The centos system cannot access the remote port

Problem:

centOS7 firewall is turned off but the remote port is inaccessible.

Solution:

Just enable the remote access permission of the port through the firewall.

(Recommended tutorial: centos usage tutorial)

The specific method is as follows:

Add access rights to port 80, which will take effect permanently after being added here

#firewall-cmd --zone=public --add-port=80/tcp --permanent    
#firewall-cmd --reload

Check port 80 access permissions

#firewall-cmd --zone= public --query-port=80/tcp

Close 80 access permissions

#firewall-cmd --zone= public --remove-port=80/tcp --permanent

Related video tutorial recommendations: linux video tutorial

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