Samba Server Installation and Configuration on CentOS 7

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Samba Server Installation and Configuration on CentOS 7

Version 1.0
Author: Srijan Kishore
Last edited 17/July/2014

This guide explains how to configure samba server in CentOS 7 with anonymous & secured samba servers. Samba is an Open Source/Free Software suite that provides seamless file and print services to SMB/CIFS clients. Samba is freely available, unlike other SMB/CIFS implementations, and allows for interoperability between Linux/Unix servers and Windows-based clients.

1 Preliminary Note

I have a fresh installed CentOS 7.0 server, on which I am going to install the samba server. Off-course you need to have one windows machine to check the  samba server that must be reachable with the CentOS 7.0 server. My Centos 7.0 server have hostname server1.example.com & IP as 192.168.0.100

Note:

  • The Windows machine must be on same workgroup. To check the value in windows machine run the command at cmd prompt

net config workstation

It will be like this

Your windows machine must be at same Workstation domain as in CentOS 7.0 server, i.e. WORKGROUP in my case.

  • To make the windows machine reachable in windows proceed like this. In the run terminal & add  the entry of your server IP address

notepad C:WindowsSystem32driversetchosts

In my case it was like this, just save the values.

[...]
192.168.0.100 	server1.example.com	centos

2 Anonymous samba sharing

First I will explain the methodology to install the samba with the anonymous sharing. To install samba run,

yum install samba samba-client samba-common

It will install samba with Version 4.1.1.

Now to configure samba edit the file /etc/samba/smb.conf before making changes I will make the backup of original file as  /etc/samba/smb.conf.bak

mv /etc/samba/smb.conf /etc/samba/smb.conf.bak

Further give the entries like this

vi /etc/samba/smb.conf

[global] workgroup = WORKGROUP server string = Samba Server %v netbios name = centos security = user map to guest = bad user dns proxy = no #============================ Share Definitions ==============================  [Anonymous] path = /samba/anonymous browsable =yes writable = yes guest ok = yes read only = no

mkdir -p /samba/anonymous
systemctl enable smb.service
systemctl enable nmb.service
systemctl restart smb.service
systemctl restart nmb.service

Further CentOS 7.0 Firewall-cmd will block the samba access, to get rid of that we will run:

firewall-cmd –permanent –zone=public –add-service=samba

[[email protected] ~]# firewall-cmd --permanent --zone=public --add-service=samba success [[email protected] ~]#

firewall-cmd –reload

[[email protected] ~]# firewall-cmd --reload success [[email protected] ~]#

Now you can access the Centos 7.0 sharing in windows as follows, go to the Run prompt and type centos :

centos

From windows machine just browse the folder and try to create a text file, but you will get an error of permission denied.

Check the permission for the shared folder.

ls -l

drwxr-xr-x. 2 root root 6 Jul 17 13:41 anonymous
[[email protected] samba]#

To allow anonymous user give the permissions as follows:

cd /samba

chmod -R 0755 anonymous/
chown -R nobody:nobody anonymous/

ls -l anonymous/

total 0
drwxr-xr-x. 2 nobody nobody 6 Jul 17 13:41 anonymous
[[email protected] samba]#

Further we need to allow the selinux for the samba configuration as follows:

chcon -t samba_share_t anonymous/

Now anonymous user can browse & create the folder contents.

You can cross check the content at server also.

ls -l anonymous/

total 0
-rwxr–r–. 1 nobody nobody 0 Jul 17 16:05 anonymous.txt
[[email protected] samba]#

3. Secured samba server

For this I will create a group smbgrp & user srijan to access the samba server with proper authentication

groupadd smbgrp

useradd srijan -G smbgrp

smbpasswd -a srijan

[[email protected] samba]# smbpasswd -a srijan New SMB password:<--yoursambapassword Retype new SMB password:<--yoursambapassword Added user srijan. [[email protected] samba]#

Now create the folder viz secured in the /samba folder & give permissions like this

mkdir -p /samba/secured

Again we will have to allow to listen through Selinux:

cd /samba
chmod -R 0777 secured/
chcon -t samba_share_t secured/

Again edit the configuration file as :

vi /etc/samba/smb.conf

[...]
[secured]  path = /samba/secured  valid users = @smbgrp  guest ok = no  writable = yes  browsable = yes

systemctl restart smb.service

systemctl restart nmb.service

Further check the settings as follows

testparm

[[email protected] samba]# testparm  Load smb config files from /etc/samba/smb.conf rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384) Processing section "[Anonymous]" Processing section "[secured]" Loaded services file OK. Server role: ROLE_STANDALONE Press enter to see a dump of your service definitions <--ENTER  [global] 	netbios name = CENTOS 	server string = Samba Server %v 	map to guest = Bad User 	dns proxy = No 	idmap config * : backend = tdb  [Anonymous] 	path = /samba/anonymous 	read only = No 	guest ok = Yes  [secured] 	path = /samba/secured 	valid users = @smbgrp 	read only = No [[email protected] samba]#

Now at windows machine check the folder now with the proper credentials

You will again face the issue of permissions to give write permission to the user srijan do:

cd /samba
chown -R srijan:smbgrp secured/

Now samba user  have permissions to write in the folder. Cheers you have done with samba server in CentOS 7.0 🙂

 

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