Is AS information useful for security?

Eric eric at
Fri Dec 16 02:05:35 UTC 2011

It's useful in terms of remediation as it can help identify through which "door" packets entered your  network.  Though, as others will undoubtedly point out, it's trustworthiness will depend upon how you derive the AS mapping and upon other security features  (e.g. uRPF)

-- Eric :)

> On Thu, 15 Dec 2011, Joe Loiacono wrote:
>> Is a good knowledge of either origin-AS, or next-AS with respect to flows
>> valuable in establishing, monitoring, or re-enforcing a security posture?
>> In what way?

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