Netmap is a tool to gather information for a given network and render that on a Hilbert curve as a square image.
The currently sole information source is nmap. It's used to run discovery and port scans and render the information. The following metrics are used to determine the color of a pixel:
- for host discovery scans, the RTT
- for port scans, the number of open ports
This is not an official Google product.
Install:
apt-get install nmap
go get github.com/google/hilbert
go get github.com/finfinack/netmap
go install github.com/finfinack/netmapUsage:
netmap --help
Usage of netmap:
-file string
full path where the generated heatmap should be written to (.jpg or .png)
-help
boolean flag to print this help message
-network string
network to gather data and generate heatmap for in CIDR notation (e.g. 192.168.0.1/24) (default "10.0.1.0/24")
-scantype string
type of scan to launch: hostup, webports, defaultports, allports (default "hostup")
-transparent
boolean flag whether or not to generate a transparent imageThe following runs a host discovery scan against the given network and writes the rendered image out as a PNG.
netmap --file=/tmp/heatmap.png --network=10.0.0.0/16The result may look like the following:
The more "heated" a pixel is, the faster was its response time. The heat gradient is currently set as follows (from cold to hot):
black - blue - cyan - green - yellow - red - white
Copyright 2016 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.