network

  1. D

    LXC No DNS and Can't Ping Gateway

    Hello all, I've recently started trying to move some services into LXCs, but I am having issues with that appear to be DNS related. I have the Proxmox GUI sitting on a Linux Bridge that is tagged with VLAN 40. I also have several VMs that get tagged for VLAN 40, as they have managment consoles...
  2. S

    Routed Network Configuration with IPv6 Subnet (Hetzner)

    Good evening (or morning), After days of testing and configuring my Proxmox instance, I'm still experiencing issues. I've rented a Hetzner dedicated server which comes with an IPv4 address (which I want to use for my host) and an IPv6 /64 subnet (which I want to use for my host and containers)...
  3. A

    [SOLVED] IP Settings not applying to new LXCs

    Hi, SOLVED - LXC is privileged as per Jellyfin's documentation which disables nesting by default. Adding nesting resolves the issue. I'm trying out Proxmox for the first time and everything was going well but all of a sudden IP settings have stopped working for new LXCs (I haven't tried VMs)...
  4. S

    iptables unknown option "--to-destination"

    Hey all. I'm just getting started with proxmox v9 and been fighting for a while with port redirection. iptable manual says I should use -d or --destination but I get this or this makes no sense to me. it tells me I *must* use --to-destination but when I do use it it says it's an...
  5. K

    [SOLVED] virtualized PVE Host and LXC CT network access

    Hello, I am trying to configure a virtualized PVE host (VMware) with two virtual network cards connected to a firewall (Palo Alto). I do not have access to the VMware level or the Palo Alto configuration (private cloud provider). The goal is to deploy certain CTs on the PVE and a Proxmox...
  6. G

    Proxmox networking on Azure Debian 12

    I am playing with Proxmox in Azure. I set up a vanilla Debian 12 OS with two NICs. I was able to install Proxmox using This Guide and without much fuss. I can create and run both containers and VMs. The issue I am having is with networking, guest VMs and containers are unable to access even...
  7. L

    [SOLVED] Additional network card causes dead network devices

    Hello I've added an additional network card into my proxmox computer. This causes a "device-rotation" (related to the network device names / numbers in proxmox) and a connection lost to the proxmox mgmt-ip. Old naming of the network devices (before inserting the new network card) was...
  8. C

    [SOLVED] Access fabric full mesh network with local VM

    Hello, We operate multiple 3-node clusters. For the VM LAN, each node has 2× 10 GbE ports in a bond. Additionally, each node is equipped with 4× 25 GbE ports, which we’ve used to create a high-speed interconnect between the nodes for fast local migration and replication. On one of the hosts...
  9. X

    Hetzner Netzwerkkonfiguration Routed

    Hallo zusammen, ich habe bei meinem Dedicated Server von Hetzner mehrere IPs bekommen und das Netzwerk sowohl auf dem Server als auch auf einer VM konfiguriert. Die VM läuft unter Proxmox. Problem ist: Auf der VM funktioniert nur IPv6, IPv4 funktioniert nicht. Während der Debian-Installation...
  10. T

    Unable to get outside internet connection. on fresh install

    Hello all, I just set up a fresh install of proxmox on a Dell 3040m. I am able to connect to the server from my local network. Once logged in, I try to install Debian LXC for a helper script, and I get curl: (6) Could not resolve host: raw.githubusercontent.com. I have then tried to ping other...
  11. W

    [SOLVED] VM´s behind VLAN repeatedly lose connection

    Hello, I am currently experiencing an issue with the network of my VMs. My current configuration is as follows: My issue: VMs that are in VLAN 22 regularly lose their network connection (every few seconds). The VMs are Windows Server 2022 trial and Windows 11. VirtIO is being used. Example...
  12. D

    DNS Configuration Issues with IPv6 Link Local for PVE & LXC

    Hello! I just noticed some issues when trying to configure PVE (8.4.5) with a link-local DNS server. #1 - PVE Host I use a AdGuard Home LXC, and want to use it's link-local IPv6 address as DNS resolver for PVE, but I cannot get it to work through the Web GUI. When I edit the DNS settings, and...
  13. S

    Dell AMD EPYC Slow Bandwidth Performance/throughput

    Hi All. We are in a deep trouble. We use 3 x Dell PE 7625 servers with 2 x AMD 9374F (32 core processors), I am facing an bandwidth issue with VM to VM as well as VM to the Host Node in the same node. The bandwidth is ~13 Gbps for Host to VM and ~8 Gbps for VM to VM for a 50 Gbps bridge(2 x...
  14. N

    Initial switch interface does not work

    Hi all, I seem to have found an interesting issue, happened to me 2 out of 2 tries so it can be replicated. Hardware I'm using: Dell PowerEdge R750 with Broadcom NetXtreme Gigabit Ethernet NIC's (tested with the firmware it shipped with and the newest from Dell) Juniper EX4300-48T switch...
  15. A

    Proxmox Networking Daisy Chain USB 3.2 / 4 #Premium Feature

    this is maybe just dumb question because i'm trying easy way and cheapest way to setup proxmox cluster. i have see many people setup homelab using many mini pc. what i see is jumble mesh of rj45 can't the proxmox using usb connection?. nowaday mini pc is coming with many usb port either 3.2 or...
  16. T

    Proxmox Keeps losing internet connection and GUI

    Hi all, I am brand new to Proxmox and I have a server set up and it seems to be dropping connection to the GUI when I start interacting with it especially when uploading files. Could someone please tell me how to fix this? I am ready to provide any info you need from server to help me...
  17. O

    Proxmox randomly losing internet connection

    Hey all, I’m running Proxmox (mainly arr stack and some other media) and recently started experiencing a strange issue where the host intermittently loses internet connectivity. The only workaround I’ve found so far is to unplug the ethernet cable from the router and plug it into a different...
  18. B

    Simple setup IPv6 in Proxmox for LXC or VM in Hetzner

    For each server, Hetzner provides free IPv6 subnets /64 Using Hetzner as an example IPv6 provider, here is a configuration example. Okay, now we have an allocated subnet range::/64 For example, range:: = 2a49:8d8:112:7se1:: Edit Proxmox configuration: nano /etc/network/interfaces Physical...
  19. L

    Bridge loses IP

    Hello, I have a cluster and on one of the nodes for the past few days after every restart i can't ping it. After some troubleshooting i saw that the vmbr0 is losing IP and i have to use ip addr add 192.168.1.240/24 dev vmbr0 so it works again I kept getting power outages that's the reason for...
  20. D

    Proxmox trunk setup with virtual router

    Hello, I'm facing issue with configure vlan for VM's, containers. My setup for now WAN - enp4s0 - bridged to vmbr0 LAN - enp5s0 - bridged to vmbr1 VM Kerio control handle vlans managed switch connected to lan Hosts in local network connected to switch work normally with all vlans, but when...