iptables配置
添加 iptables 规则
iptables -A INPUT -p tcp -m iprange --src-range 10.191.195.242-10.191.195.245 --dport 2181 -j ACCEPT
iptables -A INPUT -p tcp -m iprange --src-range 10.191.171.45-10.191.171.59 --dport 2181 -j ACCEPT
iptables -A INPUT -p tcp -s 10.191.170.250 --dport 2181 -j ACCEPT
iptables -A INPUT -p tcp --dport 2181 -j DROP删除iptables规则
iptables -D INPUT 1 # 删除INPUT链第一条规则设置开机自启
保存当前的 iptables 规则
iptables-save > /etc/sysconfig/iptables执行以下命令以将 iptables 设置为开机自启
echo "$(which iptables-restore) < /etc/sysconfig/iptables" >> /etc/init.d/boot.local
chmod +x /etc/init.d/boot.local/etc/init.d/boot.local 脚本中添加一行，以在每次系统启动时恢复 iptables 规则。
安装配置iptables
删除firewalld，安装iptables
systemctl stop firewalld.service
systemctl disable firewalld.service
yum -y install iptables-services
systemctl start iptables.service
systemctl enable iptables.service修改iptables
修改配置文件
配置文件的路径为/etc/sysconfig/iptables，直接编辑文件，例如在该文件最上面的规则插入一条允许80端口的规则
# 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 -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p icmp -j ACCEPT
COMMIT配置立即生效
systemctl restart iptables命令行配置
直接在命令行添加了一个允许443端口的规则
iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT保存规则
service iptables save