[Samba] Win 10 cannot connect with (some variations of) 'smb encrypt = desired'
Chad William Seys
cwseys at physics.wisc.edu
Fri Dec 23 20:21:16 UTC 2016
There are some surprises when trying to connect Windows 10 (up to date
circa Dec 2016) to Samba (4.5.2) with 'smb encrypt = desired' as a
I've made a grid of some of the combinations 'smb encrypt = desired'
The biggest surprise is that if 'smb encrypt = desired' is set globally
and in the share, Windows 10 cannot connect at all, but if 'smb encrypt
= required' globally then Windows 10 can connect.
"Connecting" was tested by first logging out of Windows, restarting the
smbd daemon, logging in to Windows, opening Explorer, and typing the URL
(UNC?) into the address bar. No credentials were saved in Credential
browse - specify hostname, but not share name - \\smb.physics.wisc.edu
select - browse shares as above, then select the share name in Explorer
direct - specify hostname and sharename - \\smb.physics.wisc.edu\smb
G - global
S - per share
browse | select | direct
smb encrypt (no G, no S) = '' Y | Y | Y
smb encrypt (G, no S) = required Y | Y | Y
smb encrypt (no G, S) = desired Y | N | Y
smb encrypt (G and S) = desired N | N/A | N
smb encrypt (G, no S) = desired N | N/A | N
- Shouldn't the last two combos create the same final connection as a
global 'smb encrypt = required'?
 Successful login needed before shares are visible.
 Error message is "multiple connections to a server or a shared
resource by the same user, using more than one user name, are not
allowed. Disconnect all [...]"
 Error message is "The specified server connot perform the requested
 Error message is "Check the spelling of the name. Otherwise there
might be a problem with your network."
 Browsing shares connection not encrypted. When trying to enter a
share, possibly Samba/Windows tries to create an encrypted connection
leading to . If it is not possible to renegotiate encryption, then
the unencrypted connection should be used instead (remember that 'smb
encryption = desired').
Below is testparm output (for the smb encrypt (no Global, only per
share) = desired case):
realm = PHYSICS.WISC.EDU
server string = %h server
workgroup = PHYSICS
max log size = 100000
syslog = 0
panic action = /usr/share/samba/panic-action %d
kerberos method = secrets and keytab
map to guest = Bad User
security = ADS
server signing = required
hostname lookups = Yes
dns proxy = No
idmap config * : backend = tdb
path = /srv/smb
inherit acls = Yes
inherit permissions = Yes
read only = No
smb encrypt = desired
vfs objects = btrfs streams_xattr
Thanks for your insights!
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