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How to review information flow?  Does Cisco Netflow offers this?

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Last Modified: 2018-10-18
In one presentation by an IT regulator & Cyber Security Agency,
one slide mentioned about reviewing "Netflow" & a couple of
slides later, it require us is to perform periodic "review of
information flow" :

though I raised if these are related ie by reviewing "Cisco Netflow",
we are deemed to have addressed the requirement to "review
information flow" : the presenter doesn't quite seem to know,
thus I'm clarifying here:
does Cisco Netflow offers a form of documenting information
flow?
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Commented:
I asked the presenter if reviewing the firewall rules (as it shows source & destination)
is good enough: he felt it's more of what data is viewed & entered for the various
IT services.

I tend to think along the line of "top talkers" (ie top sources & destinations of traffic).
Any free tools (PRTG?) that helps us do such reviews is appreciated
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Commented:
is Netflow something we need to purchase or it's free for Cisco customers?
Do we need to configure something on the various Cisco switches/routers to enable Netflow to capture the data?
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Commented:
excellent, let me review this with colleagues & if there's no further
doubts, will close this in two days' time

Author

Commented:
Can the free version of Solarwinds extract & email us the reports of the
Netflow traffic (Top talkers, top Source/Destinations) on daily basis
or can help suggest other free tools that could do this (PRTG)
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Commented:
I am not sure which tool(s) that could satisfy your requirements.
One note - PRTG is not free, it is free up to 100 sensors.