Acesso negado ao tentar autenticar com o samba

1

Estou trabalhando com o samba há algum tempo, mas me deparei com um problema. Eu tenho vários compartilhamentos e várias contas, mas as contas não têm acesso aos seus compartilhamentos definidos.

  • Eu tenho um contêiner do Debian 9 no Proxmox;
  • O usuário root pode acessar todos os compartilhamentos (adicionado ao samba com smbpasswd -a);
  • adicionei novos usuários usando useradd e smbpasswd -a;

Eu tenho os seguintes compartilhamentos:

[Backup]
        browseable = yes
        comment = Backup folder
        create mode = 0775
        guest ok = no
        path = /mnt/backup
        read only = no
        valid users = root mark nextcloud
        writable = yes

[Files]
        browseable = yes
        comment = General files
        create mode = 0775
        guest ok = no
        path = /mnt/files
        read only = no
        valid users = root mark nextcloud
        writable = yes

[Movies]
        browseable = yes
        comment = Movies and music folder
        create mode = 0775
        guest ok = no
        path = /mnt/movies
        read only = no
        valid users = root mark nextcloud plex
        writable = yes

[Pictures]
        browseable = yes
        comment = Pictures folder
        create mode = 0775
        guest ok = no
        path = /mnt/pictures
        read only = no
        valid users = root mark nextcloud plex
        writable = yes

[Git]
        browseable = yes
        comment = Git folder
        create mode = 0775
        guest ok = no
        path = /mnt/git
        read only = no
        valid users = root git
        writable = yes

Quando tento me conectar, por exemplo, com o compartilhamento de arquivos, os usuários root e mark podem acessá-lo, mas os usuários nextcloud e plex estão recebendo uma mensagem de acesso negado.

O testparm não me causa nenhum erro:

Load smb config files from /etc/samba/smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section "[Backup]"
Processing section "[Files]"
Processing section "[Movies]"
Processing section "[Pictures]"
Processing section "[Git]"
Loaded services file OK.
Server role: ROLE_STANDALONE

Press enter to see a dump of your service definitions

# Global parameters
[global]
        server role = standalone server
        map to guest = Bad User
        obey pam restrictions = Yes
        pam password change = Yes
        passwd program = /usr/bin/passwd %u
        passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
        unix password sync = Yes
        syslog = 0
        log file = /var/log/samba/log.%m
        max log size = 1000
        dns proxy = No
        usershare allow guests = Yes
        panic action = /usr/share/samba/panic-action %d
        idmap config * : backend = tdb


[Backup]
        comment = Backup folder
        path = /mnt/backup
        valid users = root mark nextcloud
        read only = No
        create mask = 0775


[Files]
        comment = General files
        path = /mnt/files
        valid users = root mark nextcloud
        read only = No
        create mask = 0775


[Movies]
        comment = Movies and music folder
        path = /mnt/movies
        valid users = root mark nextcloud plex
        read only = No
        create mask = 0775


[Pictures]
        comment = Pictures folder
        path = /mnt/pictures
        valid users = root mark nextcloud plex
        read only = No
        create mask = 0775


[Git]
        comment = Git folder
        path = /mnt/git
        valid users = root git
        read only = No
        create mask = 0775

Completo /etc/samba/smb.conf:

#
# Sample configuration file for the Samba suite for Debian GNU/Linux.
#
#
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which 
# are not shown in this example
#
# Some options that are often worth tuning have been included as
# commented-out examples in this file.
#  - When such options are commented with ";", the proposed setting
#    differs from the default Samba behaviour
#  - When commented with "#", the proposed setting is the default
#    behaviour of Samba but the option is considered important
#    enough to be mentioned here
#
# NOTE: Whenever you modify this file you should run the command
# "testparm" to check that you have not made any basic syntactic 
# errors. 

#======================= Global Settings =======================

[global]

## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
   workgroup = WORKGROUP

# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable its WINS Server
#   wins support = no

# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
;   wins server = w.x.y.z

# This will prevent nmbd to search for NetBIOS names through DNS.
   dns proxy = no

#### Networking ####

# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
;   interfaces = 127.0.0.0/8 eth0

# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself.  However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
;   bind interfaces only = yes



#### Debugging/Accounting ####

# This tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/log.%m

# Cap the size of the individual log files (in KiB).
   max log size = 1000

# If you want Samba to only log through syslog then set the following
# parameter to 'yes'.
#   syslog only = no

# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
   syslog = 0

# Do something sensible when Samba crashes: mail the admin a backtrace
   panic action = /usr/share/samba/panic-action %d


####### Authentication #######

# Server role. Defines in which mode Samba will operate. Possible
# values are "standalone server", "member server", "classic primary
# domain controller", "classic backup domain controller", "active
# directory domain controller". 
#
# Most people will want "standalone sever" or "member server".
# Running as "active directory domain controller" will require first
# running "samba-tool domain provision" to wipe databases and create a
# new domain.
   server role = standalone server

# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.  
   passdb backend = tdbsam

   obey pam restrictions = yes

# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
   unix password sync = yes

# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<[email protected]> for
# sending the correct chat script for the passwd program in Debian Sarge).
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .

# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
   pam password change = yes

# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
   map to guest = bad user

########## Domains ###########

#
# The following settings only takes effect if 'server role = primary
# classic domain controller', 'server role = backup domain controller'
# or 'domain logons' is set 
#

# It specifies the location of the user's
# profile directory from the client point of view) The following
# required a [profiles] share to be setup on the samba server (see
# below)
;   logon path = \%N\profiles\%U
# Another common choice is storing the profile in the user's home directory
# (this is Samba's default)
#   logon path = \%N\%U\profile

# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
;   logon drive = H:
#   logon home = \%N\%U

# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
;   logon script = logon.cmd

# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe.  The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u

# This allows machine accounts to be created on the domain controller via the 
# SAMR RPC pipe.  
# The following assumes a "machines" group exists on the system
; add machine script  = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u

# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe.  
; add group script = /usr/sbin/addgroup --force-badname %g

############ Misc ############

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /home/samba/etc/smb.conf.%m

# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
;   idmap uid = 10000-20000
;   idmap gid = 10000-20000
;   template shell = /bin/bash

# Setup usershare options to enable non-root users to share folders
# with the net usershare command.

# Maximum number of usershare. 0 (default) means that usershare is disabled.
;   usershare max shares = 100

# Allow users who've been granted usershare privileges to create
# public shares, not just authenticated ones
   usershare allow guests = yes

#======================= Share Definitions =======================

#[homes]
#   comment = Home Directories
#   browseable = no

# By default, the home directories are exported read-only. Change the
# next parameter to 'no' if you want to be able to write to them.
#   read only = yes

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
#   create mask = 0700

# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
#   directory mask = 0700

# By default, \server\username shares can be connected to by anyone
# with access to the samba server.
# The following parameter makes sure that only "username" can connect
# to \server\username
# This might need tweaking when using external authentication schemes
#   valid users = %S

# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)
#;[netlogon]
#;   comment = Network Logon Service
#;   path = /home/samba/netlogon
#;   guest ok = yes
#;   read only = yes

# Un-comment the following and create the profiles directory to store
# users profiles (see the "logon path" option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
#;[profiles]
#;   comment = Users profiles
#;   path = /home/samba/profiles
#;   guest ok = no
#;   browseable = no
#;   create mask = 0600
#;   directory mask = 0700

#[printers]
#   comment = All Printers
#   browseable = no
#   path = /var/spool/samba
#   printable = yes
#   guest ok = no
#   read only = yes
#   create mask = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
#[print$]
#   comment = Printer Drivers
#   path = /var/lib/samba/printers
#   browseable = yes
#   read only = yes
#   guest ok = no
# Uncomment to allow remote administration of Windows print drivers.
# You may need to replace 'lpadmin' with the name of the group your
# admin users are members of.
# Please note that you also need to set appropriate Unix permissions
# to the drivers directory for these users to have write rights in it
#;   write list = root, @lpadmin

[Backup]
    browseable = yes
    comment = Backup folder
    create mode = 0775
    guest ok = no
    path = /mnt/backup
    read only = no
    valid users = root mark nextcloud
    writable = yes
# TODO: Make specific shares for devices that need to be backuped (Laptop, Phone and Tablet)

[Files]
    browseable = yes
    comment = General files
        create mode = 0775
    guest ok = no
    path = /mnt/files
    read only = no
    valid users = root mark nextcloud
    writable = yes

[Movies]
    browseable = yes
    comment = Movies and music folder
        create mode = 0775
    guest ok = no
    path = /mnt/movies
    read only = no
    valid users = root mark nextcloud plex
    writable = yes

[Pictures]
    browseable = yes
    comment = Pictures folder
        create mode = 0775
    guest ok = no
    path = /mnt/pictures
    read only = no
    valid users = root mark nextcloud plex
    writable = yes

[Git]
    browseable = yes
        comment = Git folder
        create mode = 0775
        guest ok = no
        path = /mnt/git
        read only = no
        valid users = root git
        writable = yes

menos / etc / passwd

root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
postfix:x:100:104::/var/spool/postfix:/bin/false
sshd:x:101:65534::/var/run/sshd:/usr/sbin/nologin
messagebus:x:102:108::/var/run/dbus:/bin/false
plex:x:1000:1000::/home/plex:/bin/sh
nextcloud:x:1001:1001::/home/nextcloud:/bin/sh
git:x:1002:1002::/home/git:/bin/sh
mark:x:1003:1003::/home/mark:/bin/sh

ls -l / mnt / files /

total 16
drwxr-xr-x  2 nobody nogroup 4096 Jul 13 17:43 Games
drwxr-xr-x  2 nobody nogroup 4096 Jul 13 04:57 Movies
drwxr-xr-x  9 nobody nogroup 4096 Jul 12 06:28 MusicOrganized
drwxr-xr-x 13 nobody nogroup 4096 Jul 13 15:32 _Done
    
por MPH 17.07.2017 / 14:23

2 respostas

0

Antes de tudo obrigado pela ajuda.

O sistema que estou usando não tem journalctl, então não posso postar isso. Eu também fui a todos os arquivos de log do samba em / var / log / samba / mas não consegui encontrar nada sobre as tentativas de login.

Eu tentei conectar-me a ele usando AndSMB para Android, tentei conectar usando o Ubuntu Mate e tentei me conectar ao compartilhamento usando o Windows 10. Todos eles deram um erro de acesso negado sem mais informações.

No entanto, encontrei uma solução para esse problema:

  • criei um grupo para cada compartilhamento;
  • adicionei os usuários que podem acessar esses grupos;
  • Eu fiz do grupo o proprietário do compartilhamento;
  • E finalmente mudei as permissões para 775 com chmod.
por 17.07.2017 / 15:31
0

Você não mencionou nada sobre o cliente que está usando ao tentar montar os compartilhamentos.

Uma possibilidade é que o cliente do qual você está montando use um método de autenticação que se tornou obsoleto devido a problemas de segurança. Você pode tentar

mount -o sec=ntlmssp //example.com/share /path/to/mount/dir

para corrigir este problema.

    
por 17.07.2017 / 15:23

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