Some helpfull notes when installing pfSense on your Zotac Zbox CI327.

Install from usb stick

  • Preparing the drive
  • Download pfsense image
  • Write image to drive

Known problems you can run in to.

CI327 has Realtek NIC’s. For the best performance, you need to tweak some settings in the Gui:


  • CHECK Disable hardware checksum offload
  • CHECK Disable hardware TCP segmentation offload
  • CHECK Disable hardware large receive offload

Hanging during boot time

Boot hangs showing the following line:

Timecounter “HPET” frequency 19200000 Hz quality 950

You can solve this by disabling in Bios:
/Features/CPU Configuration/Monitor M-Wait -> disabled


By Stefan

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