> On 16 May 2023, at 06:46, Matthew Petach <mpet...@netflight.com> wrote:
> [..]
> I admit, I'm perhaps a little behind on the latest netflow whiz-bangs, 
> but I've never seen a netflow record type that included HTTP cookies 
> or PCAP data before. 

Take your pick from the "latest" ~2009 IPFIX Information Elements:

https://www.iana.org/assignments/ipfix/ipfix.xhtml

One can stuff almost anything in there.

Now if one should, and if one is allowed to.....

There is a reason why the marketing companies that control the general Internet 
moved the browser to HTTPS and are trying to move to using their VPNs/CDNs: 
cannot modify the data to alter or remove the Ad in-flight, and cannot easily 
see anymore what people are even contacting: visibility for the ad network and 
not the ISP (which is mostly a good thing, but not so much operationally ;) )

Greets,
 Jeroen

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