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Mellanox ConnectX-2 pfSense Drivers

Pre-Compiled Kernel Modules for Mellanox ConnectX-2 / pfSense 2.4.4

For whatever reason, the drivers for this (very cost-effective) 10GBit SFP+ expansion card are not included in pfSense. Additionally, pfSense does not include the necessary compiler to build these modules from source.

To get the ConnectX-2 working under pfSense, I had to build the kernel modules for it from source on a separate FreeBSD 11 machine. To potentially save someone else this hassle, I've decided to upload these pre-compiled kernel modules to GitHub.

Instructions:

  • Unzip the Mellanox.zip file (under Releases) somewhere on your pfSense host.
  • Copy all of the *.ko files within to /boot/kernel/
  • chmod 555 /boot/kernel/ml*.ko and chmod 555 /boot/kernel/linuxkpi.ko to ensure the new modules have the proper permissons.
  • kldload mlx4en to load the module - after doing this, pfSense should detect the card as a new interface
  • After making sure the driver works properly, edit /boot/loader.conf and append mlx4en_load="YES" to load the driver on boot.
  • Success!

Compatibility

  • Tested on pfSense 2.4.4 (FreeBSD 11.2-RELEASE-p3) amd64
  • I cannot guarantee this will be compatible with your system, but it should work on any pfSense release based on FreeBSD 11
  • Tested with Mellanox ConnectX-2 but this set of kernel modules should also support the ConnectX-3 and ConnectX-4. To enable ConnectX-4 support, you'll probably have to change mlx4en_load to mlx5en_load.