What does CONNECTION_REFUSED mean?

CONNECTION_REFUSED is a network connection error that usually occurs when trying to connect to a remote server. When a client device attempts to establish a network connection with a server, and the server rejects the connection request, a CONNECTION_REFUSED error is returned. Common reasons include: the server is not started, the server cannot accept more connection requests, the server firewall blocks the connection, etc.

CONNECTION_REFUSED is a network connection error that usually occurs when trying to connect to a remote server. When a client device attempts to establish a network connection with a server, and the server rejects the connection request, a CONNECTION_REFUSED error is returned.

CONNECTION_REFUSED error represents an important problem in network communications and can be caused by a variety of reasons. Common reasons include: the server is not started, the server cannot accept more connection requests, the server firewall blocks the connection, etc. In these cases, the server returns a CONNECTION_REFUSED error message to the client to inform the client that the connection cannot be established.

CONNECTION_REFUSED errors are usually accompanied by error codes (for example: ECONNREFUSED). This error code is used to help identify and troubleshoot problems. When the client receives the CONNECTION_REFUSED error message, it can determine the specific cause of the error based on the error code and handle it accordingly.

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Resolving CONNECTION_REFUSED errors may require multiple actions. Here are several common solutions:

1. Make sure the server is up and running: The client cannot connect to a server that is not started, so first make sure the server is running.

2. Confirm whether the server has connection restrictions: Some servers set a maximum connection limit in the configuration. If the limit has been reached, the server will reject new connection requests. In this case, you can try to contact the server administrator to request to increase the number of allowed connections or to release some connections.

3. Check server firewall settings: Server-side firewall settings may block certain connections. In this case, you can try adjusting the firewall rules to allow connections from specific ports or IP addresses.

4. Check the network connection: Sometimes the CONNECTION_REFUSED error is caused by network connection problems. Make sure that the network connection between the client and server is available normally, which can be checked through the ping command or other network testing tools.

In short, the CONNECTION_REFUSED error means that the server rejected the client's connection request. When encountering this error, we can try to solve the problem by checking whether the server is started, checking connection restrictions, checking server firewall settings, and checking network connections.

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