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Ok I found the problem - static needed to be changed to manual as well as removing the IP auto vmbr1 iface vmbr1 inet manual # address 192.168.0.254 # netmask 255.255.255.0 #network 192.168.0.0 #broadcast 192.168.0.255 #gateway 192.168.0.1...

Thanks snowman66 however this still does not change anything, the vmbr1 is still inactive without an IP address and the VM's still fail to start due to vmbr1 not existing!

If I remove the IP on the bridge vmbr1 then proxmox does not enable the bridge and VM's fail to start with the error "bridge 'vmbr1' does not exist". I have changed my settings above as follows. Have I misunderstood what you are saying about not assigning an IP to the bridge? # network...

Thanks, I think that gives me enough to get my setup right. :)

Thanks for the feedback. I also agree that a firewall should be on a dedicated device however I'm not in a position to have that luxury :( I realised that I should have put the firewall on the host node after I had set it up on the VM but was trying to save myself some work by independently...

Hi, My understanding of network bridges is not great and I have done the following setup but I'm not sure how to now add firewall protection to my proxmox box. Any advice would be appreciated. My setup: Proxmox installed on a Physical Machine with 2 physical NIC's and configured to use eth0...