Comment by deng

1 month ago

> That whole section is talking about outbound connections

Erm... no? Immediately after the paragraph you cited, it continues with

   The key behavior to describe is what criteria are used by the NAT to
   filter packets originating from specific external endpoints.

and then, on "Address-Dependent Filtering", it says

    Additionally, the NAT will filter out packets
    from Y:y destined for the internal endpoint X:x if X:x has not
    sent packets to Y:any previously [...]. In other words, for receiving packets from a
    specific external endpoint, it is necessary for the internal
    endpoint to send packets first to that specific external
    endpoint's IP address.