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Setup Firewall ​

It is imperative that all nodes have the P2P port 5120 open for both incoming and outgoing connections on TCP and UDP. This P2P port facilitates communication between nodes, thereby forming a network.

  • 5120/tcp
  • 5120/udp

API Node ​

To operate an API node, it's necessary to enable the API ports 8545 and 8546 for incoming TCP connections.

Incoming ​

  • 8545/tcp RPC connections
  • 8546/tcp Websocket connections

System Firewall ​

Your system may have a firewall enabled. Usually, it is ufw on Ubuntu and firewalld on Redhat.

Check the status of your firewall.

shell
sudo ufw status
shell
sudo firewall-cmd --state

If the firewall is not running, you can skip this step.

Open the P2P port for incoming and outgoing connections.

shell
sudo ufw allow 5120/udp
sudo ufw allow 5120/tcp
shell
sudo firewall-cmd --add-port=5120/tcp --permanent
sudo firewall-cmd --add-port=5120/udp --permanent

Optional: Open the API ports if you're running an API node.

shell
sudo ufw allow 8545/tcp
sudo ufw allow 8546/tcp
shell
sudo firewall-cmd --add-port=8545/tcp --permanent
sudo firewall-cmd --add-port=8546/tcp --permanent

Cloud Firewall ​

If you are running your node on a cloud provider, you may have a cloud firewall enabled.

Each cloud provider has a different way of managing their firewall. Please refer to your cloud provider's documentation on how to open ports.