Addressing TCP wrapping/Open Ports on certain firewalls causing assets misdetection

How to disable TCP Wrapping/Default Open Ports on certain firewalls that causes asset misdetection in Delve.

Certain Firewalls either do TCP Wrapping or simulate responses on some specific ports, causing Delve do detect potential responding hosts when auto-discovering across network zones.

Typical ports affected are Port 2000, Port 5060, Port 5061, but there might be other ports affected as well.

Fortinet Firewalls:

This issue is especially present with Fortinet Firewalls default configuration, here is the documentation on how to address this issue: