Enable Samba server in CentOS 6.3

1. Install Samba
   yum install samba samba-common 
2. Edit Samba config file
   vi /etc/samba/smb.conf
1. In the [global] section
           security = user
           passdb backend = tdbsam
           # Set to follow symbolic links
           follow symlinks = yes
           wide links = yes
           unix extensions = no
2. In the [homes] section
           comment = Home Directories
           browseable = no
           writable = yes
           valid users = %S
           create mask = 0664
           directory mask = 0775
3. Enable Samba in run levels 2, 3, 4, 5
   chkconfig --levels 2345 smb on
4. Start the just installed Samba
   /etc/init.d/smb start
5. Add users with default password as user name
   for i in user1 user2 user3 user4 user5
   do
           echo -e $i\\n$i | smbpasswd -a -s $i
   done
6. Add these lines to /etc/sysconfig/iptables
   -A INPUT -m state --state NEW -m udp -p udp --dport 137 -j ACCEPT
   -A INPUT -m state --state NEW -m udp -p udp --dport 138 -j ACCEPT
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j ACCEPT
7. Restart iptables
   service iptables restart
8. Let SELinux enable Samba home dirs
   setsebool -P samba_enable_home_dirs on

For more details, see http://wiki.centos.org/HowTos/SetUpSamba