firewall

  1. M

    vnet firewall configuration not working

    Hello, I am having trouble configuring the Vnet Firewall. I have set up a PoC with two hosts. There is one VM on each host, each of which has a service interface and another interface for the NAS. Two VLANs are configured, one for the service and another for the NAS. The intention is that the...
  2. I

    Access WebUI from VM - Sophos FW

    Hello everyone, I'm a beginner when it comes to networks and servers, so I decided to buy an old server and install Proxmox to improve, I got an HP ProLiant DL160 g6 to which I added an additional NIC, leaving me with a total of 4 ports. After configuring Proxmox I decided to install a Sophos...
  3. K

    VM dont have internet access

    Hello everyone, I reinstalled my proxmox server, which is hosted on herunter, yesterday. I noticed that when I create my VMs, I can't get an internet connection, and therefore can't use them properly. As I said, the problem only started occurring after I reinstalled everything. The entire...
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    Allow user-defined nftables chains to override Proxmox firewall drops within the same hook

    Environment Proxmox VE version: 9.x (nftables backend enabled) Firewall backend: nftables Affected components: proxmox-firewall, nftables chain evaluation order Description When using the Proxmox VE firewall with nftables, multiple base chains per hook (input, forward, output) are created at...
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    LXC firewalls with nftables on Proxmox 9

    Hello everyone, I have just setup a fresh Proxmox 9 install, added a Container and started firewalling the system. I enabled the firewall for the datacenter, the host and the container. Everything works fine except for the container firewall. I can see from the "nft list ruleset" output that the...
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    [SOLVED] Keine Updates möglich - Proxmox hinter Hardware OPNsense

    Hallo. Nach langer Zeit, ich mal wieder mit einem Problem. Seit drei Tagen versuche ich mein Problem in den Griff zu bekommen. Ich stelle grade mein Heimnetz um, mit einer Hardware Firewall vor meinem Proxmox-Server. Dazwischen kommt später noch ein Switch. Da ich den Server neu einrichte...
  7. S

    Which URLs should I whitelist on the firewall to enable OpenID Connect on Proxmox?

    I’m trying to integrate OpenID Connect (OIDC) on my Proxmox server using Microsoft Entra ID (Azure AD). However, by default, internet access is blocked on the Proxmox host via the firewall. To allow OIDC to work properly, which specific URLs or domains should I whitelist to enable authentication...
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    Firewall not working

    Hello guys, My proxmox firewall is not working what I have now: Datacenter: yes and input/output/forward policy = drop Node: firewall=yes NIC: firewall=1 VM: firewall =yes and input and output policy = drop With these settings you think you would not have a internet connection but I have...
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    [SOLVED] Firewall blocks connection to proxmox http port 8006 (web-gui), all other connections are ok

    I use a cloud on internet running proxmox and want to filter some connections for connecting and others for not connecting vms. Typical plan for firewall. Now I got some rules running including nat from inside to outside, pre-nat for vpn outside to inside and some others for dhcp function. But...
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    [TUTORIAL] Proxmox Web UI Inaccessible Across VLANs

    I’m working on a home lab setup where I have my Proxmox server on a separate VLAN from my main home network. The Proxmox box used to live on a different network and worked perfectly fine there, but I’ve since moved it into a segmented VLAN behind a Cisco router. Now, I’m trying to access the...
  11. N

    SSH connection to LXC container dropping when using Ansible

    This is a weird one, as I'm honestly not sure if it's a firewall thing, some kind of out-of-the box security thing or an Ansible thing but here goes: I've got a fresh LXC container that I'm planning to use Ansible to configure. I have setup some firewall rules so that SSH into it just fine...
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    opnsense als VM sinnvoll?

    Hallo zusammen. Wir bekommen demnächst einen neuen Internet Anbieter (Glasfaser 1 Gbit) und in dem Zuge möchte ich statt auf einen Hardware router auf opnsense setzen. Spricht aus Eurer Perspektive irgendwas dagegen diesen auf proxmox VM laufen zu lassen oder würdet ihr aus Gründen...
  13. C

    VM lost internet connection when firewall on

    Hi everyone, I'm encountering an issue where my host-level iptables NAT rule (for VMs on a private bridge to access the internet) stops working when I enable the Proxmox VE firewall on the VM's network interface. Setup: Proxmox VE Host - Dedicated server VMs are on a private bridge vmbr1...
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    Help required with pfsense in proxmox setup. How to get all VLANs to use a single Pihole server

    Hi All, Fairly new to home lab/pfsense, and below is my current setup I have pfsense running on proxmox. Proxmox is installed on a Dell Wyse 5070. It has one inbuilt NIC, that I use for WAN and another 2.5 Gig NIC that I use for my LAN. Proxmox has a bridge (vmbr0) that connects to my 2.5 Gig...
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    IPV6 Neighbor solicitation disappear on PVE vmbr1 but it has been captured on Virtual Machine's interface which bridge the vmbr1

    1.I find that I can capture the IPV6 Neighbor solicitation packet on my virtual machine but on the pve vmbr1 I can not caputre the packet.. My topology is vmbr1 is the linux bridge of enp2s0, and my virtual machine's eth1 is bridge the vmbr1.. please see the attachment of the capture...
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    Minecraft Server and Port Forwarding Fail

    Hi all, I've set up a VM for Minecraft and it appears to be running correctly (from the cli - I don't play). The correct port, however, isn't open. I have a Verizon FIOS router and behind that I have an OpenWRT router and then the ProxMox machine. The FIOS router holds my public IP. The VM...
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    Proxmox 8.3.3. access problems - including VM

    Hello, I am using Proxmox 8.3.3. and after a reboot I cannot access GUI, cannot ping proxmox or any VM (VMs are not online as well). I can reach proxmox server over SSH anr Winscp. There are no errors (I went through previous threads on this subject and all rights to folder and certificates...
  18. C

    Custom firewall rules not loading with proxmox-firewall and nftables

    I have an internal vnet with systems that needed access to the Internet. With the newer proxmox-firewall I was able to create a new table with the necessary rules and save the changes to /etc/nftables.conf but the rules are not loaded at boot. The documentation says this on custom rules: "If you...
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    Proxmox Firewall Blocking Access to Container via Domain Name, but Allows Direct IP Access

    Hello everyone, Let me explain the situation to see if you can help me: I have configured the firewall in Proxmox to access a container running Proxmox Backup Server. The rules I’ve applied to the PBS container are the following: Block any request and protocol from any IP. Allow TCP...
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    [SOLVED] An app having trouble binding ports when installed on host

    I'm trying to get coolercontrold up on my PVE instance. When installed on host and initialized, logs output: IPv4 bind error: Could not bind to standard IPv4 loopback address on port 11987 Is there any sort of firewalling measure on PVE that could potentially cause this?