Get ip client is connecting to?

Question

Hi!
I've a problem, i want to get the ip the client is using to connect to my server (i'm behind a router).
For example: A client is connecting to my server on network (ip: 192.168.2.3)
Server says: You're connecting to ip 192.168.2.3
A client is connecting to my server on Internet (ip: 84.xx.xx.xx)
Server says: You're connecting to ip 84.xx.xx.xx.
(I don't want to fetch the public ip from whatsmyip.org)
Thanks in advance
Edited by: [email protected] on Oct 14, 2008 12:17 PM

Answer 1

[email protected] wrote:
To bad =/ thanks for your help!Well itz not tht bad if you think of employing a signed applet which still makes things possible for us.
You can think of implementing something similar as stated below.
Sample Signed Applet:
=====================
public class ClientApplet extends JApplet{
  protected ParamBean pb;
  static protected class ParamBean implementes java.io.Serializable{
       private String sessionId = "";
       private String servletUrl = "";
       private String redirectTo = "";
       /** Setters & Getters for the respective fields*/              
  public void init (){
    pb = new ParamBean();
    pb.setSessionId(this.getParameter("SESSION_ID"));
    pb.setServletUrl(this.getParameter("SERVLET_URL"));
    pb.setRedirectTo(this.getParameter("REDIRECT_TO"));
  public void paint(Graphics gr){
    setBackground(Color.white);
    int cde = this.sendDetails();
    if(cde == 200)
       this.dispatchApplet();
    else{
      gr.drawString("Cannot Pass On the details",25, 30);  
  protected int sendDetails(){
    int code = -1;
    URL servletUrl = null;
    HttpURLConnection urlConnection = null;
    try{
      StringBuffer sb = new StringBuffer();
      sb.append(pb.getServletUrl());
      sb.append(";jsessionid=");
      sb.append(pb.getSessionId()); 
      sb.append("?clientIp=");
      sb.append(InetAddress.getLocalHost().getHostAddress());
      servletUrl = new URL(sb.toString());
      urlConnection = (HttpURLConnection) servletUrl.openConnection();
      urlConnection.setRequestMethod("GET");
      urlConnection.connect();
      code = huc.getResponseCode();     
      urlConnection.disconnect();
    }catch(Exception exp){
    return code;
  protected void dispatchApplet(){
    try{
      StringBuffer sb = new StringBuffer();
      sb.append(pb.getRedirectTo());
      sb.append(";jsessionid=");
      sb.append(pb.getSessionId());
      getAppletContext().showDocument(new URL(sb.toString()));
    }catch(Exception exp){
}Parent JSP Page :
=================
<jsp:plugin type=applet code="ClientApplet.class" codebase="/html">
     <jsp:params>
          <jsp:param name="SESSION_ID" value="<%=session.getId()%>"/>
          <jsp:param name="SERVLET_URL" value="http://www.xyz.com/requestAction.do"/>
          <jsp:param name="REDIRECT_TO" value="http://www.xyz.com/redirect.do"/>
     </jsp:params>
     <jsp:fallback>
          <p>Unable to load login module</p>
     </jsp:fallback>
</jsp:plugin>
-------------------------------now we can write our application code in such a way that "requestAction.do" can get ipaddress by request parameter clientIp
and can scope that within the scope of the HttpSession and use it until the end of user's session.
All you need to make sure is the Client installs this signed applet in his machine while accessing in your application.
Hope the that helps :)
REGARDS,
RaHuL