I have a very simple server written in C and an equally simple client written in Java. When I run them both on the same computer everything works, but when I try to run the server on computer A and the client on computer B, I get the error IOException connection refused from the java client. I can't seem to find out whats happening, any thoughts? I've even turned off the firewalls but the problem still persists.

server.

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define PORT 3557
#define BUF 256

int main(int argc, char *argv[])
{
    struct sockaddr_in host, remote;
    int host_fd, remote_fd;
    int size = sizeof(struct sockaddr);;

    char data[BUF];

    host.sin_family = AF_INET;
    host.sin_addr.s_addr = htonl(INADDR_ANY);
    host.sin_port = htons(PORT);
    memset(&host.sin_zero, 0, sizeof(host.sin_zero));

    host_fd = socket(AF_INET, SOCK_STREAM, 0);
    if(host_fd == -1) {
        printf("socket error %d\n", host_fd);
        return 1;
    }

    if(bind(host_fd, (struct sockaddr *)&host, size)) {
        printf("bind error\n");
        return 1;
    }

    if(listen(host_fd, 5)) {
        printf("listen error");
        return 1;
    }

    printf("Server setup, waiting for connection...\n");
    remote_fd = accept(host_fd, (struct sockaddr *)&remote, &size);

    printf("connection made\n");

    int read = recv(remote_fd, data, BUF, 0);
    data[read] = '\0';
    printf("read = %d, data = %s\n", read, data);

    shutdown(remote_fd, SHUT_RDWR);
    close(remote_fd);

    return 0;
}

client.

import java.net.*;
import java.io.*;

public class socket {

    public static void main(String[] argv) {
        DataOutputStream os = null;

        try {
            Socket socket = new Socket("192.168.1.103", 3557);
            os = new DataOutputStream(socket.getOutputStream());
            os.writeBytes("phone 12");

            os.close();
            socket.close();

        } catch (UnknownHostException e) {
            System.out.println("Unkonw exception " + e.getMessage());

        } catch (IOException e) {
            System.out.println("IOException caught " + e.getMessage());
        } 
    }
}