Proxmox without external network

[anyone21]

Hello everyone,

Yesterday I had to format my home server (changed board and CPU) and lost internet conetivity on proxmox host.

I have my physical server with two network cards.

enp3s0 -> Home network
enp1s0 -> External

So on proxmox I have a opnsense vm that access the enp1s0 interface and routes it to internal network through enp1s0 interface

My interfaces file is:

auto lo
iface lo inet loopback

auto enp3s0
iface enp3s0 inet manual

iface enp1s0 inet manual
#WAN

auto vmbr0
iface vmbr0 inet static
        address 172.27.1.3/24
        gateway 172.27.1.1
        bridge-ports enp3s0
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 1-4094

auto vmbr99
iface vmbr99 inet manual
        bridge-ports enp1s0
        bridge-stp off
        bridge-fd 0
#WAN

On any VM I have with tag vlan 1 and connected to vmbr0 I have internet connection and all goes well, on my proxmox host I can access through internal network but it doesn't have internet connection

172.27.1.3 is the proxmoxhost and 172.27.1.1 is the opnsense vm internal network card.


Am i Missing something here?

 

[Hannes Laimer]

Hey,

looks like the host (127.27.1.3) does not tag its traffic. You probably want to move the IP assignment from vmbr0 to vmbr0.1

auto vmbr0.1
iface vmbr0.1 inet static
    address 172.27.1.3/24
    gateway 172.27.1.1

so the host traffic is tagged.

Alternatively bridge-pvid 1 is also an option, this basically tags everything untagged entering the bridge with 1, so it wouldn't have to be done for every VM. But usually that's not what you want.

 

[anyone21]

Hello,
Thanks for the help Hannes, the vmbr0.1 trick solved my problem!