Posted by Chmeee on 01/19/07 04:18

On 18 Jan 2007 09:08:56 -0800, "nycram" <gvellenzer@gmail.com> wrote:

>
>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).

For reference, an interesting list of port number assignments:

http://www.iana.org/assignments/port-numbers

Success here with ports numbered below 1000 (currently 713 & 723).
Numbers in the 4 & 5 digit range seem to work for a short time then
WinMx starts to have connection problems. May be specific to this
ISP.

Chmeee_AB_CDN
2007-01-18

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