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Re: query about determining ingress interface
- From: Dylan Greene
- Date: Thu Jun 20 18:04:48 2002
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?
Are you asking to determine the interface that "will" or "is" passing said
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 Greene ,
+ Juniper Networks +
+ +1 617/407-6254 +
` firstname.lastname@example.org '