CentOS7 sets open ports and commonly used command records

CentOS7 still has some differences from the previously commonly used CentOS6. For example, the setting of open ports is slightly different. The commonly used iptables command has been replaced by firewalld. In the past few days, I happened to be playing Seafile self-built network disk in CentOS7 system. By default, port 8082 is not enabled. Then I saw that the open port of CentOS7 is slightly different from that of CentOS6. Here, based on the habit of learning and recording, I will open the port of CentOS7. As well as the organization of commonly used command records.

In this way, when you need CentOS7 open ports and commands in the future, you can directly read and use them. The content is relatively basic and simple for experts, but my memory is not good, so I can only record it.

First, stop and enable the firewall

systemctl stop firewalld.service #Stop systemctl disable firewalld.service #Disable startup at boot systemctl restart iptables.service #Enable systemctl enable iptables.service #Start at boot

Second, commonly used commands

firewall-cmd –state ##Check the firewall status, whether it is runningfirewall-cmd –reload ##Reload the configuration, for example, after adding rules, you need to execute this command firewall-cmd –get-zones ##List supported zonefirewall-cmd –get-services ##List supported services, the services in the list are allowed firewall-cmd –query-service ftp ##Check whether the ftp service is supported, return yes or no firewall-cmd –add-service= ftp ##Temporarily open the ftp service firewall-cmd –add-service=ftp –permanent ##Permanently open the ftp service firewall-cmd –remove-service=ftp –permanent ##Permanently remove the ftp service firewall-cmd –add-port= 80/tcp –permanent ##Permanently add port 80 iptables -L -n ##View rules, this command is the same as iptables man firewall-cmd ##View help

This article has a reference here: http://blog.csdn.net/achang21/article/details/52538049

Third, test the open port

firewall-cmd –zone=public –add-port=8082/tcp –permanent

firewall-cmd –reload

Here I opened port 8082 of seafile the day before yesterday so that I can upload files, otherwise it will not work.

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