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Java : How to connect to ServerSocket using router public IP?

I'm trying to connect to server socket in java using my router's public ip,
first, I tried by simply configuring server socket to localhost, like this,
server = new ServerSocket(5000);
It is working on localhost but not working on trying internal ip 192.168.1.6
then, I tried configuring server socket to the internal Ip (saw this solution), code is as follows,
int backlog = 5;
server = new ServerSocket(5000, backlog, InetAddress.getByName("192.168.1.6"));
and it is working as my devices are connected to same network, I can connect to this Ip 192.168.1.6 from a device with Ip 192.168.1.5 on the same network but when I use public ip of my router from client side, connection is getting timed out, I've done port forwarding,
What am I doing wrong here? any help is appreciated, thanks in advance.
EDIT :
I came to about NAT-loopback (saw this solution) as I was trying to connect using public ip while being on same network so I tried different network but still it is not connecting, connection is getting timed out.

Firstly replace your port number by 8080, which is the default port for HTTP when you are not root. Then you have to open the port 8080 on your router to allow the client to connect.
Your server must be connected to the Internet and have a public IP address. Then the client can connect to this public IP address.

What port use stomp protocol?

Spring Boot app is hosted on default port server.port=8080 and when I connect to the server, JS client's code calls the same port new SockJS('http://localhost:8080/api/streams'); but port use after connection established for WebSocket?
I suppose data exchange for websocket\stomp work on a different port. But wheat is number?

WebSocket uses the HTTP connection, so it can use that port 8080, or a more normal port 443 (secure) or port 80 (insecure) connection.
A WebSocket connection is established by making an HTTP connection, then asking to upgrade the connection to a WebSocket connection.
As Wikipedia says it:
WebSocket is distinct from HTTP. Both protocols are located at layer 7 in the OSI model and depend on TCP at layer 4. Although they are different, RFC 6455 states that WebSocket "is designed to work over HTTP ports 443 and 80 as well as to support HTTP proxies and intermediaries," thus making it compatible with HTTP. To achieve compatibility, the WebSocket handshake uses the HTTP Upgrade header to change from the HTTP protocol to the WebSocket protocol.

By default there are acceptor elements configured to accept STOMP connections on ports 61616 and 61613.
https://activemq.apache.org/components/artemis/documentation/latest/stomp.html

Java Socket connection getHostName

I am testing on java.net.ServerSocket.
What I want is the following.
When connecting to aaa.com, you get aaa.com,
Getting bbb.com when connecting to bbb.com.
My etc/hosts file configuration is as follows.
127.0.0.1 aaa.com
127.0.0.1 bbb.com
I used the following java source.
ServerSocket server = new ServerSocket(port);
Socket request = server.accept();
request.getInetAddress().getHostName();
And when connecting to aaa.com, aaa.com is returned.
When connecting to bbb.com, aaa.com is returned.
How can I get bbb.com when connected to bbb.com?

This code is not connecting to anything. It is accepting connections from ... something.
So ... I presume that you have some client code (not shown) that is connecting to port port using hostnames "aaa.com" and "bbb.com" respectively. And you want this server side to know which hostname that the client side used.
It is not possible.
The client resolves the hostnames to an IP address and then makes the connection using the IP address (and only the IP address). Since the IP address is the same in both cases, the server side cannot distinguish the two cases.
It follows that if the application level of the server needs to know the hostname that the client used to make the connection, then the application protocol must pass this information from the client to the server. (That is what protocols like HTTP, FTP and so on do.)

Socket IO - how to configure and connect to netty socket io server on a secure domain

I need some help with doing netty socket io over https. I have got it to in my local env but not on a server with secure domain. The server starts but client isn't able to connect. Tried by starting the socket server with IP as well as domain name. For the server to start with domain name as hostname value in setHostname method, I added an entry in /etc/hosts file as following
127.0.0.1 localhost example.com
Socket server started by giving example.com as hostname but client isn't able to connect using the same hostname over https as following
var socket = io.connect('https://example.com:10443')
Tried with options - { secure: true, reconnect: true, rejectUnauthorized : false } too but the same issue.
On server side my configuration is as following
Configuration configuration = new Configuration();
configuration.setHostname("example.com");
configuration.setPort(10443);
configuration.setKeyStorePassword("mypassword");
InputStream stream = getClass().getClassLoader().getResourceAsStream("keystore.jks");
configuration.setKeyStore(stream);
The jsk file was created using keytool command for the same domain (example.com)
Is there something more to be done for the port - 10443 to be used by the socket server? Or is there any other configuration to be done?

Got the solution! I had not mentioned that the domain was set up on cloudflare. Here the issue was with the port I used - 10443. It's not supported by cloudflare. Changed it to 8443 and it worked!
For those who come across this, please find here the list of supported ports that Cloudflare work with. May save much of your time unlike me.
Also, please note that I used my public IP as hostname in setHostname() method so that I don't need anything added in my hosts file. Then gave the actual domain name with https on client side to connect to the server. That's it. Thank you all!
Sandeep

Could not connect to glassfish ip address on windows server 2008

I have developed a servlet and deployed it on my server -windows server 2008-
the server have an ip and the port of the glassfish 3.1.2 server is 11188, when i call the servlet from the local host it works fine, but when i call the server via the ip address this error shown could not connect to NN.NN.NNN.NNN:11188 ;N: is a number.
How do i solve this issue?

Open the port 11188 in the firewall.

I was forget to define the port 11188 on the approved ports on the hoster control panel