netstat -anpt
netstat -ntlp
firewall-cmd –state
firewall-cmd –list-ports
firewall-cmd –zone=public –list-ports
firewall-cmd –reload
firewall-cmd –zone=public –add-port=1688/tcp –permanent
firewall-cmd –zone=public –remove-port=1688/tcp –permanent
systemctl start firewalld
systemctl enable firewalld
CentOS7防火墙开放，删除，查看端口
1.防火墙的启动/停止/状态：
#启动防火墙
systemctl start firewalld.service
#关闭防火墙
systemctl stop firewalld.service
#重启防火墙
systemctl restart firewalld.service
#查看防火墙状态
systemctl status firewalld.service
#设置开机启动防火墙
systemctl enable firewalld.service
#设置开机不启动防火墙
systemctl disable firewalld.service
2.新增开放端口号
firewall-cmd –zone=public –add-port=80/tcp –permanent
#说明:
#–zone 作用域
#–add-port=80/tcp #添加端口，格式为：端口/通讯协议
#–permanent 永久生效，没有此参数重启后失效
#开放samba服务端口
firewall-cmd –permanent –zone=public –add-service=samba
#多个端口:
firewall-cmd –zone=public –add-port=80-90/tcp –permanent
#添加完毕过后重新读取防火墙规则或者重启防火墙，规则才生效
firewall-cmd –reload
或者重启防火墙：
systemctl restart firewalld.service
3.查看端口号
#centos7查看防火墙所有信息
firewall-cmd –list-all
#centos7查看防火墙开放的端口信息
firewall-cmd –list-ports
4.删除端口
#删除80端口
firewall-cmd –zone=public –remove-port=80/tcp –permanent