On Wed, Sep 9, 2009 at 4:31 PM, Michal Zalewski <[email protected]> wrote:
> Well, let's say the server has an internal IP of 1.2.3.4, and along
> with several other nodes in its cluster, is publicly NATed to 4.3.2.1.
> The client says PASV, and the server, unless explicitly aware of its
> current public IP, replies along the lines of:
>
> 227 Entering Passive Mode (1,2,3,4,200,200)
>
> NAT device should rewrite this to 4,3,2,1, and may also need to tweak
> the port to avoid collisions with holes punched for other hosts.

Ah, right.  I was only considering the browser's point of view :-),
since a server responding with an incorrect address would be broken
from the point of view of the Internet.

--Amanda

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