Problem with QTcpSocket version Qt 5.1.0

[aymen090]

Hi everybody,

I have started a QTcpServer for listening like this
server->listen(QHostAddress::Any,53210)
and it has start listening correctly
but, when I connect with Qtcpsocket from another IP (not local)
with this code
socket->connectToHost("IP_REMOTE",53210)
An error has appear (socket Timeout).

Another information to help, when I connecti with 3G modem (don't use NAT), connection has been establish well.

Any help?

[mcosta]

What is the value of IP_REMOTE??

[aymen090]

the public IP of the correspondant for exemple 41.xxx.xx.xx
I found that the correspond when he open the port (Port forwarding) 53210, the connection it will establish.
Do you knew how Can I open the port automatically.

[aymen090]

No one have solution?

[SGaist]

Hi,

You can't open ports like that. It's in the domain of network setup (i.e. firewall modification etc...)

[aymen090]

Are there another solution? Like skype or programs peer to peer, how these programs work?