[Samba] 答复: Is the "\\x.x.x.x" type tree connect request a client related feature?
Chenyehua
chen.yehua at h3c.com
Thu Dec 29 09:42:24 UTC 2016
Thanks for your attention, Gaiseric.
Sorry , but I had a little confused. Did you mean that the problem was something relevant with the DNS? However in my impression, I might not do anything about the DNS.
I have some clues that might be helped:
1) First of all, my samba server version set is "max protocol = SMB2", and the final protocol according to the negotiation result is smb2.10. The problem is more likely to appear when the authentication changes(like user->ldap) or the password changes.
2)The direct fact that leading to the failure may be the bad tree connect request with the format of "\\x.x.x.x", which should be "\\x.x.x.x\xx" required by SMB2 protocol
3)So my key questions are:
a、When and why does the windows 7 sometimes sends the tree connect request (like \\x.x.x.x, which is not accepted by SMB2 protocol) to the samba server?
b、Is this a win7 bug or a problem with the relevant options set? Or anything else?
c、How to solve this problem？
-----邮件原件-----
发件人: samba [mailto:samba-bounces at lists.samba.org] 代表 Gaiseric Vandal via samba
发送时间: 2016年12月27日 23:32
收件人: samba at lists.samba.org
主题: Re: [Samba] Is the "\\x.x.x.x" type tree connect request a client related feature?
Is the samba server a domain controller? Is this a classic domain or an Active Directory domain.
If you are using a classic domain you probably want a WINS server
configured. I find it works better if the primary domain controller
is also the WINS server. In a classic domain, keep the "smb
ports" as the default ( "smb ports = 445 139.") What is the "max
protocol" version set ? I had trouble with SMB2 so I set "max
protocol = NT1."
Do you have forward and reverse DNS entries for all servers ("A" host and "PTR" records.)
I also found that connections to "myservername.mydomain.com\myshare"
would be treated differently on windows 7 clients that connections to
"myservername\myshare" in a classic domain. If the Samba domain name
is "MYDOMAIN" then connections to "myservername.mydomain.com" would result in a conflict of the samba domain name with the DNS domain name.
This caused problems with Microsoft Excel and Powerpoint not trusting documents from an "insecure" source.
On 12/27/16 05:44, Chenyehua via samba wrote:
> Hi folks
>
> I face a problem when using the samba share, Here is the detail:
>
> 1) Phenomenon
>
> In windows 7, sometimes, I type the samba server ip address and
> can see the shared folder. (the samba version is 4.3.11)
>
> a、However when I try to open the shared folder, it fails with a windows error message like “please check the spelling of the name, or some problem may related to the network”, and returns the error code 0x80070035(cannot find the network path).
>
> The shared folder may be opened successfully in a while. Or it will
> always fail in a long period with the error returned above(not sure if
> it will automatically recover finally)
>
> b、The problem in a may be client-related and occasionally appeared. At
> some other windows 7 environments, it may never happen(at least I have
> tried dozens of times, but it turns out normal each time)
>
>
>
> 2) Analysis
>
> a、 Something abnormal can be found in the samba log as below:
>
> [2016/12/26 22:15:35.238956, 0, pid=605906, effective(0, 0), real(0,
> 0)] ../source3/param/loadparm.c:3240(process_usershare_file)
>
> process_usershare_file: share name //172.16.37.96 contains invalid
> characters (any of %<>*?|/\+=;:",)
>
> [2016/12/26 22:15:35.238973, 3, pid=605906, effective(0, 0), real(0,
> 0)] ../source3/param/service.c:249(find_service)
>
> find_service() failed to find service //172.16.37.96
>
> [2016/12/26 22:15:35.238985, 3, pid=605906, effective(0, 0), real(0,
> 0)] ../source3/smbd/smb2_tcon.c:266(smbd_smb2_tree_connect)
>
> smbd_smb2_tree_connect: couldn't find service //172.16.37.96
>
> [2016/12/26 22:15:35.239004, 50, pid=605906, effective(0, 0), real(0,
> 0), class=tevent] ../lib/util/tevent_debug.c:66(samba_tevent_debug)
>
> s3_tevent: Schedule immediate event "tevent_req_trigger":
> 0x56007af6bd80
>
> [2016/12/26 22:15:35.239021, 50, pid=605906, effective(0, 0), real(0,
> 0), class=tevent] ../lib/util/tevent_debug.c:66(samba_tevent_debug)
>
> s3_tevent: Cancel immediate event 0x56007af6bd80 "tevent_req_trigger"
>
> [2016/12/26 22:15:35.239035, 10, pid=605906, effective(0, 0), real(0,
> 0)] ../source3/smbd/smb2_server.c:2789(smbd_smb2_request_error_ex)
>
> smbd_smb2_request_error_ex: idx[1]
> status[NT_STATUS_BAD_NETWORK_NAME] || at
> ../source3/smbd/smb2_tcon.c:135
>
> [2016/12/26 22:15:35.239053, 10, pid=605906, effective(0, 0), real(0,
> 0)] ../source3/smbd/smb2_server.c:2680(smbd_smb2_request_done_ex)
>
> smbd_smb2_request_done_ex: idx[1]
> status[NT_STATUS_BAD_NETWORK_NAME] body[8] dyn[yes:1] at
> ../source3/smbd/smb2_server.c:2837
>
>
>
> b、Something abnormal may also be observed in the wireshark:
>
> the tree connect requests of the normal case may follow like this order:
>
> Tree connect request Tree \\172.16.37.96\IPC$
>
> Tree connect request Tree \\172.16.37.96\sharedfolder1
>
> Tree connect request Tree \\172.16.37.96\sharedfolder2
>
> …
>
> …
>
>
>
> the tree connect requests of the abnormal case may follow like this order:
>
> Tree connect request Tree \\172.16.37.96\IPC$
>
> Tree connect request Tree \\172.16.37.96
>
> Tree connect request Tree \\172.16.37.96
>
> …
>
> …
>
>
>
> 3) Confused
>
> I am confused about the abnormal facts above and have some questions:
>
> When and Why does the windows 7 sometimes send a pure ip address tree connect request (like \\x.x.x.x) to the samba server after the IPC$ request?
>
> Is it fine for the samba 4.3.11 to accept the pure ip address tree connect request?
>
> Is this really a client-related phenomenon?
>
> Are there any solutions about this problem?
>
>
>
>
>
> Thanks
>
> Best regards!
>
>
>
>
>
>
>
>
>
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