In my previous email, I mean "determine the protocol
based on the contents (not based on the destination
port) of the packets before running the packets
through the anomaly detection engines."
Surya
--- Surya Batchu <suryak_batchu@yahoo.com> wrote:
You can't depend on the port. Standard protocols are
being run on non-standard (other than assigned
ports)
ports and proprietary protocols are being run on
standard ports. For a good protocol anomaly
detection, I suggest to determine the protocol first
and pass it through appropriate protocol anomaly
detection engine.
Surya
--- NTR <ntr@intoto.com> wrote:
Hi All,
I am trying analyze NNTP traffic and i have
created
a profile for NNTP
protocol. It's a kind of NNTP protocol anomaly
detection.
I have also observed some time Yahoo Instant
Messenger uses NNTP
port. Though it is using NNTP port the format is
quite different
from NNTP protocol. It is the point where my
parsing engine facing
problem. Each time whenever yahoo connects on
NNTP
port
my parsing engine treats it as NNTP protocol
anomaly
and start generating
alerts. I am looking for some advise or solution
to
solve
this problem. how we should profile NNTP protocol
so that it can
differentiate yahoo traffic from the genuine NNTP
traffic.
Thanks and anticipating early solutions.
Thanks and Regards,
NTR
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