North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Who is announcing bogons?
On Mon, 28 Apr 2003, Sean Donelan wrote: > > On Mon, 28 Apr 2003, Rob Thomas wrote: > > ] Rob, on the other hand, has gained a lot of trust in maintaining > > ] a highly accurate list. > > Thanks very much. :) I can't accept all the credit though. My thanks > > go out to all the members of Team Cymru. > > Unfortunately, no good deed goes unpunished. Jon Postel did a great > job maintaining the list of IP addresses. Paul Vixie did a great job > with the first Real-Time Blackhole List. But people move on, and things > change. > > But my real question is why are negative bogon lists necessary? If you > ask providers, they all say they implement positive prefix list filters > on all their customers. So who is injecting the bogons? And why do they > still have a network connection? > > Should we be spending time teaching people how to do positive prefix > filters, or trying to explain to them why the negative prefix filter > the last network administrator installed 2 years ago is out of date. > > What is the cross-over point? When does the number of lines in a bogon > list become larger than the positive prefix filter? If you are going to > list every sub-allocation which isn't routed, why not just list the > allocations which should be routed? Alternatively monitor the BGP table and pull out the bogons then produce a list of them along with AS path info, possibly sending out to the list to the upstreams as well as nanog. Steve
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