Centos 6 iptables settings

# just want to block port
iptables -I INPUT -m set --match-set countryblock 10.0.0.32 -j DROP

#iptables -A INPUT -s 10.0.0.32 -j DROP

iptables -I INPUT -s 10.0.0.32 -j DROP

service iptables save
service iptables reload

iptables -L

#Unblock IP
iptables -D INPUT -s 10.0.0.32 -j DROP

\



Centos7 firewalld settings

iptables -F
iptables -X

firewall-cmd --permanent --add-rich-rule="rule family='ipv4' source address='10.0.0.31' reject"