Lookup all the NETBIOS and AVAHI names on the local network. And scan for their ssh hostkeys.

scan_net.sh

#!/usr/bin/env bash

ADDRESSES=`sudo arp-scan --localnet --ignoredups --interface=enp0s25 | grep $'\t' | cut -f1`

#echo $ADDRESSES

get_ssh_info () {
  local out err
  {
    out=( $(ssh-keyscan -t ed25519 $1 2>/dev/fd/3) )
    err=( $(cat<&3) )
  } 3<<EOF
EOF

  if [[ -z ${out[2]} ]]; then
          key=""
  else
          key=${out[2]}
  fi

  if [[ ${err[2]} == "Connection" ]]; then
          host_type="refused"
  else
          host_type="${err[2]} ${err[3]}"
  fi

  #echo $type :: $key
}

for ADDRESS in $ADDRESSES
do
  NAME=`wbinfo --WINS-by-ip=${ADDRESS} 2>/dev/null | cut -f2`
  if [[ -z "$NAME" ]]; then
    NAME="-"
  fi
  NAME1=`avahi-resolve-address ${ADDRESS} 2>/dev/null | cut -f2`
  if [[ -z "$NAME1" ]]; then
    NAME1="-"
  fi
  get_ssh_info $ADDRESS
  printf "%-15s | %-15s | %-30s | %-8s | %s\n" $ADDRESS $NAME $NAME1 "${key:(-8)}" "$host_type"
done
echo