Linux iptables

查看所有端口 : netstat -a
查看指定端口 : netstat -a | grep 端口号
查看端口文件 : cat /etc/sysconfig/iptables

e.g.: -A INPUT -p tcp -m state --state NEW -m tcp --dport 8080 -j ACCEPT

iptables : 重启/关闭/状态service iptables status #查看iptables状态

service iptables restart
service iptables stop 
which iptables 
/usr/sbin/iptables 

CentOS7

[[email protected] ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

关闭firewall

[[email protected] ~]# systemctl stop firewalld.service       
[[email protected] ~]# systemctl disable firewalld.service 	#禁止firewall开机启动

安装iptables

[[email protected] ~]# yum install iptables-services 		
[[email protected] ~]# systemctl restart iptables.service
[[email protected] ~]# systemctl enable iptables.service 		#设置防火墙开机启动
[[email protected] ~]# systemctl disable iptables.service 

CentOS6

service 临时
chkconfig 永久

[[email protected] ~]# service iptable status    

[[email protected] ~]#servcie iptables stop        

[[email protected] ~]#service iptables start         

[[email protected] ~]#service iptables restart        

[[email protected] ~]#chkconfig iptables off          

[[email protected] ~]#chkconfig iptables on