關(guān)閉默認(rèn)firewalld：
systemctl stop firewalld #關(guān)閉
systemctl restart firewalld #重啟
systemctl start firewalld #開啟
禁止開機(jī)啟動(dòng)firewalld
systemctl disable firewalld #禁止
systemctl enable firewalld #設(shè)置開機(jī)啟動(dòng)
安裝iptables-services
yum install -y iptables-services
啟動(dòng)iptables
systemctl start iptables #開啟
systemctl stop iptables #關(guān)閉
systemctl restart iptables #重啟
配置詳情
cat /etc/sysconfig/iptables
[root@localhost network-scripts]# cat /etc/sysconfig/iptables
# sample configuration for iptables service
# you can edit this manually or use system-config-firewall
# please do not ask us to add additional ports/services to this default configuration
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
[root@localhost network-scripts]# cat /etc/sysconfig/iptables
# sample configuration for iptables service
# you can edit this manually or use system-config-firewall
# please do not ask us to add additional ports/services to this default configuration
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
配置命令
-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT #（允許80端口通過(guò)防火墻）
-A INPUT -m state –state NEW -m tcp -p tcp –dport 3306 -j ACCEPT #（允許3306端口通過(guò)防火墻）
設(shè)置開機(jī)啟動(dòng)iptables
systemctl enable iptables #設(shè)置開機(jī)啟動(dòng)
systemctl disable iptables #禁止
