Firewall Interface?

[Zackey_TNT]

Hello Proxmox Community. I'm extremely new to proxmox and linux in general, so please go easy on me

I'm having difficulties configuring a firewall to allow ports 30000-30004 tcp out on one specific VM.

The difficulty is, while I can add a rule without an interface, it doesn't appear to do anything. When I try to add an interface from the host (the adapter name which in this case is enp3s0f0) I'm stopped with this error.


I tried adding vmbr0 as an interface as well, same error.

I've also tried using net0 (the network adapter of the VM) and while that does allow me to proceed, it does not open the ports.

Any advice on this?

 

[lhorace]

While this maybe useful, it isn't clear if in fact, your properly enabled Firewall on PVE. IIRC, one needs to go through hoops of check marks to enable it. Lastly, do you have iptables enabled in the container and/or Virtual Machine? What is the output of 'iptables -S' on the hypervisor?

 

[LnxBil]

I tried adding vmbr0 as an interface as well, same error.

You VM does normally have only one virtual network device, so leave it just empty.

 

[spirit]

you should use net0 for vm first interface, net1 for vm second interface ,.... (It's match net id from vm config)
If you don't specify interface, it's apply to all interfaces.