PFSense on KVM Proxmox - Suricata/Snort performance issues

  • Hello,

    We just installed our pfsense instance on a KVM VM on a Dell R410, with 2 Xeon x5570 CPU's, for a total of 8 cores and 16 threads.

    On our old machine, (Dell R310), we didnt have any performance issues with Suricata or Snort.

    however, now we do. We only get 300-400mbps out of our 1G connection. Without these services enables, we get our target 950mbps

    Would you have an idea why?
    FYI, we have hardware checksum offloading disabled