I'm deploying nginx as a container in a pod so that it can deny non-whitelisted traffic and reverse proxy to another container in the pod (can't use ingress controller for reasons). I need to whitelist other services in my cluster. I'd like to whitelist anything in the cluster but specific services is good.
What allow rules do I specify to let other services proxy through nginx?
You can create isolation for your containers via Network Policies.
But please note:
Network policies are implemented by the network plugin, so you must be using a networking solution which supports NetworkPolicy - simply creating the resource without a controller to implement it will have no effect.