North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: What is the most standard subnet length on internet
BGP Hijacking. Fully peered network A accepts routes from its peers based on prefix allocation to AS maps. Network B, which is either pathological (criminal, or bent on censorship) or lacking clue, propagates /24 subnet of Network C's CIDR (Pakistan/YouTube anyone). If network A accepts Network B's announcement, then connectivity from network A to the /24 announced by Network B (which isn't really connected to network B) is either lost, or worse, hijacked. >-----Original Message----- >From: Nathan Ward [mailto:[email protected]] >Sent: Monday, December 22, 2008 5:45 PM >To: nanog list >Subject: Re: What is the most standard subnet length on internet > >On 23/12/2008, at 2:39 PM, Joe Provo wrote: > >> On Tue, Dec 23, 2008 at 02:34:39PM +1300, Nathan Ward wrote: >> [snip] >>> Let me rephrase; Are there people who are filtering /24s received >>> from >>> eBGP peers who do not have a default route? >> >> of course. > > >Curiously, it was really meant as a rhetorical question where the >answer was "no". > >Why are people doing this? Are they lacking clue, or, is there some >reasonable purpose? > >-- >Nathan Ward > > > >
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