filtergen software package provides packet filter generator for various firewall systems, 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 filtergen
filtergen is installed in your system.
Make ensure the filtergen package were installed using the commands given below,
$ sudo dpkg-query -l | grep filtergen *
You will get with filtergen package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Network |
| Package | filtergen |
| Version | 0.12.8-1 |
| Description | packet filter generator for various firewall systems |
| Sub Section | Net |