Ports can be open either incoming, outgoing or both. Connections may be
established on the same port in both directions, or on independent inbound
and outbound ports. Download ethereal and watch your tcp/udp traffic. It
will gove you a lot of insight.

....kurt

"Peter Eisenman" <psallach@landsend.com> wrote in message
news:436dfc5f$0$21941$9b4e6d93@newsread2.arcor-online.net...
> Assume we look an a certain port say, port number 1234.
>
> Are there TWO different ports 1234 - one for the outgoing direction and
> one for the incoming?
> Or is there only one port which can be used only in one direction at a
> certain time: either
> as incoming or outgoing?
>
> If the ladder would be true then an already established incoming
> connection on port 1234 would block
> any outgoing connection on the same port.
>
> Peter