How to solve the problem that Linux port 8080 cannot be accessed

The solution to the inaccessible Linux port 8080 is: 1. Check the firewall configuration and open the corresponding port; 2. Make sure that the service that needs to use the 8080 port has been started correctly and is monitoring the port; 3. Check the network settings , make sure the Linux host can connect to the network normally; 4. Try to run with administrator privileges or use the sudo command to start the service; 5. Try to change the service configuration to use a different port.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

When port 8080 on Linux cannot be accessed, there may be several common reasons and solutions:

1. Firewall configuration problem: The firewall rules on the Linux system may block access to Access to port 8080. You can use the following command to check the firewall configuration and open the corresponding port:

• Check the firewall status: sudo ufw status or sudo iptables -L

• If the firewall is enabled, you need to open port 8080: sudo ufw allow 8080 or sudo iptables -A INPUT -p tcp --dport 8080 -j ACCEPT

2. The service is not started or there is a listening error : Make sure that the service that needs to use port 8080 has been started correctly and is listening on this port. You can use the following command to check whether the service exists and listen on port 8080:

sudo netstat -tuln | grep 8080

3. Network connection problem: Check the network settings to ensure that the Linux host can connect to the network normally. And the client can establish a connection with the host.

4. Address binding permission issue: By default, only the root user or users with specific permissions can bind port numbers lower than 1024. If you try to listen to port 8080 as a normal user, it may fail. You can try running with administrator privileges or using the sudo command to start the service.

5. Other occupied port issues: If other processes are already using port 8080, access will fail. You can try changing the service configuration to use a different port.

To sum up, the reasons for being unable to access port 8080 on Linux may include firewall configuration, service startup issues, network connection issues, permission restrictions or other occupied ports, etc. Carry out corresponding investigation and resolution according to the specific situation.

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