Java Client won't connect to remote server

Question

Bare with me as it's been a while since I've been on here and I know there's format rules for questions. I have coded two java applications, both are pretty simple. One being a server and two being a client that connects to the server via socket. Now this works on my computer but when I have a buddy run on his computer it doesn't connect. I want the server to be able to run on my computer and anyone who has the client can connect.

The relevant code for the server:

public static void main(String[] args) throws IOException {
// write your code here
    System.out.println("Server Running...");
    int port = 1020, backlog = 5;
    String ipAddress = "2552:548:41aa:c3f0:563c:hgj9:8ca2:b3aa";
    ServerSocket serverSocket = new ServerSocket(port, backlog, InetAddress.getByName(ipAddress));
    Server server = new Server(serverSocket);
    server.startServer();
}

The relevant code for the client:

public class Client{

public String username;
private Socket socket = new Socket("2552:548:41aa:c3f0:563c:hgj9:8ca2:b3aa", 1020);
public BufferedReader bufferedReader;
public BufferedWriter bufferedWriter;
public ChatController chatController;

public Client(String username) throws IOException {
    try {
        this.username = username;
        this.bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        this.bufferedWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
        bufferedWriter.write(username);
        bufferedWriter.newLine();
        bufferedWriter.flush();
        listenForMessage();
    } catch (IOException e) {
        closeEverything(socket, bufferedReader, bufferedWriter);
    }
}

Like I said, this works on my computer but the not when client is on a different computer. My thoughts are that the issue is on the client side, possibly not using an open port? Thank you in advance and let me know if I need to edit if it's not a proper question format.