As far as I am aware the ports 30303/TCP and 30303/UDP, 30301/UDP have to be accessible from the internet in order to run an Ethereum node.

I am running Parity and am sitting behind a firewall which only opens a small set of ports for me.

Is it possible and if yes how to change the ports using Parity?

1 Answer 1


Have you tried the following parity cli options?

  • --port PORT Override the port on which the node should listen
  • --jsonrpc-port PORT Specify the port portion of the JSONRPC API server
  • set the port to 0 to get an automatically generated one, like with Mist
    – Ronen
    Jun 13, 2017 at 13:47

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