Unable to connect to my C# server from an other pc

Question

I have a server and a client app, the server throws no exception and seems to listen properly but the clients aren't able to connect for some reasons, I tried with both local network and public IP.

-With local network's IP I can connect to it only when the client app is runned on the same computer than the server.

-With public IP nothing can connect to the server.

However in both cases when the connection fails, it behaves always the same : waits for aproximately 5-10 seconds and then throws System.Net.Socket.SocketException . I tried with port 1507 first then tried with port 80 but it didn't change anything

Server

IPAddress adress = IPAddress.Parse(MyIp);
TcpListener listener = new TcpListener(adress, 80);
listener.Start();
TcpClient Client = await listener.AcceptTcpClientAsync();

Client

TcpClient client = new TcpClient();
client.ConnectAsync(IPAddress.Parse(MyIp), 80).GetAwaiter().GetResult();

I don't understand where the problem comes from, is it coming from my code or not? If not the what could it be and how could I fix it?

Answer 1

Have you tried Telnet from outside network on specific port? If you can't connect probably is router port redirection or access is blocked by firewall.