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Posted by nycram on 01/18/07 17:08
Chris wrote:
> On Wed, 17 Jan 2007 21:25:40 GMT AlmostBob
> <anonymous1@discussions.microsoft.com> wrote:
>
> > 'You' decide what numbers you use, and your pc tells the network that
> > those ports are available
> > 'They' decide what numbers they use, and their pc likewise
> >
> > then your pc connects its outgoing port to 'their' incoming port, and
> > 'your' incoming port to their outgoing port
>
> Ok.
> So, assume you have selected (say) port 12345, but they are using the
> default 6699. If your ISP blocks port 6699 will this still block a
> connection from you to them?
No. Your ISP can't block their ports---else the whole internet would
come crashing down because pretty soon nobody could connect to anybody
else. But they can block your ports. If they block your 6699, and you
go to 12345 (a bad choice BTW) you can receive other people's messages
on YOUR chosen port (12345) and they can receive your messages on their
chosen port (no change from before).
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