What should I do if port 80 cannot be accessed under centos7?

Problem:

After the centos7 listening port starts external services, the port denies access.

Solution:

If you are just using a development environment, you may consider turning off the firewall directly.

(Recommended tutorial: centos tutorial)

Turn off the firewall:

systemctl stop firewalld

Disable it at boot:

systemctl disable firewalld

Run the above After two commands, the firewall is closed and will not start automatically at boot.

Note: Remember not to turn off the firewall at will in the production environment.

Recommended related video tutorials: linux video tutorial

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