[Pkg-samba-maint] Bug#821730: samba: Cannot connect to Samba 4.2 server from OS X 10.11

[Andrew Bartlett]

On Mon, 2016-04-18 at 21:41 +0000, Tim Rogers wrote:
> Package: samba
> Version: 2:4.2.10+dfsg-0+deb8u2
> Severity: important
> 
> Dear Maintainer,
> 
> After upgrading from Samba 4.1 to Samba 4.2, I can no longer connect
> to shares from OS X 10.11. Linux boxes (upgraded to Samba 4.2)
> connect fine, 
> as does Windows 10. 
> 
> Samba logs show the following error for each connection attempt:
> 
> [2016/04/15 12:40:07.087650,  1]
> ../auth/ntlmssp/ntlmssp_server.c:908(ntlmssp_server_postauth)
>   ntlmssp_server_postauth: invalid NTLMSSP_MIC for user=[GUEST]
> domain=[] workstation=[ROGERS]
> [2016/04/15 12:40:07.087709,  1] ../lib/util/util.c:559(dump_data)
>   [0000] 67 7E 0E CB CE 77 2E 62   05 00 BD F6 E3 84 FB 27   g~...w.b
> .......'
> [2016/04/15 12:40:07.087747,  1] ../lib/util/util.c:559(dump_data)
>   [0000] 43 AD 8C C7 E8 F7 0A 1C   06 A8 03 CB FC C8 17 38   C.......
> .......8
> 
> I assume that there are configuration options for smb.conf which will
> resolve this - but I can't find them. I can't find any clear
> instructions in the 
> documentation, although it seems to suggest that such issues are
> likely with this upgrade.

Do you have 'map to guest = bad user' set in your smb.conf?

Andrew Bartlett

-- 
Andrew Bartlett
https://samba.org/~abartlet/
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT   
https://catalyst.net.nz/services/samba