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Egress, i.e. data traffic transferred from the cloud environment, is not free. The egress costs depend on the type of connection and on the amount of egress data. Ingress, e.g. data traffic into the cloud environment is often free of cost. See How to calculate the right Azure outbound capacity and choose the best egress option. Egress can be, partly, configured in the Delft-FEWS. Also the location of the operator client Operator Client (in the cloud or on-premise) effects the egress. See How to calculate the right Azure outbound capacity and choose the best egress option.
Type and number of machines
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Securing your cloud assets requires continuous investment in keeping your containers safe. An infamous example of malconfigured Kubernetes has been Tesla's unsecured admin console for a Kubernetes cluster (Lessons from the Cryptojacking Attack at Tesla). This led to malicious actors getting hold of credentials for Tesla's wider AWS environment who used it for cryptomining. Tesla highlighted that it was a test instance "only", but this incident shows why it's really important to secure both production and pre-production resources as far as possible.
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