I have a TMG 2010 firewall between some office networks, which handles routing and firewalling; I need to let some application-specific multicast traffic flow between these networks; this is UDP traffic on a custom port (10234), with destination multicast addresses in the form 224.X.Y.Z.
I already followed the steps here, but it doesn't work: TMG keeps complaining about the destination address being invalid.
Denied Connection
Status: An ingoing packet was dropped because its destination address does not exist on the system, and no appropriate forwarding interface exists.
Rule: None - see Result Code
Source: SOURCE NETWORK AND ADDRESS
Destination: External (224.0.1.1:10234)
Protocol: CUSTOM UDP PROTOCOL
1) Can TMG actually route this type of traffic?
2) How?
