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