How to block apps from connecting to internet

Apps and Virtualization
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1

I’m running TrueNAS Scale 25.04.2.1.

I want my TrueNAS system to connect to the internet for downloading apps and updates, but I do not want some of my apps to be able to connect to the internet (or really, anything outside its container).

I’ve read a number of forum posts discussing the issue, but haven’t seen a straightforward solution to this. I’ve considered blocking traffic via firewall rules, but I don’t see any way to differentiate between TrueNAS traffic I want (e.g. downloading updates) from traffic I don’t want (e.g. traffic from apps that don’t need internet access).

Any ideas would be greatly appreciated.

2

The only solution at this point, AFAIK, is to run your apps (at least those you don’t want to access the Internet) in a VM.

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