9X_UPGRADE
> > >> 0: WKSSVC_JOIN_FLAGS_ACCOUNT_DELETE
> > >> 1: WKSSVC_JOIN_FLAGS_ACCOUNT_CREATE
> > >> 1: WKSSVC_JOIN_FLAGS_JOIN_TYPE
> > >> os_version : NULL
> > >> os_name : NULL
> > >> os_servicepack : NULL
> > >> create_upn : 0x00 (0)
> > >> upn : NULL
> > >> modify_config : 0x00 (0)
> > >> ads : NULL
> > >> debug : 0x01 (1)
> > >> use_kerberos : 0x00 (0)
> > >> secure_channel_type : SEC_CHAN_WKSTA (2)
> > >> desired_encryption_types : 0x0000001f (31)
> > >> Opening cache file at /var/lib/samba/gencache.tdb
> > >> Opening cache file at /var/lib/samba/lock/gencache_notrans.tdb
> > >> sitename_fetch: Returning sitename for realm 'DOMAIN.COM':
> > >> "Default-First-Site-Name"
> > >> ads_dns_lookup_srv: 1 records returned in the answer section.
> > >> sitename_fetch: Returning sitename for realm 'DOMAIN.COM':
> > >> "Default-First-Site-Name"
> > >> no entry for PDC.DOMAIN.COM#20 found.
> > >> resolve_hosts: Attempting host lookup for name PDC.DOMAIN.COM<0x20>
> > >> namecache_store: storing 1 address for PDC.DOMAIN.COM#20:
> > <AD Controller
> > >> IP>
> > >> Connecting to <AD Controller IP> at port 445
> > >> E2BIG: convert_string(UTF-8,CP850): srclen=26 destlen=16 - '
> > >> PDC.DOMAIN.COM'
> > >> Connecting to <AD Controller IP> at port 139
> > >> Socket options:
> > >> SO_KEEPALIVE = 0
> > >> SO_REUSEADDR = 0
> > >> SO_BROADCAST = 0
> > >> TCP_NODELAY = 1
> > >> TCP_KEEPCNT = 9
> > >> TCP_KEEPIDLE = 7200
> > >> TCP_KEEPINTVL = 75
> > >> IPTOS_LOWDELAY = 0
> > >> IPTOS_THROUGHPUT = 0
> > >> SO_REUSEPORT = 0
> > >> SO_SNDBUF = 87040
> > >> SO_RCVBUF = 367360
> > >> SO_SNDLOWAT = 1
> > >> SO_RCVLOWAT = 1
> > >> SO_SNDTIMEO = 0
> > >> SO_RCVTIMEO = 0
> > >> TCP_QUICKACK = 1
> > >> TCP_DEFER_ACCEPT = 0
> > >> got OID=1.3.6.1.4.1.311.2.2.10
> > >> GENSEC backend 'gssapi_spnego' registered
> > >> GENSEC backend 'gssapi_krb5' registered
> > >> GENSEC backend 'gssapi_krb5_sasl' registered
> > >> GENSEC backend 'spnego' registered
> > >> GENSEC backend 'schannel' registered
> > >> GENSEC backend 'naclrpc_as_system' registered
> > >> GENSEC backend 'sasl-EXTERNAL' registered
> > >> GENSEC backend 'ntlmssp' registered
> > >> GENSEC backend 'ntlmssp_resume_ccache' registered
> > >> GENSEC backend 'http_basic' registered
> > >> GENSEC backend 'http_ntlm' registered
> > >> Starting GENSEC mechanism spnego
> > >> Server claims it's principal name is
> > not_defined_in_RFC4178 at PLEASE_IGNORE
> > >> Starting GENSEC submechanism ntlmssp
> > >> Got challenge flags:
> > >> Got NTLMSSP neg_flags=0x62898215
> > >> NTLMSSP_NEGOTIATE_UNICODE
> > >> NTLMSSP_REQUEST_TARGET
> > >> NTLMSSP_NEGOTIATE_SIGN
> > >> NTLMSSP_NEGOTIATE_NTLM
> > >> NTLMSSP_NEGOTIATE_ALWAYS_SIGN
> > >> NTLMSSP_TARGET_TYPE_DOMAIN
> > >> NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY
> > >> NTLMSSP_NEGOTIATE_TARGET_INFO
> > >> NTLMSSP_NEGOTIATE_VERSION
> > >> NTLMSSP_NEGOTIATE_128
> > >> NTLMSSP_NEGOTIATE_KEY_EXCH
> > >> NTLMSSP: Set final flags:
