samba - Oct 2017 - SMB 311 Negotiates and then stops

We are running Samba-4.6.6 and are running into an issue where it negotiates to
a NetApp server but then the client stops the connection.

8262       2017-10-12 09:32:16.198917        10.136.78.14       10.128.101.128 
TCP        66           45848 → 445 [FIN, ACK] Seq=403 Ack=581 Win=16768 Len=0
TSval=11546007 TSecr=3316317046

This is at a customer site, and we cannot recreate it here due to lack of
server. Attached is the wireshark trace. Not sure what the client doesn’t like.

Mike

Re-sending ... We tend to see a lot of issues with NetApp servers and SMB 311.
Not sure what might be wrong with their response packet, that 4.6.6 doesn't
like.

~ Mike


-----Original Message-----
From: samba [mailto:samba-bounces at lists.samba.org] On Behalf Of Tompkins,
Michael via samba
Sent: Monday, October 23, 2017 2:06 PM
To: samba at lists.samba.org
Cc: Karuppiah, Thangavadivel <thangavadivel.k at hcl.com>; USA Xerox Samba
<USA.Xerox.Samba at xerox.com>; Potta, Kishor (HCL) <kishor.potta at
hcl.com>; Futrell, Earl <Earl.Futrell at xerox.com>
Subject: [Samba] SMB 311 Negotiates and then stops

We are running Samba-4.6.6 and are running into an issue where it negotiates to
a NetApp server but then the client stops the connection.

8262       2017-10-12 09:32:16.198917        10.136.78.14       10.128.101.128 
TCP        66           45848 → 445 [FIN, ACK] Seq=403 Ack=581 Win=16768 Len=0
TSval=11546007 TSecr=3316317046

This is at a customer site, and we cannot recreate it here due to lack of
server. Attached is the wireshark trace. Not sure what the client doesn’t like.

Mike

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On Tue, 31 Oct 2017 16:06:13 +0000
"Tompkins, Michael via samba" <samba at lists.samba.org> wrote:
> Re-sending ... We tend to see a lot of issues with NetApp servers and
> SMB 311. Not sure what might be wrong with their response packet,
> that 4.6.6 doesn't like.
> 
> ~ Mike
> 
> 
> -----Original Message-----
> From: samba [mailto:samba-bounces at lists.samba.org] On Behalf Of
> Tompkins, Michael via samba Sent: Monday, October 23, 2017 2:06 PM
> To: samba at lists.samba.org
> Cc: Karuppiah, Thangavadivel <thangavadivel.k at hcl.com>; USA Xerox
> Samba <USA.Xerox.Samba at xerox.com>; Potta, Kishor (HCL)
> <kishor.potta at hcl.com>; Futrell, Earl <Earl.Futrell at
xerox.com>
> Subject: [Samba] SMB 311 Negotiates and then stops
> 
> We are running Samba-4.6.6 and are running into an issue where it
> negotiates to a NetApp server but then the client stops the
> connection.
> 
> 8262       2017-10-12 09:32:16.198917        10.136.78.14
> 10.128.101.128  TCP        66           45848 → 445 [FIN, ACK]
> Seq=403 Ack=581 Win=16768 Len=0 TSval=11546007 TSecr=3316317046
> 
> This is at a customer site, and we cannot recreate it here due to
> lack of server. Attached is the wireshark trace. Not sure what the
> client doesn’t like.
> 
> Mike
> 
Unfortunately, this list strips off attachments, so it might help if
you post the wireshark trace somewhere and then post a link here.

It might also help if you can post the smb.conf files from both
machines.

Rowland