Re: What do you consider acceptable packet / session modification for a network operator?

[Ca By via NANOG <nanog () lists nanog org>]

On Fri, Dec 26, 2025 at 8:44 AM andrew--- via NANOG <nanog () lists nanog org>
wrote:

> So the tl;dr I'm getting from this is that
>
> - I don't think anyone considers this 'acceptable' for an ISP
>
> - Everyone knows that AT&T does it anyway
>
> I haven't found any documentation on how or why AT&T is actually doing
> this, so it's all either very old or they've scrubbed it from the internet
> (I know they deleted their whole forums, and it seems like some of the
> discussion was formerly there)


If you google the term “middlebox”, you will see a lot of research on it
from 10 years ago. It was a hot topic of academic and commercial pursuit,
but time has proven it is boring for both



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