I would like to find out the ip address of the client that is visiting my web pages.
Content of JSP page:
<%
out.print( request.getRemoteAddr() + "<br>");
out.print( request.getRemoteHost() );
%>
Output:
0:0:0:0:0:0:0:1
0:0:0:0:0:0:0:1
views:
843answers:
2
+3
A:
<%
out.print( request.getRemoteAddr() );
out. print( request.getRemoteHost() );
%>
request.getRemoteAddr()return ip address of the machine from where you access the jsp page.request.getRemoteHost()returns the name of host from which you are accessing the jsp page. If you access it from server itself, it will return server name.
If the client is behind a proxy, the above are not useful as you will get the IP of the proxy they are behind, instead try:
<%
out.print( request.getHeader("x-forwarded-for") );
%>
karim79
2009-08-11 18:57:54
+1 for request.getHeader("x-forwarded-for")
Firstthumb
2009-08-11 20:41:24
Does x-forwarded-for always work? Also, I don't think it will help if the client is on the other side of a device that does Network Address Translation.
John Saunders
2009-08-11 20:42:49
Be aware that this is a non RFC standard header ("x-" prefix).
rodrigoap
2009-08-11 20:45:48
@John Saunders - no, it does not always work. It depends on the proxy, the proxy may include the requesting client IP in that non-standard header.
karim79
2009-08-11 20:56:40
<% out.print( request.getRemoteAddr() + "<br>"); out. print( request.getRemoteHost() ); %>Output:0:0:0:0:0:0:0:10:0:0:0:0:0:0:1I really do not know already, how do I determine the IP address of visitor ... :((((
wokena
2009-08-12 04:57:15
+2
A:
Your methods are correct. I assume that you are accessing it on localhost and therefore hitting the loopback interface. The numbers that you are seeing are the IPv6 IP addresses of your loopback interface.
Trying hitting it from another machine.
jsight
2009-09-14 19:20:20