Ethereum: Why your bitcoind demon does not listen to the RPC port at 8332

As an Ethereum developer, you are probably not alien to the complications of running several cases of the Ethereum node behind a reverse proxy. However, when you try to use Bitcoin-CLI (the official command line tool for the Bitcoin network interaction) outside the local network, problems arise because of how the RPC (remote procedure call) is managed by bitcoind. In this article, we will deepen the reason why you may not listen to Daemon bitcoily on the RPC port 8332 and explore potential solutions.

Why not listen to my bitcoind daemon on the port of RPC 8332?

The default settings for the Ethereum node demon allow them to listen to one of the three RPC ports: 8332, 8541 (default) or 7890. The problem here consists in how you access the local court outside the network.

When you use bitcoin-cli from a different host from where it runs bitcoindly, you must explicitly specify the port number, as follows:

`Bash

Bitcoin -cli -rpCport 8332

The-RPCportoption tells Bitcoin-Cli to listen to the specified port. This command allows you to access the local court using theBitcoin-Cli.

Alternative approaches

If you have problems with default settings, here are some alternative methods to listen to Daemon Bitcoind on RPC port 8332:

• Use the-RPCUSER and -RPTY

  options: you can pass these options to specify a username and a non-standard password for the remote procedure server. For example:

Bash

Bitcoin -cli -RpCport 8332 -Rpcuser myuser -rpty

This will allow you to access the local court usingBitcoin-Cliwith a different username.

• Use a personalized RPC port : If you execute more bitcoindic courts, you can specify a custom port number for each court. For example:

Bash

Bitcoind -RPCPORT 8333

This will allow all the courts to use the samerpCport, but with different usernames and passwords.

Why is this happening?

The reason why Daemon bitcoind could not listen to the port of RPC 8332 is probably due to the wrong problem or a compatibility problem. Here are some possible reasons:

* Host Firewall rules : If you run bitcoindly behind a host firewall, you may have blocked the connections received on the default port (8331).

* Port conflicts : If more bitcoindic courts are running on the same car with different RPC ports, they could interfere with each other.

* RPC server problems : The official Bitcoinrpc server may not be configured correctly or may not be available for remote access.

Conclusion

To solve the problem and listen to your daemon bitcoind on the port of RPC 8332 when you use bitcoin-cli from a host from where it runs bitcoindly, try one of the following approaches:

• Use-RPCporta option with explicit port number

• Pass the -Rpcusr and ‘-Rpty` options to specify a custom username and password

• Use a custom RPC port for each instance

By addressing these potential problems, you should be able to listen to the Daemon bitcoind on the RPC port 8332 when using Bitcoin-CLI outside the local network.

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