id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
18799	"VirtualBox 6.0.10 r132072"" Only Allows Port Forwarding for NAT"	Oleg Tsvinev		"How to reproduce:

Use VirtualBox UI
Create a new Linux/Ubuntu 64 bit VM
Open Settings, Network
Select Adapter1
Make sure ""Enable Network Adapter"" is checked
Open ""Advanced""
In ""Attached to:"" select NAT
-> you will see ""Port Forwarding"" button enabled

Now, select anything but NAT in ""Attached to:""

-> you will see ""Port Forwarding"" button DISABLED (greyed out)

Other use case, create a Vagrant with bridged network defined for Bridged Adapter 2.
When using Vagrant with bridged network defined, port forwards are created in NAT, not in Bridged Adapter 2

"	defect	closed	network	VirtualBox 6.0.10	invalid	port forward bridged	oleg.tsvinev@…	Linux	Mac OS X