What should I do if the swoole service cannot be started?

swooleWhat should I do if the service cannot be started?

Strengthening server security management SWOOLE startup problems encountered

After the server background restricts access to inbound and outbound ports, open the corresponding swoole process, and the server can start swoole. , when starting the client to connect to the corresponding port, the error is reported as follows:

The reason is that after the inbound rule is turned on, the client and server cannot interact yet. Outbound rules must also be configured properly so that the ports can communicate with each other

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