MindSphere applications running on Cloud Foundry access the internet via a NAT gateway. If you want to enable these applications to access your application server, your inbound firewall must allow the NAT gateway's IP addresses.
Solution
To enable access to your application server, the IP addresses for your firewall settings can be found here:
https://developer.mindsphere.io/howto/howto-selfhosted-integration.html#testing-the-application
Note that there can be temporary situations where the IP addresses provided are not reachable (e.g. in case of a fallback).
Any permanent change will be updated in the documentation provided above.
Notes