Get IP address of client in JSP

Question

I need to get the IP address of the client in the JSP page. I have tried the following ways:

request.getRemoteAddr()
request.getHeader("X_FORWARDED_FOR")
request.getHeader("HTTP_CLIENT_IP")
request.getHeader("WL-Proxy-Client-IP")
request.getHeader("Proxy-Client-IP")
request.getHeader("REMOTE_ADDR")

However, none of those ways did return the desired IP address. How do I get the IP address of the client in the JSP page?

Also see [this](http://stackoverflow.com/q/1423347/473637) question. — Jeshurun, Jul 27 '12 at 07:32
request.getRemoteAddr() returns 0:0:0:0:0:0:0:1 which is not the true value of IP of client. — Satish Sharma, Jul 27 '12 at 07:46
try request.getRemoteHost() method, if the client not use a gateway ip of client return by this method. else this method returns the ip of gateway. — janith1024, May 02 '13 at 10:35

score 13 · Answer 1 · answered Mar 19 '14 at 10:32

To get IP address of the client, I've used the following method

<%   String ip = request.getHeader("X-Forwarded-For");  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("Proxy-Client-IP");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("WL-Proxy-Client-IP");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("HTTP_CLIENT_IP");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");  
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getRemoteAddr();  
        }
        %>

Hope this helps, please leave a feed back.

score 8 · Answer 2 · answered Jul 27 '12 at 07:41

8

<%
out.print( request.getRemoteAddr() );
out.print( request.getRemoteHost() );
%>

You may not get the real client IP if a the client is behind a proxy, you will get the IP of the proxy and not the client. However, the proxy may include the requesting client IP in a special HTTP header.

<%
out.print( request.getHeader("x-forwarded-for") );
%>

answered Jul 27 '12 at 07:41

kinaesthesia

703
6
27

But how to get The IP of client when no proxy is configured between client and requested server. – Satish Sharma Jul 27 '12 at 07:45
[link](http://stackoverflow.com/questions/1423347/problem-with-jsp-getremoteaddress) See this post. – kinaesthesia Jul 27 '12 at 07:47
output comes like 0:0:0:0:0:0:0:1 you have any idea why?? – Harshil Kulkarni Apr 05 '16 at 05:48

score 3 · Answer 3 · answered Jul 27 '12 at 07:49

3

Is your application server behind a load balancer, a proxy or a web server? Just an example; F5 load balancer exposes the client IP address with the "rlnclientipaddr" header:

request.getHeader("rlnclientipaddr");

answered Jul 27 '12 at 07:49

orique

1,295
1
27
36

score 0 · Answer 4 · answered Jul 27 '12 at 07:36

0

do you use reverse proxy like apache proxy? http://httpd.apache.org/docs/2.2/mod/mod_proxy.html

When acting in a reverse-proxy mode (using the ProxyPass directive, for example), mod_proxy_http adds several request headers in order to pass information to the origin server. These headers are:

X-Forwarded-For
The IP address of the client.
X-Forwarded-Host
The original host requested by the client in the Host HTTP request header.
X-Forwarded-Server
The hostname of the proxy server.

answered Jul 27 '12 at 07:36

Andrey Borisov

3,160
18
18

No Proxy is used between server and client . All Values getting using X-Forwarded-For , X-Forwarded-Host , X-Forwarded-Server are giving null cause of proxy is not used. – Satish Sharma Jul 27 '12 at 07:38
if you are not using any of reverse proxy, just check use http servlet API - httpServletRequest.getRemoteHost() and getRemotePOrt() http://docs.oracle.com/javaee/6/api/javax/servlet/ServletRequest.html – Andrey Borisov Jul 27 '12 at 07:39
Nothing is present in httpServletRequest that will provide me the IP of Client. I Have Checked The Whole API. – Satish Sharma Jul 27 '12 at 07:47

Get IP address of client in JSP

4 Answers4

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