A script for dropping connections from old version nodes or other characteristics

Drop Non-Useful Nodes

This script is written for linux.

1. Download the file

2. Review it

    nano ./dropnonusefulnodes.sh

3. Mark it as executable `chmod +x dropnonusefulnodes.sh`

4. Run it

    ./dropnonusefulnodes.sh

CTRL+C to stop it.


If you want to run as a background service, you can start with the basic template 
file dropnonusefulnodes.service.  You will need to change the user and ExecStart
to match wherever you've downloaded the script.  The user needs to already have
access to the bitcoin-cli command, and the script assumes it can make local
calls.

dropnonusefulnodes.service

# dropnonusefulnodes systemd unit to kick nodes that you dont like
# /etc/systemd/system/dropnonusefulnodes.service

[Unit]
Description=Drop connections to non-useful bitcoin nodes
StartLimitIntervalSec=600
StartLimitBurst=2
Wants=bitcoind.service
After=bitcoind.service

[Service]
WorkingDirectory=/home
ExecStart=/home/admin/dropnonusefulnodes.sh
User=admin
Restart=on-failure
RestartSec=30
PermissionsStartOnly=true

[Install]
WantedBy=multi-user.target

dropnonusefulnodes.sh

#!/usr/bin/env bash

timedelay=30
dropordisrespector=1
dropknots=1
dropapollo=1
dropold=1
dropothers=0

myversion=$(bitcoin-cli getnetworkinfo | jq -r .subversion)

# start our loop
while true; do
  j=$(bitcoin-cli getpeerinfo)

  # Drop any node that doesnt match my version
  if [[ $dropothers -eq 1 ]]; then
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("'${myversion}'")|not)|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  fi

  # Disconnect any node that is an Ordisrespector
  if [[ $dropordisrespector -eq 1 ]]; then
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Ordisrespector"))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  fi

  # Disconnect any node that is running Bitcoin Knots
  if [[ $dropknots -eq 1 ]]; then
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Knots"))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  fi

  # Disconnect any node that is running Apollo
  if [[ $dropapollo -eq 1 ]]; then
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("FutureBit-Apollo-Node"))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  fi

  # Disconnect any node that is an old vulnerable version
  if [[ $dropold -eq 1 ]]; then
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.21."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.20."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.19."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.18."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.17."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.16."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.15."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.14."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.13."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.12."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.11."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.10."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.9."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  for a in $(echo "${j}"|jq -r '.[]|select(.subver | contains("Satoshi:0.8."))|.addr'); do
    bitcoin-cli disconnectnode ${a}
  done
  fi

  # give it a rest for a bit
  sleep ${timedelay}
  done