What is the reason for ERR_CONNECTION_REFUSED

ERR_CONNECTION_REFUSED Reasons: 1. The server does not start or is not running normally; 2. Server firewall settings; 3. Network problems; 4. DNS problems.

ERR_CONNECTION_REFUSED is an error message that usually appears on browsers. It means that the browser cannot establish a connection to the target server. This error message can be caused by a number of reasons.

1. The server is not started or not running properly: ERR_CONNECTION_REFUSED occurs when the browser tries to connect to a server and the server is not started or not running properly. In this case, the browser cannot establish a connection to the server and therefore cannot load the web page.

2. Server firewall settings: The firewall on the server may block access to specific ports or IP addresses. The ERR_CONNECTION_REFUSED error results if the port or IP address the browser is trying to connect to the server on is blocked by a firewall.

3. Network issues: Sometimes, issues in the network can also cause ERR_CONNECTION_REFUSED errors. For example, if your router is not configured correctly, or there is a problem with your network connection, you may not be able to establish a connection to the server.

4. DNS issues: The ERR_CONNECTION_REFUSED error can also occur if the browser cannot resolve the domain name of the target server. This may be caused by a DNS server issue or a problem with the local DNS cache.

In order to solve the ERR_CONNECTION_REFUSED error, you can take the following measures:

1. Check the server status: Make sure the target server is started and running normally. You can try to access the server through other means, such as using SSH to connect to the server and check the process status.

2. Check the firewall settings: If the server firewall is causing the error, you can try to modify the firewall settings to allow access to specific ports or IP addresses.

3. Check the network connection: Make sure the network connection is working properly and there are no problems. You can try restarting the router or resetting network settings.

4. Clear the DNS cache: If a DNS problem causes the error, you can try clearing the local DNS cache. On Windows, you can run the command "ipconfig /flushdns" to clear the cache. On Mac, you can use the "sudo killall -HUP mDNSResponder" command to clear the cache.

In short, ERR_CONNECTION_REFUSED is an error caused by the browser being unable to establish a connection with the target server. To To solve this problem, you need to check the server status, firewall settings, network connection and DNS configuration. Taking appropriate measures according to the specific situation can solve this problem and load the web page normally .

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