Samba Configuration in Centos

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How to install and configure samba server in CentOS

6.3Posted onFebruary 17, 2013bysharad chhetri4 Comments

How to install and configure samba server in CentOS 6.3

Introduction: Samba is a free software re-implementation of the SMB/CIFS networking protocol,originally developed by Andrew Tridgell. As of version 3, Samba provides file and print services for

various Microsoft Windows clients and can integrate with a Windows Server domain, either as a Primary

Domain Controller (PDC) or as a domain member. It can also be part of an Active Directory domain.

Samba runs on most Unix and Unix-like systems, such as Linux, Solaris, AIX and the BSD variants,

including Apples Mac OS X Server (which was added to the Mac OS X client in version 10.2). Samba is

standard on nearly all distributions of Linux and is commonly included as a basic system service on other

Unix-based operating systems as well. Samba is released under the GNU General Public License. The

name Samba comes from SMB (Server Message Block), the name of the standard protocol used by theMicrosoft Windows network file system.

Reference from :http://en.wikipedia.org/wiki/Samba_%28software%29

Scenario: We will shared directory where permitted user/group can access the shared directory and read

write the files or dir.

Practical Applied on:

Operating System: CentOS release 6.3 (Final)

Packages: On Samba Version 3.5

samba-winbind-clients-3.5.10-125.el6.i686samba-3.5.10-125.el6.i686

samba-common-3.5.10-125.el6.i686

Kernel information: Linux 2.6.32-279.el6.i686 #1 SMP / i686 i686 i386 GNU/Linux

Samba Server uses the following port no. :
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137/tcp

137/udp

138/tcp

138/udp

139/udp

139/udp

445/tcp

445/udp

Daemon name : smb and nmb

Samba services are implemented as two daemons:

smbd, which provides the file and printer sharing services, and

nmbd, which provides the NetBIOS-to-IP-address name service. NetBIOS over TCP/IP requires some

method for mapping NetBIOS computer names to the IP addresses of a TCP/IP network.

How to install and configure samba server:

Step 1: Install through yum command. cups-libs is for printer.

yum install -y samba samba-commons cups-libs

Step 2: create a directory which you would like to share

mkdir /sharedrepo

Step 3: Add a new group or you can use existing group to provide access on shared directory,Here I am

adding new group called staff.

groupadd staff

Step 4: Change the group and permission of sharing folder

chgrp -R staff /sharedrepo

chmod -R 777 /sharedrepo


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Step 5: Change the selinux security context on sharing directory and set the selinux boolean value for

samba .

You can skip this step if selinux has permissive or disabled status. (use sestatus command to check

selinux status)

chcon -R -t samba_share_t /sharedrepo/

semanage fcontext -a -t samba_share_t /sharedrepo/

setsebool -P samba_enable_home_dirs on

Step 6: create user and add them in group called staff. And set the samba password for this user.

useradd test

usermod -G staff test

smbpasswd -a test

Step 7: Take backup of /etc/samba/smb.conf file then edit the smb.conf file. And add the given parameter

in last line of /etc/samba/smb.conf file

cd /etc/samba/

cp -p smb.conf smb.conf.orig

vi /etc/samba/smb.conf

[sharedrepo]comment = shared-directory

path = /sharedrepo

public = no

valid users = test, @staff

writable = yes

browseable = yes

create mask = 0765

Step 8: Edit these lines in /etc/samba/smb.conf . To allow network to reach samba server.

Change the value of 192.168.56.0/24 with your subnet. And change the ethernet value which is in used by

your system and which you want to allow for traffic.

In second line ,192.168.56. is for subnet .Same rule applied to 127. which is for loopback.


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interfaces = lo eth0 eth1 192.168.56.0/24

hosts allow = 127. 192.168.56.

