How to set up iptables for WebSocket?

Question

iptables

Good afternoon!
Centos-6.5 system, node.js-12.
iptables has simple rules:
iptables -A INPUT -i eth0 -p tcp -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p udp -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
-- - 8080 socket port.
Are there any other rules needed?

Answer 1

On which port the websocket hangs, open it, and that's it.