look for BGP routes containing local AS#
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Song Li
refresh.lsong at gmail.com
Tue Jan 27 15:16:48 CET 2015
For example, My AS# is 23910 and the 'local AS' is 23910. If our BGP router received a route from the BGP neighbor AS1 with the AS-PATH: 1 .* 23910, then the route is what we are looking for. 在 2015/1/27 22:05, Carlos M. Martinez 写道: > Can you clarify what do you mean by 'local AS' ? > > regards > > Carlos > > On 1/27/15 11:48 AM, Song Li wrote: >> Hi everyone, >> >> Recently I studied the BGP AS path looping problem, and found that in >> most cases, the received BGP routes containing local AS# are suspicious. >> However, we checked our BGP routing table (AS23910,CERNET2) on juniper >> router(show route hidden terse aspath-regex .*23910.* ), and have not >> found such routes in Adj-RIB-In. >> >> We believe that the received BGP routes containing local AS# are related >> to BGP security problem. Hence, we want to look for some real cases in >> the wild. Could anybody give us some examples of such routes? >> >> Thanks! >> >> Best Regards! >> -- Song Li Room 4-204, FIT Building, Network Security, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China Tel:( +86) 010-62446440 E-mail: refresh.lsong at gmail.com
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