#!/bin/bash

target_ip=$1
check_ip_config='/usr/local/etc/scripts/custom.fail2ban-check-ip.conf'

test -s "${check_ip_config}" && . "${check_ip_config}"
function check_ip_in_ipset() {
  for list in "${check_ip_lists[@]}"; do
    /sbin/ipset save "${list}" | grep -qE "${target_ip}" && return 0
  done
  return 1
}

check_ip_in_ipset