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You are here: Home / Fusion / Quick Tip - Disable network traffic monitoring (promiscuous) UI prompt in VMware Fusion

Quick Tip - Disable network traffic monitoring (promiscuous) UI prompt in VMware Fusion

07.23.2024 by William Lam // Leave a Comment

While working on some demos planned for my VMware Explore session, Tech Deep Dive: Automating VMware ESXi Installation At Scale [CODEB1574LV], I kept getting this network monitoring prompt when powering up my Nested ESXi VM running in VMware Fusion.


Since Nested ESXi requires the use of promiscuous mode (for inner-VM networking), you will be prompted to approve of the request or networking will be disabled. For demo purposes, you probably do not want this prompting and I was wondering if this could be disabled. After a quick ping in our internal VMware Hosted Google Space, I learned that we can disable the UI prompt by adding a VMX option to the VM.

To disable the network monitoring prompt, add the following to your VM's VMX file:

ethernet0.promptForPromisc = "FALSE"

For inner-VM networking, you still need to add the following configuration file (per Engineering) by running the following command:

sudo touch "/Library/Preferences/VMware Fusion/promiscAuthorized"

More from my site

  • ESXi-Arm V2 Easter Egg
  • Native MAC Learning in vSphere 6.7 removes the need for Promiscuous mode for Nested ESXi
  • Enable TRIM/UNMAP from Nested vSAN OSA/ESA to physical vSAN OSA
  • vSAN ESA HCL hardware mock VIB for Nested ESXi
  • Easier method to simulate custom ESXi SMBIOS hardware strings

Categories // Fusion, Nested Virtualization Tags // fusion, Nested ESXi, promiscuous mode

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William is Distinguished Platform Engineering Architect in the VMware Cloud Foundation (VCF) Division at Broadcom. His primary focus is helping customers and partners build, run and operate a modern Private Cloud using the VMware Cloud Foundation (VCF) platform.

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