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epiccurious/ban_knots_peers.sh

Last active June 24, 2025 13:34
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Ban Knots peers on the bitcoin P2P network
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ban_knots_peers.sh
#!/bin/bash
#
# Use Bitcoin Core to ban Knots peers
# NOTE 1: Start Bitcoin Core before running this script
# NOTE 2: To schedule runs in Linux, add this line to `crontab -e`:
# */5 * * * * /path/to/ban_knots_peers.sh
set -e
command -v bitcoin-cli >/dev/null ||
{ echo "bitcoin-cli was not found" >&2 && exit 1; }
readonly BAN_TIME='31622400' # 366 days
readonly PEERS_TO_BAN="$(bitcoin-cli getpeerinfo |
jq -r '.[] | select(.subver | contains("Knots")) | .addr')"
for peer in ${PEERS_TO_BAN}; do
peer_ip="$(echo "${peer}" | cut -d: -f1)"
printf 'Banning %s' "${peer_ip}"
bitcoin-cli setban "${peer_ip}" add "${BAN_TIME}"
done
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