linux防火墙开启-关闭

1、永久性生效，重启后不会复原

开启： chkconfig iptables on

关闭： chkconfig iptables off

2、 即时生效，重启后复原

开启： service iptables start

关闭： service iptables stop

3、查看防火墙状态

service iptables status 查看iptables状态

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防火墙开放端口：10051、10050、80

open your firewall ports on client and serverside!!

10051 for trapper
10050 for client
80 for httpd

This can be done easy by adding these lines in iptables 

vi /etc/sysconfig/iptables
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 10050 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 10051 -j ACCEPT

restart the firewall

service iptables restart

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RHEL7启动关闭防火墙：

# systemctl status firewalld

# systemctl start/stop firewalld   --重启系统后失效

# systemctl enable/disable firewalld  --重启后也生效