Prevent CentOS 7 from actively outreaching? 50

1. The server of the game you want to play is under maintenance or update, and it cannot be opened to the public for the time being, and it will return to normal after the maintenance is completed.

2. You are using a local area network, that is, multiple computers are connected to the same router, and multiple people share the same bandwidth, so that the IP addresses of multiple computers are the same. If someone logs in to the game on their computer, you won't be able to log in. Because some game companies default to an IP address, only one user can run at the same time.

3. The data traffic of your game port is too small, or your network bandwidth is too small to support the data traffic of the game you want to play.

firewall-cmd --list-all-zones to see all zone information.

firewall-cmd --list-all-zones to see all zone information.

The port corresponds to the service.

None of the services have access to Brother Zi or something?

These are the most basic knowledge.

If you ignore even these basic concepts, you can ignore the booklets.

It would be more rewarding not to waste time on these and to do something else.

Hope you can help you, thank you.

CentOS 7 Firewall is firewalld and firewalld is turned off

systemctl stop

Start Firewalld

systemctl start

Add firewalld to the system service.

systemctl enable

Removed from system services.

systemctl disable

Through the computer, open the control panel, select hardware and sound, then select Manage audio devices, click the recording tab, if no other device is plugged in, the microphone displayed at this time should be the default microphone, click the property button, and then in the device usage column, select not to use this device (disabled), so you can.