Using a Realtek NIC with OPNsense

Mon, 21 Apr 2025 17:17:46 -0400

For the past few years, I’ve been running pfSense (and more recently OPNsense) in a virtual machine within Proxmox. This has been running fine with a single onboard Intel NIC. A few months ago, I upgraded to a machine that has a CPU that supports hardware-accelerated transcoding, has more SATA ports, and has more PCI slots for future expansion. With the goal of having a dedicated NIC for WAN, I bought an inexpensive 1Gbps PCIe NIC (TG-3468) despite reading about some of the concerns around Realtek NICs (sluggish performance, driver instability, and in some cases system crashes).

I’ve been running a Realtek NICs reliably on Linux and Windows desktops, so I figured I could make it work without too much effort, but it turns out Realtek NICs really can be problematic when it comes to FreeBSD-based routers, and commonly documented workarounds did not solve my problems.

Nic on davegallant.ca

Using a Realtek NIC with OPNsense