How to Fix :Possible DHCP DOS attack seen on the esx host

DDOSAttack

Symptoms
In NSX-v 6.4.0, you see these symptoms:

  • You see the error: “NSX Alert :Possible DHCP DOS attack on host. (ScreenShot Attached)
    NSX Alert DHCP DOS Attack

Cause

This issue occurs because a new DHCP DoS related security feature was introduced in NSX-v 6.4.0, that may report false positives.

Resolution
This is a known issue affecting VMware NSX for vSphere 6.4.x. Currently, there is no resolution.

Workaround

To work around this issue, disable these warning messages. You can disable these warning messages NSX Manager Central Command Line Interface.

  1. Login to The NSX Manager SSh Console via Admin . Check the Status for the Event Notification
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