I have private Ethereum network running on my local network with two sealer node and one bootnode. I have deployed the private blockchain and configured it using geth. Now I want to create another node from another network to connect to that private blockchain deployed. How can I do that if I want to access a contract from the new node?

  • It two different networks, you cant reach one from another. Dec 20, 2018 at 8:28
  • @Зелёный can't the new node be created using the external Ip of the bootnode?
    – ludo
    Dec 20, 2018 at 8:36
  • It's confusing when you say "another network". In most blockchain ecosystem, "another network" would refer to the difference between the Ethereum mainnet and another network like Ropsten. These 2 networks can't simply be connected. I'm assuming in your original post that you mean the literal definition of network, as in connecting a node over the internet to your local network?
    – natewelch_
    Dec 20, 2018 at 18:39
  • @flygoing I meant connecting a new node that belongs to a different local network to my private blockchain like connecting my pc at home to another pc in the office network
    – ludo
    Dec 20, 2018 at 22:06

1 Answer 1


You need to use same genesis file for both private-networks and keep the networkId same.

The from first node type:


  enode: "enode://7622844520524910d2ca3036c7e2e912a441ebfc13fad8d759046abe1a9d664cf5e09c5edb765ee0cfe64d64645f1b1b16cc6b2d1c4ec557e5eb96f09335f066@[::]:30312",
  id: "7622844520524910d2ca3036c7e2e912a441ebfc13fad8d759046abe1a9d664cf5e09c5edb765ee0cfe64d64645f1b1b16cc6b2d1c4ec557e5eb96f09335f066",
  ip: "::",
  listenAddr: "[::]:30312",
  name: "Geth/PrivateChain1/v1.8.7-stable-66432f38/linux-amd64/go1.10",
  ports: {
    discovery: 30312,
    listener: 30312
  protocols: {
    eth: {
      config: {
        byzantiumBlock: 0,
        chainId: 193,
        eip150Hash: "0x0000000000000000000000000000000000000000000000000000000000000000",
        eip155Block: 0,
        eip158Block: 0,
        homesteadBlock: 0
      difficulty: 4595264,
      genesis: "0xf6e5dec52d779d6f64e2962f4a60fb5e7072fc6d15935cf7425278b7784016f9",
      head: "0x5a26608afb28b4418c23d808f1df35a8f0baff0f193dcba3d102c25f83d84fe3",
      network: 1902

From node2:

To add node 1 in peer list of node 2, you need to pass enode info of node1 in addPerr function. Replace [::] with IP of node 1. Use localhost if running both nodes on same machine.


Then you can access smart contracts of node1 from node2.

  • PS: I have not tried it though but it should work. Dec 20, 2018 at 8:42
  • Here I use a private bootnode for each node discovery on the network1. Is there a need to pass enode info of node1 to node2 of the external network?
    – ludo
    Dec 20, 2018 at 8:52

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