Set up writable public samba share on CentOS 6.7

Turn off SELinux:

setenforce 0

Disable SELinux for next system boot up / restart:

sed -i "s/^SELINUX=.*$/SELINUX=disabled/" /etc/selinux/config

Install samba application:

yum install samba samba-client samba-common -y

Set up samba to start at the next boot up:

chkconfig smb on
chkconfig nmb on

Set up firewall rules:

iptables -I INPUT 4 -m state --state NEW -m udp -p udp --dport 137 -j ACCEPT
iptables -I INPUT 5 -m state --state NEW -m udp -p udp --dport 138 -j ACCEPT
iptables -I INPUT 6 -m state --state NEW -m tcp -p tcp --dport 139 -j ACCEPT
service iptables save

Empty existing samba configuration:

> /etc/samba/smb.conf

Go to edit configuration in your way:

vi /etc/samba/smb.conf

Paste this content:

#======================= Global Settings =========================
[global]
workgroup = WORKGROUP
security = share
map to guest = bad user
#======================= Share Definitions =======================
[public]
path = /public
browsable =yes
writable = yes
guest ok = yes
read only = no

Create missing directory:

mkdir -p /public

Set the right permissions for this share:

chmod -R 0777 /public

Restart samba service:

service smb restart
service nmb restart