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bitcoind – Cannot hook up with Bitcoin RPC on DigitalOcean server

I’m operating bitcoind on a DigitalOcean droplet with public IP handle e.g. 1.1.1.1.

I wish to hook up with it through RPC from one other DigitalOcean droplet with public IP handle e.g. 2.2.2.2.

Each Droplets are operating Ubuntu Linux 18.04.

~/.bitcoin/bitcoin.conf on 1.1.1.1:

datadir=/mnt/vol1
disablewallet=1
rpcbind=1.1.1.1
rpcuser=x
rpcpassword=x
rpcallowip=2.2.2.2/32
server=1

netstat -ln | grep 8332 on 1.1.1.1 yields:

tcp        0      0 127.0.0.1:8332          0.0.0.0:*               LISTEN
tcp6       0      0 ::1:8332                :::*                    LISTEN

RPC instructions on 1.1.1.1 resembling ./bitcoin-cli -rpcuser=x -rpcpassword=x -rpcconnect=localhost -rpcport=8332 getnetworkinfo return usually.

Nonetheless, on machine 2.2.2.2, after I run ./bitcoin-cli -rpcuser=x -rpcpassword=x -rpcconnect=1.1.1.1 -rpcport=8332 getnetworkinfo I get:

error: Couldn't hook up with the server 1.1.1.1:8332

Ensure that the bitcoind server is operating and that you're connecting to the proper RPC port.

Machine 1.1.1.1 has firewall guidelines in DigitalOcean as follows:

Kind        Protocol        Port Vary      Sources
SSH         TCP             22              2.2.2.2/32
Customized      TCP             8332            2.2.2.2/32

Word that SSH into 1.1.1.1 from 2.2.2.2 is working simply wonderful.

sudo iptables -L on 1.1.1.1 provides:

Chain INPUT (coverage ACCEPT)
goal     prot choose supply               vacation spot

Chain FORWARD (coverage ACCEPT)
goal     prot choose supply               vacation spot

Chain OUTPUT (coverage ACCEPT)
goal     prot choose supply               vacation spot   

Is there something clearly mistaken in my configuration or setup?

Operating curl -v 1.1.1.1:8332 on 2.2.2.2 instantly returns with:

* Rebuilt URL to: 1.1.1.1:8332/
*   Attempting 1.1.1.1...
* hook up with 1.1.1.1 port 8332 failed: Connection refused
* Failed to hook up with 1.1.1.1 port 8332: Connection refused
* Closing connection 0
curl: (7) Failed to hook up with 1.1.1.1 port 8332: Connection refused

which from what I’ve learn seemingly signifies a firewall challenge.

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