dnsviz software package provides Tools for analyzing and visualizing DNS and DNSSEC behavior, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dnsviz
dnsviz is installed in your system.
Make ensure the dnsviz package were installed using the commands given below,
$ sudo dpkg-query -l | grep dnsviz *
You will get with dnsviz package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Network |
| Package | dnsviz |
| Version | 0.6.4-1 |
| Description | Tools for analyzing and visualizing DNS and DNSSEC behavior |
| Sub Section | Net |