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This is absolutely an issue with Xbox Live/Sony PSN or RBLs used by
mail servers for reputation purposes. For better or worse these
systems equate one IPv4 address == one user (and possibly one IPv6
/64 == one user). My opinion is that this may be a reasonable or
"good enough" assumption as long as you put a time limit on the
assumption (so dynamic addresses can be reassigned) and have a rough
idea of what a user means (a household, subscriber circuit, or
similar). But it obviously goes out the window if you have 10 or 20
unrelated subscribers (possibly in different towns) sharing a single
IP address in a 1:many NAT. This may be one of the not-so-obvious
support costs that comes up when one decides to run a CGN.<br>
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<div class="moz-cite-prefix">Mike Lewinski wrote on 11/21/2019 11:05
PM:<br>
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Question: is anyone who is currently suffering this issue also
doing 1:many NAT? Or running a proxy server that might cause
multiple clients to all appear from the same IP address? I
believe NAT might be the cause of one of our customer's
complaints wrt content provider blocking.<br>
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