On 2006-09-15, Janto Dreijer <[EMAIL PROTECTED]> wrote:
> I have a server with a static "public" IP and a client behind a NAT. I
> would like to send UDP packets from the server to the client. So what I
> need to do is open up a "hole" in the NAT and let the server know the
> target IP and port of the client where it can send its packets.
>
> Now I have read somewhere that you can have TCP and UDP running on the
> same port.
True.
> Not sure if this is true.
It is.
> Would it be a reasonable solution to initiate a TCP connection
> from the client to the server and somehow (?) let the server
> figure out how the client is connecting? And then send UDP to
> client over the same (IP, port)?
I doubt that will work unless the firewall has been
specifically designed to recognize that pattern of activity and
allow the incoming UDP packets. I don't think most firewall
have default rules that allow UDP packets to tunnel back along
a TCP connection.
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