Proxmox Setup with 1 Public IP

A guide on how to setup proxmox with 1 Public IP and the guest VM will get or use Private IP from DHCP

Requirements

• A dedicated server (you can get it from Fiberstate), some others may work but may need additional tweaks to hardware identifiers

• A SSH Client (we used MobaXterm but you can use PuTTY or OpenSSH or the built in SSH client)

Server Preparation

We recommend to get this server spec (R9 7950X)

Input your desired Hostname and Password, and for the Operating System choose Proxmox (latest)

They have double drive promo on going, drop your invoice number to their forum thread here

Go to your web browser and access your proxmox web console by accessing this URL https://<SERVER_IP>:8006 and use root as username and the password you set previously

Additionally, you can run this script for post installation setup for basic proxmox tweak

bash -c "$(wget -qLO - https://github.com/community-scripts/ProxmoxVE/raw/main/misc/post-pve-install.sh)"

Prepare SDN function

Login to your server via SSH and run this command

apt update
apt -y install dnsmasq
# disable default instance
systemctl disable --now dnsmasq

Make sure you have this line in your /etc/network/interfaces file

source /etc/network/interfaces.d/*

type the following command to check

cat /etc/network/interfaces

If source /etc/network/interfaces.d/* is present, proceed; if not, add it to the file by using this command

printf "\n\nsource /etc/network/interfaces.d/*" >> /etc/network/interfaces

Creating SDN Network (Private IP)

Go to your Proxmox web console and go to Datacenter > SDN > Zones > Add > Simple

Tick the Advanced option, put ID with any name you like (in this case we use cnid) and tick the automatic DHCP

Go to SDN > VNets and Create

Input the any name (in this case vnet1) and select the zone that you created previously (in this case cnid)

Click on the newly created vnet and on the right side, click create

Input your own Subnet and Gateway, you can customize it or just follow, and then go to DHCP Ranges

Click Add and input your desired IP range (in this case 10.100.0.100 - 10.100.0.200 ; more than enough) then Create

After this setup, go to SDN and click Apply

After that go to IPAM and you can manage your DHCP reservation (this image taken from my running server)

Download OS Image

Go to local storage > ISO Images > Download from URL

We will download ubuntu 24.04 iso for later VM setup

Input this https://releases.ubuntu.com/24.04.2/ubuntu-24.04.2-live-server-amd64.iso to URL field and click on Query URL

you can rename the file if you wish and click Download

Now you've done the server preparation, we will continue to VM Setup

VM Setup

Simply click on Create VM button on top right of your interface

General

Tick on Advanced box > tick on Start at boot > put the server name > Next

OS

Select local storage > choose the ISO Image that you downloaded in previous step > Next

System

Just next, nothing to change there

Disks

Select local-lvm in the Storage section > put 100 for Disk size > Next

CPU

Set Sockets and Cores depends to your need and Type to host for the best performance > Next

Memory

Set the Memory depends on your need > Next

Network

Select the bridge that you created previously > Next

Confirm

In the confirmation page, you will see the summary of the VM. Optionally, you can tick Start after created so it will start immediately > Finish

OS Installation

After VM Creation, go to Datacenter > your server name > Console

Continue the installation as prompted

Done

Done

Done

Done

Done

In this part, remember to allocate all your disk space

Select ubuntu-lv > Edit

Set maximum Size and then Save > Done > Continue

Input your name, server name, username and password > Done

Continue

Mark to Install OpenSSH Server > Done

Tick any features you want to install (in this case, I skipped everything) > Done

Wait for the installation process until it's completed > Reboot Now

If you see this screen, just press ENTER

After that, go to Hardware menu > select the ISO Image drive > Remove > Reboot once again

Now you have created a VM and it's ready to use

Repeat the process for more VM, or can use Clone VM option