Proxmox on Dedicated Server Hetzner with OPNSense

[Dexter23]

Hello Guys
I reach the maximum amount of 6th of additional single ip adress i can have for 1 server on proxmox, but i need more public ip so i bought addtional subnet/29.

On proxmox i have many many VM's, and in particular one is running OPNSense.
Proxmox Network is configure like this:
enp8s0(physical nic)
vmbr0(LAN)
vmbr1(WAN)bridge with enp8s0
vmbr2(LAN2)
vmbr3(LAN3)

In the robot panel on protzmox i have my addtional single ip addresses with the same mac address of the main ip
i don't request a separate MAC Address for each single ip address.

In OPNSense i add this ip in Interfaces>VirtualIP on the WAN Interface and everything works has expected.

But for the subnet i order i can't get it to work
i attach the screenshot of my Hetzner Robot Panel IP:
I configure one of the ip from the subnet like single ip adress on OPNSense in Virtual IP's but not work.

 

[Dexter23]

I fix jut adding one ip from the subnet on the host system(proxmox) with this command:
ip address add 203.0.113.41/29 dev vmbr0
Now the question is how to make this change permanently?

This is the actual configuration of this file /etc/network/interfaces

auto vmbr1
iface vmbr1 inet static
address 65.108.90.81/26
gateway 65.108.90.1 > Proxmox Main IP
bridge-ports enp8s0
bridge-stp off
bridge-fd 0
#WAN

For add seconday ip without gateway at this interface (vmbr1) i need only to add this:

iface vmbr1 inet static
address 65.108.90.81/26
gateway 65.108.90.1 > Proxmox Main IP
address 135.184.162.1/29
bridge-ports enp8s0
bridge-stp off
bridge-fd 0
#WAN

Or i need to add all the structure like this?

iface vmbr1 inet static
address 65.108.90.81/26
gateway 65.108.90.1 > Proxmox Main IP
bridge-ports enp8s0
bridge-stp off
bridge-fd 0

iface vmbr1 inet static
address 135.184.162.1/29
bridge-ports enp8s0
bridge-stp off
bridge-fd 0
#WAN

 

[Testani]

it does not make sense, are u sure you ar enot struggling in vlan stuff?

 

[Dexter23]

Hi now it works
I only add the first avaiable ip from subnet range to the bridge vmbr1 that is connected to the physical ethernet port and now everything it works.
but i dont know how to add the edit permanently in /etc/network/interfaces how i wrote above.