OPNSense on Proxmox on Dedicated Server Hetzner

[Dexter_23]

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.

[Dexter_23]

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?

[Cerberus]

In Proxmox UI, add your x.x.x.x/29 on your vmbr0 without a gateway.