I am having trouble with UDP broadcast datagrams. I have a small VB6
test app that binds to
0.0.0.0 on port 6200. It sends a datagram to
"255.255.255.255" on port 6201. There is a second socket that is bound
to port 6201 on the same address. All computers receive this datagram
except for the computer which sent it. FYI the computer is running
Windows XP SP2 v.2149
If I run this same application on any other computer on the network
(even Windows Vista), the sending computer receives the datagram it
has broadcast, so the problem is confined to only one computer.
I have tried the same example in C# as well, so the problem is
definitely on a lower level. Just to be clear specifically sending to
the IP address of any interface on the machine does work and the
message is received, it just does not receive broadcast messages it
has sent itself. It also received broadcast messages sent from another
computer.
