Messages

1

Network / Re: Cannot connect to a remote IP with TCP

« on: April 17, 2018, 09:28:37 am »

Thank you for the reply.

I've read the FAQ but I don't understand a lot what I have to do about port forwarding.
If my server is behind a NAT (which is currently the case), have I to port forwarding the server by reaching it with UDP packets from the client?

2

Network / Cannot connect to a remote IP with TCP

« on: April 16, 2018, 12:58:34 pm »

Hi 

My problem is quite simple but I haven't found answers on other topics.

I'm trying to connect 2 computers (on different networks) using the public IP of the host :

int main()
{
    std::cout << "Will you host? (y/n)" << endl;

    char answer;
    std::cin >> answer;

    if (answer == 'y')
    {
        // Server side.
        sf::IpAddress ip = sf::IpAddress::getPublicAddress(sf::seconds(3));

        cout << "Server address : " << ip << endl;    // Displays "176.182.85.44" (dummy).
       
        sf::TcpListener listener;
        if (listener.listen(53000) != sf::Socket::Done)
        {
            cout << "Error listening port 53000" << endl;
            return 1;
        }

        cout << "Waiting for clients..." << endl;

        sf::TcpSocket client;
        if (listener.accept(client) != sf::Socket::Done)
        {
            cout << "Client not accepted" << endl;
            return 1;
        }

        cout << client.getRemoteAddress() << " connected" << endl;
    }
    else
    {
        // Client side.
        sf::TcpSocket server;

        std::cout << "Connection to the server..." << endl;

        sf::TcpSocket::Status status = server.connect("176.182.85.44", 53000, sf::seconds(3)); // Always returns sf::Socket::Error.
        if (status != sf::Socket::Done)
        {
            std::cout << "Connection failed" << endl;
            server.disconnect();
            return 1;
        }
       
        std::cout << "Connection to " << server.getRemoteAddress() << " succeed" << endl;
    }

    return 0;
}
 

If I run this code on my local network (using 192.168.*.* or 127.0.0.1), it works perfectly.
But impossible to connect 2 computers over the network, even when I turn off the firewall on both sides !
Indeed, on the client I always get a "Connection failed" (server.connect() always returns sf::Socket::Error).
On the server side no connection is detected, it sticks to "Waiting for clients..."

I don't know if it is ISP related or anything else. Maybe somebody could help me? Thanks a lot