> > >> Got NTLMSSP neg_flags=0x62088215
> > >> NTLMSSP_NEGOTIATE_UNICODE
> > >> NTLMSSP_REQUEST_TARGET
> > >> NTLMSSP_NEGOTIATE_SIGN
> > >> NTLMSSP_NEGOTIATE_NTLM
> > >> NTLMSSP_NEGOTIATE_ALWAYS_SIGN
> > >> NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY
> > >> NTLMSSP_NEGOTIATE_VERSION
> > >> NTLMSSP_NEGOTIATE_128
> > >> NTLMSSP_NEGOTIATE_KEY_EXCH
> > >> NTLMSSP Sign/Seal - Initialising with flags:
> > >> Got NTLMSSP neg_flags=0x62088215
> > >> NTLMSSP_NEGOTIATE_UNICODE
> > >> NTLMSSP_REQUEST_TARGET
> > >> NTLMSSP_NEGOTIATE_SIGN
> > >> NTLMSSP_NEGOTIATE_NTLM
> > >> NTLMSSP_NEGOTIATE_ALWAYS_SIGN
> > >> NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY
> > >> NTLMSSP_NEGOTIATE_VERSION
> > >> NTLMSSP_NEGOTIATE_128
> > >> NTLMSSP_NEGOTIATE_KEY_EXCH
> > >> SPNEGO login failed: The transport connection is now disconnected.
> > >> libnet_Join:
> > >> libnet_JoinCtx: struct libnet_JoinCtx
> > >> out: struct libnet_JoinCtx
> > >> account_name : NULL
> > >> netbios_domain_name : NULL
> > >> dns_domain_name : NULL
> > >> forest_name : NULL
> > >> dn : NULL
> > >> domain_sid : NULL
> > >> domain_sid : (NULL SID)
> > >> modified_config : 0x00 (0)
> > >> error_string : 'failed to lookup
> > DC info for
> > >> domain 'DOMAIN.COM' over rpc: The transport connection is now
> > >> disconnected.'
> > >> domain_is_ad : 0x00 (0)
> > >> set_encryption_types : 0x00000000 (0)
> > >> result : WERR_NETNAME_DELETED
> > >> return code = -1
> > >> Failed to join domain: failed to lookup DC info for domain
> > 'DOMAIN.COM'
> > >> over rpc: The transport connection is now disconnected.
> > >>
> > >> ------------------------------------------------------------
> > >> ------------------------------------------------------------------
> > >>
> > >> If we compare the Success vs Failure logs, we see only
> > difference of
> > >> following lines:
> > >>
> > >>
> > >> Below lines are missing in Failure case:
> > >> ----------------------------------------------
> > >> Adding cache entry with key=[NBT/PDC.DOMAIN.COM#20] and
> > timeout=[Thu
> > >> Jan 1 05:30:00 1970 IST] (-1511892480 seconds in the past)
> > >> no entry for PDC.DOMAIN.COM#20 found.
> > >> resolve_hosts: Attempting host lookup for name PDC.DOMAIN.COM<0x20>
> > >> namecache_store: storing 1 address for PDC.DOMAIN.COM#20:
> > 172.16.72.124
> > >> Adding cache entry with key=[NBT/PDC.DOMAIN.COM#20] and
> > timeout=[Tue Nov
> > >> 28 23:49:00 2017 IST] (660 seconds ahead)
> > >> internal_resolve_name: returning 1 addresses: <AD Controller IP> :0
> > >> -------------------------------------------------
> > >>
> > >> Also, OIDs are different.
> > >>
> > >> Please help me understand in what scenarios does domain
> > controller will
> > >> revoke the transport connection with SPNEGO failed for
> > same flags and same
> > >> inputs
> > >>
> > >> Thanks
> > >> Akash
> > >>
> > >>
> > >
> > --
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> >
> >
>
>
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