I think the general stance, at least in my opinion, is that it may be acceptable for a non-fixed broadband service (e.g., cell phone service), while it is not for a fixed broadband (FTTP or otherwise). I fully expect CGNAT, a basic level of packet mangling in an effort to maximize performance on the cell network, etc., while I am hopping between several different cell towers in an area along with thousands of other users, in an effort to improve the experience of services commonly used on a cell phone… but not so much if I am sitting in my house, connected via my own network, to a wired broadband connection.
> On Dec 25, 2025, at 5:44 PM, andrew--- via NANOG <[email protected]> > 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) > _______________________________________________ > NANOG mailing list > https://lists.nanog.org/archives/list/[email protected]/message/NFUAW4XI2Z3UGC2OHIO457D6KSNWMJU6/ _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/J3ZFZOA4MU5UBIO3UBJQNGMKYDMUGWTR/
