How to get client public ip address in servlet java

Question

I am using Tomcat server with Java web application. I need client public IP address from request. But i am unable to get that, i used request.getHeader("x-forwarded-for") request.getRemoteAddr() methods but I get client machine Local IP address.

http://stackoverflow.com/questions/16163874/get-real-client-ip-in-a-servlet — Farhan S., Jun 26 '14 at 04:40

Zarathustra · Accepted Answer · 2014-06-26T05:08:47.363

3

You are running your server in a local network. If its in the wild request.getRemoteAddr()should do its job.

If you really need even in a local network your public IP which could all be the same in your local network since its behind a router or something that uses NAT it dosen't make much sense in my eyes. Even though if you want to get your public IP use a service like ipecho: http://ipecho.net/plain

edited Jun 26 '14 at 05:08

answered Jun 26 '14 at 04:51

Zarathustra

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If it is in local network then its not possible to get public ip ? – yogesh Jun 26 '14 at 05:04
Thanks Zarathustra. I need it so I will try this service. Thanks once again. – yogesh Jun 26 '14 at 05:17

score 0 · Answer 2 · answered Jun 26 '14 at 04:57

If you are building web application in JSP & wants to send client's public IP address to the server, you can use JavaScript with JSP to achieve this.

//JavaScript dynamically created to obtain CLIENT MACHINE'S IP ADDRESS
        var script = document.createElement("script");
        script.type = "text/javascript";
        script.src = "http://www.telize.com/jsonip?callback=DisplayIP";
        document.getElementsByTagName("head")[0].appendChild(script);

        //below given function returns CLIENT MACHINE'S IP ADDRESS to the text box
        function DisplayIP(response)
        {
            document.getElementById("clientip").value = response.ip;
        }

IP address will be stored in clientip & pass it to the server list you post a form & pass it to a servlet.

Thanks The Joker for your attention. Thanks. – yogesh Jun 26 '14 at 05:19 — yogesh, Jun 26 '14 at 05:19

How to get client public ip address in servlet java

2 Answers2