Supporting of Broadcast and Multicast in TMG 2010 !

Question

I have installed TMG 2010 SP2 at Windows 2008 R2.
So, as I read TMG blocks as broadcast as multicast.
And such built-in only one way default behaviour is not right.
I want in my own (as user/admin) define whether it is necessary to me or not as following there have to be ability to switch it on/off such option, for example as checkboxes for each network (address range) defined by default/user - one for broadcast and
one for multicast.
So, please add such functionality to kernel mode driver and to service in the next nearest SP or rollup.
And/or tell how is it possible to switch it on at Tmg 2010 SP2 and later.
There are some important services relying on broadcast: NetBios, Dhcp, some Alladin hardkey protection, some special soft.
If somebody of MS techinians will send registry parameter for this or specially designed driver, all will under my responsibility only.

Answer 1

I didn' t find Threat Management Gateway
topic at https://connect.microsoft.com/directory
Please open such topic at  https://connect.microsoft.com/directory.
I will post suggestion or you can do so in your own.
I see this as following: next roll up adding two checkboxes and also two array input fields for Each Rule: multicast traffic checkbox and array where some (one or more) IP addresses can be put and broadcast traffic checkbox with also array input (for example
192.168.0.255 and 255.255.255.255 - both IP, not mask) .
For example, I want to allow out/in (from LocalHost/to LocalHost) for NetBios 137, 138 port services broadcast, but drop out/in Dhcp Broadcast and allow out only
Sentinel HASP License Manager uses port 1947 broadcast. Of, course this example is for/from internal net only
So, and admins/users uses of Tmg only may define in their own or decide whether it is necessary at all and what rule/rules is/are necassary for.
Warning message can be appeared if admin set multicast and/or broadcast checbox for external net (differs from lan and localhost) but if it is necessary admin can continue anyway to do so.
Or may be make global settings (also 2 checkboxes and 2 array input control) but if it set to on, multicast/broadcat will allow if allowing appropriate rule (for examplee for NetBios) exist if drop Dhcp rule exist additionally to NetBios allowing rule, so
multicast/broadcast will be allowed to NetBios nd will not be dropped for Dhcp.
And some changes are necessary to make in kernel mode driver as I suppose.
I can become a first tester. :))))))))
P. S.: At the moment even outgoing traffic with sender IP of LocalHost (for example 192.168.0.100) and destination IP of broadcast (192.168.0.255) is blocked also.