North American Network Operators Group|
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Re: Broadcast pings.
At 05:32 PM 12/23/97 -0600, Phil Howard wrote: > >When a packet arrives, take note of the interface and gateway it came from. >Check the route tables for where a reply to this packet could be delivered. >Don't choose only the best route, but compare where the packet came from >with all valid reply routes (except broad defaults larger than a certain >size that can be configured). If the packet came from where it is valid >to reply, then allow the packet to proceed. If not, then discard it (an >ICMP probably won't make it back to the right place anyway). > Yes. Some of us call this 'unicast RPF'. Your point is well taken. ;-) - paul