<![CDATA[pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser]]>Hello everyone, I am trying to bring up pfSense 2.7.0 in a Proxmox VM and have it replace my current bare-metal pfSense 2.6.0 instance which has worked (almost) flawlessly for years. The hardware Proxmox is running on is a Protectli VP2420, the internet connection is provided by Deutsche Glasfaser. I followed the instructions here to set up pfSense, and a bunch of other sites like Beechy. As I mentioned my long-standing pfSense installation works flawlessly, so I know this can be done.

This should be a relatively straightforward DHCP6 connection from what I understand from the internet, DG uses a standard but slow DHCP over IPv6. Unfortunately the virtualised pfSense never gets assigned an IPV6 address, or even IPV4 address, on the WAN interface. I have brought up a 2.6.0 VM as well which is also never gets an IP address on WAN. I tried the E1000 NIC in Proxmox to no avail. Previously I ran a pfSense in a VMWare VM so I should be able to figure it out, perhaps I just know enough to be dangerous... Nevertheless, I have studiously compared all settings between my working setup and the new ones, I see no differences. Yes, the 'Allow IPv6' checkbox is checked.

In this site it says to wait 15 minutes for a new DHCP lease and I have waited twice that, power cycled the DG box numerous times, all to no avail.

My working gateway setup looks like this:
53684d1d-eb25-49d2-b193-e6786d1ba35a-image.png
The new installed VMs just say 'Pending'.

Can anyone give me a clue how I can debug this, or is it likely a problem with DG and their DHCP behaviour?

]]>https://forum.netgate.com/topic/183015/pfsense-2-7-0-in-a-proxmox-vm-not-getting-ip-address-from-deutsche-glasfaserRSS for NodeWed, 22 Apr 2026 17:34:39 GMTSat, 23 Sep 2023 16:32:15 GMT60<![CDATA[Reply to pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser on Thu, 19 Oct 2023 16:35:36 GMT]]>@charry2014 said in pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser:

IPv6 gateway shows connected and online but there is no DNS for internet

If you setup IPv6 correctly and there is no DNS, maybe you're suffering as I am discovering ISP gave static IPv6 that doesn't allow LAN to communicate with upstream DVCPv6 server. Please call your ISP.

]]>https://forum.netgate.com/post/1130922https://forum.netgate.com/post/1130922Thu, 19 Oct 2023 16:35:36 GMT<![CDATA[Reply to pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser on Thu, 19 Oct 2023 14:40:36 GMT]]>So, just for the sake of completion to wrap this up cleanly, I found the setup to be a little intricate but now it works. Essentially Beechy's guide is correct and given the changes I outline above the connection came through in some 15 minutes, but perhaps some further clarifications would be helpful.

  1. Forget 6rd, go for DHCPv6 now
  2. In pfSense only configure the IPv4 gateway in System - Routing - Gateways, the IPv6 gateway will appear by magic once the IPv4 has connected. This is how the globe icon appears next to the gateway name -
    1e1fbb75-7812-45be-9505-0f13ccb92a87-image.png
    This bit seems pretty weird, but I am all but certain this is what happened. As an experiment I configured just the IPv4 gateway, and then everything else happened by itself.
  3. If the IPv4 or IPv6 gateway shows connected and online but there is no DNS for internet sites then restart the DG modem
  4. Once IPv4 gateway has connected it is necessary to restart pfSense to get the IPv6 gateway to connect

Then, you will have a full connection. Hope that helps.

]]>https://forum.netgate.com/post/1130895https://forum.netgate.com/post/1130895Thu, 19 Oct 2023 14:40:36 GMT<![CDATA[Reply to pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser on Tue, 26 Sep 2023 11:59:08 GMT]]>You can try that but it's unlikely you can pull more than one DHCP lease from the ISP. Both firewalls would try to do that and that create a conflict.

It's odd that you have to wait like that. The timespan sounds like maybe the old dhcp lease has to expire. That's not something I've seen at any other ISP.

]]>https://forum.netgate.com/post/1127262https://forum.netgate.com/post/1127262Tue, 26 Sep 2023 11:59:08 GMT<![CDATA[Reply to pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser on Tue, 26 Sep 2023 09:24:13 GMT]]>Thank you for your suggestions - I made some progress. There were some configurations I had not made, if these can affect WAN behaviour I cannot tell:

  • In the LAN Interfaces tab - the IPv6 Prefix ID must be set to 56
  • DHCPv6 Server and RA the prefix delegation side must also be set to 56
    These are clearly indicated by Beechy, my mistake.

Then having made these edits I left the new pfSense connected to the DG modem for an hour, and at the beginning of that hour unplugged the power from the DG router for five minutes to give it a clean separation, then it got an IP address on WAN from DG. This was a definite 'test passed' moment 🥳. What was then interesting is when I then reconnected the old pfSense to the DG modem it reconnected the gateways after a while but DNS did not work until I restarted the DG modem. This is inconvenient as my wife (the worst sort of user a network admin can have 😉) works from home and the network must be up basically all the time. Switching between firewalls apparently takes 2 hours at least.

To answer your specific questions - There was nothing in the logs until I turned on 'Start DHCP in debug mode' and then I could see nothing useful, just some general permission errors. The suggestion about the WAN packet counters would be interesting for next time.

Does anyone know if it is possible, or likely to be possible, to put a switch directly onto the DG modem and connect the two pfSense instances to the same modem? This would greatly ease the testing and bring up of the new one.

]]>https://forum.netgate.com/post/1127240https://forum.netgate.com/post/1127240Tue, 26 Sep 2023 09:24:13 GMT<![CDATA[Reply to pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser on Tue, 26 Sep 2023 00:17:59 GMT]]>@charry2014 So, I see you followed the right recipe and if you passthrough WAN as instructed, then you should have logs as to why you're not getting any IP...can you show your logs?

]]>https://forum.netgate.com/post/1127205https://forum.netgate.com/post/1127205Tue, 26 Sep 2023 00:17:59 GMT<![CDATA[Reply to pfSense 2.7.0 in a ProxMox VM not getting IP address from Deutsche Glasfaser on Mon, 25 Sep 2023 22:49:10 GMT]]>What do you see in the dhcp logs? Is it trying and seeing no replies?

Do you see any incoming packets on the WAN packet counters at all?

Steve

]]>https://forum.netgate.com/post/1127198https://forum.netgate.com/post/1127198Mon, 25 Sep 2023 22:49:10 GMT