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I am also using PCI passthrough, with a Intel X520-DA2 SFP+ card and FS.COM modules.

Tried with or without PCI passthrough same issue.. :/

That's what I am finding weird.

I am getting no issue if I run 10 GBE between two proxmox hosts directly (without passing by OPNSense).

And this simple 1 GBE test gets slow when I open this traffic monitor.
Iftop consumes a lot of CPU but far enough to make the machine slower, so I can't see where is the bottleneck at this moment.

Thanks for your reply!

Firstly I found out I am averaging to 800 Mbits if I only show LAN.

And concerning your request not I don't have the same speed it's like if nothing happens (like if I don't open the traffic monitor).

So that could be bound to the top talkers?  But how so, do I have something missing hardware side?

Thanks for your reply, sad to see that you didn't find any solution  :'(.

I would love to fix that OPNsense is a good option to me but it's a too big bug for my usage...

Hey everyone,

I am playing around with my OPNSense instance before putting it in production but I really get weird speed issues.

So here is how my infrastructure is :

WAN -> Proxmox -> OPNSense -> Mikrotik 10 GBE Switch -> Proxmox (the same host just going through OPNSense on a different phyiscal interface).

I am testing my network with Iperf between two hosts at 1 GBE.
So it's going like this.

My External host -> WAN -> Proxmox -> OPNSense -> Mikrotik -> Proxmox (Iperf on the proxmox host)
My External host <- WAN <- Proxmox <- OPNSense <- Mikrotik <- Proxmox (Iperf on the proxmox host)


My iperf results are the following :


Now, whenever I open this dashboard (I have no IPS, or any rules activated it's a really basic host).



And my test start's to get really slow :




Okay at first I thought it was an issue with CPU usage both are running (host and client when the traffic overview is open) around 35% it's a 10 core Intel Xeon E5-2680 V2.

Do you have an Idea of what this could be?

Note : I am using the latest OPNSense version, hosted on a virtual machine it's running on Intel NIC's on SFP+.
Locally on the same switch getting 10 GB/s between the hosts.


PS : I hope I posted it at the correct place in this forum.