Hi list, If I understand correctly, packets sent to the all-ones broadcast address only go out through a single interface.
My question is threefold: 1. Why doesn't Linux send 255.255.255.255 packages through all network interfaces? (I realize that this is probably not a Linux-specific question.) 2. How does it choose which interface to send through? My first guess was that it just took the first Ethernet interface and used that for broadcasting. But playing around with nameif, this seems not to be the case. 3. Can I set the default broadcast interface explicitly? For example, say I wanted broadcasts to go out over eth1 by default, instead of over eth0. What if I wanted them to get sent through tap0? Yes, I know that what I *should* be doing is just send the packages to the broadcast address specific to the network where I want them to go. (That is, I should be sending them to 10.255.255.255 instead of 255.255.255.255 if I want them to be broadcast to the 10.0.0.0 network.) Unfortunately, this is not a viable option in my case, as I'm dealing with a closed-source application that unconditionally sends broadcasts to 255.255.255.255. Ideally, the application would let me choose which interface to broadcast to, but alas it does not. I've tried searching for a solution to this problem on the web and on IRC with no luck, so now I'm turning to you guys. Thanks in advance, -- Daniel Brockman <[EMAIL PROTECTED]> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/