The jar package has been running on the Linux server but the address cannot be accessed. How to solve the problem?

I have run the jar package using the command today

But when accessing locally, I cannot access it, and the security group policy of the cloud service has also been opened accordingly. The corresponding port.

Solution:

Modify the open interfaces of the firewall

iptables -I INPUT -p tcp --dport 8764 -j ACCEPT 8764 为相对应端口

View the open ports of the firewall

iptables -L INPUT -n --line-numbers

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