Note: Mainly for windows users,if your all PC in your network are using different WORKGROUP name

edit the given below line in smb.conf with your workgroup name. Windows system bydefault uses theWORKGROUP as WORKGROUP. Try first without changing the WORKGROUP name,if required do

the change.

workgroup = MYGROUP

Step 9 : Add services in /etc/services files

vi /etc/services

netbios-ns 137/tcp # netbios name service

netbios-ns 137/udp # netbios name service

netbios-dgm 138/tcp # netbios datagram service

netbios-dgm 138/udp # netbios datagram service

netbios-ssn 139/udp # netbios session service

netbios-ssn 139/udp # netbios session service

Step 10: Add iptables rule in samba server for port no. 137,138.139 and 445. Edit /etc/sysconfig/iptables

fileNote: If in your network iptables service is stopped or there is no rule set up.Kindly skip this step.

Change the 192.168.56.0/24 value with you network subnet.

[root@localhost ~]# vi /etc/sysconfig/iptables

# Generated by iptables-save v1.4.7 on Sun Feb 17 19:36:23 2013

*filter

:INPUT ACCEPT [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [199:25862]-A INPUT -m statestate RELATED,ESTABLISHED -j ACCEPT

-A INPUT -p icmp -j ACCEPT

-A INPUT -i lo -j ACCEPT

-A INPUT -p tcp -m statestate NEW -m tcpdport 22 -j ACCEPT

-A INPUT -s 192.168.56.0/24 -m state state NEW -p tcp dport 137 -j ACCEPT



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-A INPUT -j REJECTreject-with icmp-host-prohibited

-A INPUT -j REJECTreject-with icmp-port-unreachable

-A FORWARD -j REJECTreject-with icmp-host-prohibitedCOMMIT

# Completed on Sun Feb 17 19:36:23 2013

[root@localhost ~]#

Now restart the iptable

[root@localhost ~]# /etc/init.d/iptables restart

Check the iptable is it implemented or not

[root@localhost ~]#iptables -nL

Step 11: Now start the smb and nmb services.

/etc/init.d/smb start

/etc/init.d/nmb start

Step 12: Now we will test samba from linux and windows machine

Windows User:

Open the Run and type \\ip-address-of-samba-server\shared-Direcory-name

for eg. \\192.168.56.101\sharedrepo.

Give username and password. (password which you set with the help of smbpasswd command)

Linux Users: smbclient must be installed in system .

To check the list of shared objects in samba server.Use the command

smbclient -L \\ipaddress-samba-server -U username (press enter, and give samba password of the

user)

To access through smb console : Use the command


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smbclient //ip-samba-server/sharedDirectory -U username

After getting console you can use get and put command to get the data and put the data in shared dir.

Like the given below eg,

linux@tuxworld:~$ smbclient //192.168.56.101/sharedrepo -U redtest

Enter redtests password:

Domain=[MYGROUP] OS=[Unix] Server=[Samba 3.5.10-125.el6]

smb: \> ls

. D 0 Sun Feb 17 10:50:01 2013

.. DR 0 Sun Feb 17 22:38:55 2013

Untitled Folder D 0 Sun Feb 17 19:45:51 2013

50553 blocks of size 262144. 44708 blocks available

smb: \> help

? allinfo altname archive blocksize

cancel case_sensitive cd chmod chown

close del dir du echo

exit get getfacl geteas hardlink

help history iosize lcd link

lock lowercase ls l mask

md mget mkdir more mput

newer open posix posix_encrypt posix_open

posix_mkdir posix_rmdir posix_unlink print prompt

put pwd q queue quit

readlink rd recurse reget rename

reput rm rmdir showacls setea

setmode stat symlink tar tarmode

translate unlock volume vuid wdel

logon listconnect showconnect .. !

smb: \>

To mount the samba shared directory in machine your system must support cifs file system.

mount -t cifs //samba-server-ipaddress/shared-directory-name -o username=USERNAME /mnt/


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In ubuntu:

From Dash home write the command smb://ipaddr-samba-server/shared-directory

Or take reference fromhttps://help.ubuntu.com/community/Samba/SambaClientGuide
https://help.ubuntu.com/community/Samba/SambaClientGuidehttps://help.ubuntu.com/community/Samba/SambaClientGuidehttps://help.ubuntu.com/community/Samba/SambaClientGuidehttps://help.ubuntu.com/community/Samba/SambaClientGuide

Samba Configuration in Centos

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