On Tue, Oct 23, 2012 at 9:18 AM, Mike Jones <m...@mikejones.in> wrote: > IPv4 addresses ending in .0 and .255 can't be used either because the > top and bottom addresses of a subnet are unusable. > > Why would hetzner be making such assumptions about what is and is not > a valid address on a remote network? if you have a route to it then it > is a valid address that you should be able to exchange packets with, > any assumptions beyond that are almost certainly going to be wrong > somewhere.
As to why: I suspect they don't know either. I wouldn't be surprised if it was someone's misguided attempt years ago to stop smurf amplification attacks, long since forgotten. I'm not saying it's a good idea (it's not), just why I suspect someone would do this.
