nanog mailing list archives
Re: query about determining ingress interface
From: Dylan Greene <dylan () juniper net>
Date: Thu, 20 Jun 2002 01:38:11 -0400
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 + ` dylan () juniper net '
Current thread:
- query about determining ingress interface Rajesh Talpade (Jun 20)
- Re: query about determining ingress interface Randy Bush (Jun 20)
- Re: query about determining ingress interface Stephen J. Wilcox (Jun 20)
- Re: query about determining ingress interface Vadim Antonov (Jun 20)
- Re: query about determining ingress interface Dylan Greene (Jun 20)
- Re: query about determining ingress interface Rajesh Talpade (Jun 20)
- Re: query about determining ingress interface Dylan Greene (Jun 20)
- Re: query about determining ingress interface Rajesh Talpade (Jun 20)
- Re: query about determining ingress interface Randy Bush (Jun 20)