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I could not find any model number but this: https://ibb.co/9HfLFShq

Like I said, it was working until today.

IIRC that's one of the older models, but you can double check this @ https://gathering.tweakers.net/ in a topic called something like "Het Grote KPN Glasvezel Topic" or whatever it is these days :)

Thanks for the info.

I do not see disconnection for 24h now. But I will check this.

Cable from ONT directly connected to that ethernet card.

Which ONT exactly ?

There were some issues with certain ONT models used by KPN in the past so maybe it's time to replace yours too :)

I could not find any model number but this: https://ibb.co/9HfLFShq

Like I said, it was working until today.

I checked with AI, it was saying cable might be broken however during these I have never touched cable.

And why don't you just try to replace it?

Your log show series of interface downs and ups again:

2026-07-19T13:01:33    Notice    kernel    <6>vlan06: link state changed to UP
2026-07-19T13:01:33    Notice    kernel    <6>igb1: link state changed to UP
2026-07-19T13:01:26    Notice    kernel    <6>vlan06: link state changed to DOWN
2026-07-19T13:01:26    Notice    kernel    <6>igb1: link state changed to DOWN
2026-07-19T13:01:25    Notice    kernel    <6>vlan06: link state changed to UP
2026-07-19T13:01:25    Notice    kernel    <6>igb1: link state changed to UP
2026-07-19T13:01:22    Notice    kernel    <6>vlan06: link state changed to DOWN
2026-07-19T13:01:22    Notice    kernel    <6>igb1: link state changed to DOWN
2026-07-19T13:01:01    Notice    kernel    <6>vlan06: link state changed to UP
2026-07-19T13:01:01    Notice    kernel    <6>igb1: link state changed to UP
2026-07-19T13:00:58    Notice    kernel    <6>vlan06: link state changed to DOWN
2026-07-19T13:00:58    Notice    kernel    <6>igb1: link state changed to DOWN
2026-07-19T13:00:57    Notice    kernel    <6>vlan06: link state changed to UP
2026-07-19T13:00:57    Notice    kernel    <6>igb1: link state changed to UP
2026-07-19T13:00:54    Notice    kernel    <6>vlan06: link state changed to DOWN
2026-07-19T13:00:54    Notice    kernel    <6>igb1: link state changed to DOWN

So yes, this might indicates a broken cable connected to igb1 or any other hardware defect on this interface.

Because it is hard to replace and just rebooting VM fixes the issue. I hardly believe that the cable is the issue.

 I am using my setup nearly for 1 year or so and up until now I was not having this issue (or I did not realize).

My setup: OPNsense running inside of a VM which hosted by proxmox. I have ethernet card passed thorugh that VM. Cable from ONT directly connected to that ethernet card.

Issue: My connection is dropping and it seems I can not get IP address from KPN. If I restart VM issues resolves but it going down again sometimes 5 mins later sometimes 30 mins later. It is same if I unplug and plug ONT. I checked with AI, it was saying cable might be broken however during these I have never touched cable.

logs:
https://pastebin.com/MiXJrpk5

Version:

OPNsense 25.1-amd64

FreeBSD 14.2-RELEASE

OpenSSL 3.0.15

But DHCPv4 servise is stop and not runninng on run command.

This was the issue. After configuring that I could get proper connection in v25.1.

Hello,

I am trying to setup OPNsense for KPN fiberoptic(Dutch ISP) connection however I could not fully succeed it. I did a lot of things that's why I will just write down what I've done and please let me know what I am doing wrong. Spoiler alert I am noob on this!

I have followed this(https://www.tweaking4all.com/forum/other-hardware/kpn-fiber-internet-only-with-opnsense/#post-5874) guide, there are others but they are pretty same. And since I am not using KPN's TV service I did not do that part.

OPNsense running as VM in the bare metal proxmox. I am passing through ethernet card to the VM. OPNsense sees these interface so I think we are good on that.

My infrastructure for KPN:

Fiberoptic is coming from street and enters my home, where it is ending there is black another thing which is slided on the fiber end (I think it is called ONT(?)). From this black box, ethernet cable comes out and enters to the WAN port of the KPN Modem 12.

What I am doing for OPN sense:

Taking that ethernet cable which coming from black box and connecting it to the WAN port of the OPNsense.

1. v25.1
- I've installed this latest version.
- Created a PPPoE point to point and configured it as it configured in the manual I used.
- Assinged this to the WAN.
- In the dashboard, I see that, I have IPv6 and IPv4 in the gateway. But DHCPv4 servise is stop and not runninng on run command.
- My PC also says I have internet connection via ethernet (Wi-Fi closed of course while configuring)
- Try to open a page on chrome:
- I can not access speedtest.net
- I can access google.com and make searches. I could even do speed test of google.
- So, in short tried couple of the, some of them I can access some of them not.
- I have configured 1.1.1.1 and 9.9.9.9 as DNS but result is same as above.
- I have also tried MTU 1500 and couple others(could not remember now) but result is same.
- When I ping google.com, it returns with IPv6 address.
- When I ping 8.8.8.8 it returns 192.168.2.44: Destination host unreachable. That was awkard beacuse that subnet is KPN modem's subnet. OPNsense LAN subnet is default 192.168.1.1. And I am more confused why 8.8.8.8 try to ping 192.168.2.44 because that could be LAN IP of the client.
- Because of this subnet thingy I suspected that ONT is still trying to use old subnet(if it is using even I do not know, noob here remember. :)). So, to reset it I unplugged it for 5 minutes and plugged again. Same, same, same.
-Later on in the KPN modem's page, I've seen some PPP and credentials. So, you know it. Created this time point to point for PPP and used same configuration in the modem however there is option for Modem Connection in PPP and in dropdown there is nothing and without it I could not save the PPP so could not try it. However, all other could succeed with PPPoE that's why I did not chase this one.

2. v24.7
- I thought since interface is different may be I am missing something. So i Just want to follow the guide 100%. So, installed this version.
- I followed the guide completely step by step.
- In the dashboard, I see that, I have IPv6 and IPv4 in the gateway. But DHCPv4 servise is stop and not runninng on run command.
- This time, my PC does not say I have internet connection and I could not access anything.
- 8.8.8.8 again return same subnet, did same thing with ONT, black box.
- Tried same DNS but did not help.
- This time, I have IP on the dashboard but could not even access to google.com

So, that's story of this Saturday.

I'd really appreciate if someone can help me.

I know, log files! But I could not where to get in the GUI. Please let me know where it is and I can attach. So, it'd be easier.