These are the ports the cameras use. As to which are truly necessary I am not sure.
https://support.wyzecam.com/hc/en-us/search/click?data=BAh7CjoHaWRsKwjXZozTUwA6CXR5cGVJIgxhcnRpY2xlBjoGRVQ6CHVybEkicmh0dHBzOi8vc3VwcG9ydC53eXplY2FtLmNvbS9oYy9lbi11cy9hcnRpY2xlcy8zNjAwMzE0Nzk1MTEtV2hhdC1wb3J0cy1hcmUtbmVjZXNzYXJ5LWZvci1XeXplLUNhbXMtdG8tb3BlcmF0ZS0GOwdUOg5zZWFyY2hfaWRJIikwN2FjZmE1ZC1iOGQ3LTQzODUtYjQ4YS05ZmJmZWJkYmU3NzUGOwdGOglyYW5raQc%3D--fbb9f75102b2594aef070de5710db0264de76e24