Internal devices not able to reach internal server
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I am having some issues with a Firewall rule and allowing devices to look back into the network. We run a docker container that is running Uptime Kuma. I have a dashboard that is running on a server that is external to our network and points to the container. Everything works fine outside of our network but if someone is inside the network, the app in the container is not viewable.
I have heard of this before where devices can not go out and back in to use a service, just not sure what that is called and how to work around it.
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I had a similar issue recently trying to reach the GUI of my WAP.
I ended up turning on NAT reflection in order to get around it but if there's a rule that works I'm sure the fine folks here will help you out.
You can see my whole conversation here.