On 16 Sep 2016, at 20:12, Simon Lockhart wrote:

Has anyone else come up against the problem, and/or have any suggestions on how best to resolve it?

I'm pretty sure that at least part of it has to do with DDoS-related activity. The best bet is to try and identify and engage with the relevant operational personnel with clue. Going the customer-service route isn't fruitful, as you indicate.

Another aspect is ensuring that one has the ability to detect, classify, traceback, and mitigate outbound badness southbound of the CGN.

This sort of thing has always been a problem with NAT; as CGN becomes more prevalent on wireline broadband networks, it's only going to get worse.

AFAIK, PSN doesn't support IPv6. That would be another topic of discussion with the operational folks.

Roland Dobbins <rdobb...@arbor.net>

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