How to open ports to the outside world in Alibaba Cloud Centos7.X

In a word: if you buy a cloud server from any major manufacturer, just go to the security group and configure the corresponding ports you need to use!

Because the blogger uses Alibaba Cloud, here I will only introduce how to open ports on Alibaba Cloud. Just follow the three pictures below.

At this time, some students said, is it okay not to use the platform? I want to exercise my Linux ability... Of course, I will introduce how to configure firewall rules directly on Linux to open ports (Centos7 and above, the firewall rules used by Centos6 and 7 are different, Centos6 is not introduced here)

First master systemctl+firewall command

describe	Order
Check the firewall status	systemctl status firewalld.service
Start firewall	systemctl start firewalld
Stop the firewall	systemctl stop firewalld
Start firewall at boot	systemctl enable firewalld
Disable firewall at startup	systemctl disable firewalld
Learn more about systemctl command^_^
Check whether the service is started	systemctl is-enabled firewalld.service
View the list of started services	systemctl list-unit-files\|grep enabled
View the list of services that failed to start	systemctl --failed

Secondly, master firewall-cmd command

describe	Order
View all firewall information	firewall-cmd --list-all
View open ports	firewall-cmd --list-ports
Update firewall rules	firewall-cmd --reload
Open Ports	firewall-cmd --zone=public --add-port=3000/tcp --permanent
Closing a Port	firewall-cmd --zone=public --remove-port=3000/tcp --permanent

Final execution steps:

First check whether the firewall is turned on: systemctl status firewalld.service
Open the port (rules need to be updated to take effect after opening): firewall-cmd --zone=public --add-port=3000/tcp --permanent
Update firewall rules: firewall-cmd --reload

This is the end of this article about how to open ports to the outside world in Alibaba Cloud Centos7.X. For more information about how to open ports to the outside world in Alibaba Cloud Centos7.X, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope you will support 123WORDPRESS.COM in the future!

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