I am trying to connect a shinyapp hosted on shinyapps.io to an Azure VM that hosts a PostgreSQL instance. When connecting to this PostgreSQL instance locally access is restricted via a VPN.
To bypass that we whitelisted the shinyapps.io IP addresses (shinyapps.io Documentation - Applications):
However, when trying to connect from shinyapps.io, the database connection does not materialize and the connection times out.
Are there any reasons why this might be occurring?