Today had wanted to use ssh port forwarding but the command life and death do not remember ..
No way to switch to firewall-cmd for processing
method:
1. First turn off the firewall can not
systemctl enable firewalld
systemctl restart firewalld
2. permanently open port access
firewall-cmd --permanent --add-port=80/tcp firewall-cmd --permanent --add-port=80/tcp
3. Add port forwarding
--permanent --add-cmd-Firewall-Forward = Port Port = 80 : proto = TCP: toport = 3000 to the local server 3000 the content through the port 80 exposed service port
4. Re-reload
firewall-cmd --reload