Your firewall must allow the following ports. TCP ports must allow incoming connections and the UDP port must allow both incoming and outgoing connections.
Mainnet:
Purpose | Protocol | Port | Flag |
---|---|---|---|
DHT | UDP | 18467 | -p |
REST | TCP | 18469 | -r |
WS | TCP | 18466 | -w |
Heartbeat | TCP | 18470 | -b |