smbclient //192.168.178.1/share1 fails on SMB1 resource

[Dirk Heumann]

$ smbclient --user=ftpuser //192.168.178.1/share1
protocol negotiation failed: NT_STATUS_CONNECTION_DISCONNECTED

Remvark, with SMB2 resources, the command runs O.K.

Remark: "I also coult not mount the SMB1 drives with "gio mount smb:", what works easily with SMB2 drives.

I will attach the log files of the same command with --debuglevel=10 for Ubuntu 20.04 (beta) and Ubuntu 19.04.

1) Release
$ lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04

2) Package
$ apt-cache policy smbclient
smbclient:
  Installed: 2:4.11.6+dfsg-0ubuntu1
  Candidate: 2:4.11.6+dfsg-0ubuntu1
  Version table:
 *** 2:4.11.6+dfsg-0ubuntu1 500
 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

3) What should happen:
$ smbclient --user=userName1 //192.168.178.1/share1
Enter WORKGROUP\username1's password:
smb: \> l # ← "l" = command within smbclient
...
smb: \> # ← End session with ctrl-d

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: smbclient 2:4.11.6+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Sat Apr 18 14:06:10 2020
InstallationDate: Installed on 2019-02-17 (426 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
SambaClientRegression: Yes
SourcePackage: samba
UpgradeStatus: Upgraded to focal on 2020-04-05 (13 days ago)

[Stefan Metzmacher (metze)]

This is expected, see https://www.samba.org/samba/history/samba-4.11.0.html

You need "client min protocol = NT1" in smb.conf or use
--option="client min protocol = NT1" on the commandline.

[Dirk Heumann (dirk-heumann)]

Thanks a lot

smbclient --user=userName1 --option='client min protocol=nt1' //192.168.178.1/share1

worked ('NT1' = 'nt1' is non case sensitive).

[Andreas Hasenack (ahasenack)]

Closing as invalid as this is the expected behavior with the current version.