Connect airbyte to mongodb instance

Hello everyone

I am trying to connect airbyte cloud to a mongoBD instance within my fly.io cluster.
The connection from my local environment works but Airbyte is unable to connect because I need to whitelist their IPs.
Has anyone tried to use airbyte cloud with their fly.io cluster?
Has anyone succeeded in whitelisting IPs on a fly.io cluster?

Thank you for your help
Saad