Allowing Broadcast (either LAN or Global)

I always thought that a broadcast went to very IP in the sender's subnet and that the UTM just dropped the packet sent to it.  Isn't that what's happening?

Cheers - Bob 

Hi Bob,

yep, you're right.

I can get the LAN Broadcast to be allowed but am unable to find a way to get the Global Broadcast to be allowed inside the UTM.

well that's not entirely true, there are 5 Global Broadcasts being transmitted, only one is allowed (e.g. it is going green) the other five are dropped automatically.

** I may need to learn about global broadcasts, as I think I am missing something obvious to do with global broadcasting.

thanks for you response

I'm not sure where these broadcasts are coming from or what "going green" means, but does How to fix the global broadcast address (255.255.255.255) behavior on Windows help?

Cheers - Bob

I'm not sure where these broadcasts are coming from or what "going green" means, but does How to fix the global broadcast address (255.255.255.255) behavior on Windows help?

Cheers - Bob

Hi Bob,

apologies I didn't explain myself, the 'going green' is the firewall live log, and when a packet is applied an allow rule it goes green ... see image

and the article you reference is for windows but this app is on Linux (unfortunately it is a global broadcast, i think due the the developers). I have since got around it (global broadcast) by placing a switch in between the server and the UTM.

on a side note, the image above is the same source (server IP) and destination (255.255.255.255) for all three but only one has the rule applied, this is where I said I need to understand the Global Broadcast.