从centos6升级到Centos7,防火墙命令变化了,但是还是习惯以前的iptables命令。本文记录如何开启iptables规则的防火墙。
# firewall-cmd --state
not running
# systemctl stop firewalld.service
# systemctl disable firewalld.service
# yum install -y iptables-services
这个是默认规则
# vim /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
修改规则保存退出
# systemctl restart iptables.service #最后重启防火墙使配置生效
# 设置防火墙开机启动
# systemctl enable iptables.service
# 禁止iptables服务
# systemctl disable iptables
# 暂停服务
# systemctl stop iptables
# 解除禁止iptables
# systemctl enable iptables
# 开启服务
# systemctl start iptables