Disallow ingoing network traffic except gateway

twks

New Member
Nov 16, 2025
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This is probably a newbie question as I am not familiar with the setup yet but what i basically want to achieve is:
I have a single Proxmox Installation with one node.
I have a container that acts as a gateway for all incoming connections. That also works as I have a IP Filter on my router (I am only using IPv6 because of my ISP).
What i want to achieve is that all containers and vms in the node dont have/need a firewall and can communicate with each other.
All incoming traffic from outside the server/node should be disallowed, except for connection to that one gateway container.
Outside traffic should be allowed for everything.
I tried several setups on Node and Datacenter level, but all I can achieve is that either every container is reachable or non (including the gateway).
Can someone help me with that