Docker container cannot access the host host

When the firewall is turned on, the host service cannot be accessed inside the docker container (services that can access other LAN computers other than the host). Solution:

1. Configure the firewall rule firewall-cmd --zone=public --add-port={port}/tcp --permanent, and reload the firewall rule firewall-cmd --reload

2. When starting the container Use --net host mode

3, turn off the firewall

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