North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: query about determining ingress interface
On Thu, Jun 20, 2002 at 05:42:23PM -0400, Rajesh Talpade wrote: > Is there a way for an ISP to determine the ingress router interface at > its network border that will carry IP traffic _from_ an IP address not > owned by it? > > I don't want to assume the path is the same in both directions, and tools > such as CAIDA's skitter plot paths from specific sources. One approach > might be deriving network paths from CAIDA's data, perhaps someone has > already done this? Rajesh, Hi there.. Are you asking to determine the interface that "will" or "is" passing said traffic? I think it depends on what you're trying to do- Are you trying to track an individual src at one given point, or collect some stats/trends on where various srcs are entering your network? I.e, for an individual src/dst (maybe you're tracing a DoS, etc..) there are a number of ways to use filters and other mechanisms to log/count packets matching some known charachteristics (src/dst, length, etc..) There are various ways to do things like this, it depends on what exactly you're trying to track though. ..Dylan -- , Dylan Greene , + Juniper Networks + + +1 617/407-6254 + ` [email protected] '
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