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ConnectionException :connect

Abhijith Sugunan

Joined: Aug 04, 2012
Posts: 10
what is the root cause of this error message "ConnectException : Address is invalid on the local machine or port is not valid on the remote machine"....???
Ash Chan

Joined: Jan 09, 2013
Posts: 3
Not a detailed question. Anyway you could be using a reserved port no.?

You can create a server on ports 1 through 65535. Port numbers less than 256 are reserved for well-known services (like HTTP on port 80) and port numbers less than 1024 require root access on UNIX systems. Specifying a port of 0 in the ServerSocket constructor results in the server listening on a random, unused port, usually >= 1024.

Not sure why address is invalid. Try something like this on Client side:

String host="localhost";
int port_number=2229;//sample port no.

clientSocket = new Socket(host, port_number); // static Socket clientSocket = null;
Abhijith Sugunan

Joined: Aug 04, 2012
Posts: 10
Finally i got it correct . The problem is that my firewall blocks the request and it works only in home network mode . It will not work in private and public mode
I agree. Here's the link:
subject: ConnectionException :connect
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