Question: can not access port 8080
solution:
Step 1 View Ali cloud port is open
Network Security> Security Group> Configuration Rules> Add-in direction
The second step to see whether the firewall is turned on (only said to open a case firewall)
Check firewall status: systemctl status firewalld
Check which ports are open firewall: firewall-cmd --list-ports
Add firewall port 8080: firewall-cmd --zone = public --add-port = 8080 / tcp --permanent
Restart the firewall: systemctl restart firewalld.service
Re-view open ports
So far the problem is solved
About firewalls commonly used commands:
1. Check the firewall status: systemctl status firewalld
2, turn off the firewall: systemctl status firewalld
3, the boot is disabled: systemctl disable firewalld
4, Power On: systemctl enable firewalld
5, restart the firewall: systemctl restart firewalld.service
6, to see which ports are open firewall: firewall-cmd --list-ports
7, open a port: firewall-cmd --zone = public --add-port = 80 / tcp --permanent
--zone # Scope
--add-port = 80 / tcp # Add port, the format is: port / protocol
--permanent # permanent, this parameter does not restart after failure