bidentd software package provides Bisqwits identd for NAT proxying, 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 bidentd
bidentd is installed in your system.
Make ensure the bidentd package were installed using the commands given below,
$ sudo dpkg-query -l | grep bidentd *
You will get with bidentd package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Network |
| Package | bidentd |
| Version | 1.1.4-1.1+b1 [amd64, arm64, ar |
| Description | Bisqwits identd for NAT proxying |
| Sub Section | Net |