Firewall Configuration
Rules that should be added to your machine's firewall
Keep
8545
(or 8000-9000
) closed except for the trusted machines - this is the JSON RPC port which gives admin access to the node.Keep TCP
30303
(or 30300-30400
) open for the outside world so other nodes can connect to your node.Keep UDP
30303
(or 30300-30400
) open for the outside world so other nodes can discover your node.