VMs Unable to Ping Gateway/Internet But Can Talk to Each Other

[proxmike1]

Hi there. I have spent days working through many threads on the official documentation (https://pve.proxmox.com/wiki/Network_Configuration#sysadmin_network_routed), threads here and all over the internet without luck. I have had to re-image the server multiple times due to loss of connectivity (colocation). Attempting to do Routed Configuration approach. Primary server has one IP address /30 and VMs would be on a separate IP block /29.

Can someone please help me in figuring out what I am setup wrong here?

Server: Debian 12
VMs: Ubuntu 24.04

ProxMox Server "ip a":


ProxMox Server "ip r":


ProxMox Network Config:


ProxMox Network Interfaces File

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet static
        address 172.xxx.xxx.86/30
        gateway 172.xxx.xxx.85
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up echo 1 > /proc/sys/net/ipv4/conf/eno1/proxy_arp

iface eno2 inet manual

auto vmbr0
iface vmbr0 inet static
        address 198.xxx.xxx.241/29
        bridge-ports none
        bridge-stp off
        bridge-fd 0

VPS "ip a":


VPS "ip r":


VPS Cloud-Init file


VPS NetPlan Config


VPS Ping Result: