From their Github
This project implements proximity voice chat in Among Us. Everyone in an Among Us lobby with this program running will be able to communicate over voice in-game, with no third-party programs required. Spatial audio ensures that you can only hear people close to you.
Ports required to run the server in a table format.
| Port | default (HTTPS enabled) | default (HTTPS disabled) |
|---|---|---|
| Game | 443 | 9736 |
Default port is 443 if HTTPS is enabled, and 9736 if not. But you can change to any port or domain/ip in the egg