Returning the users IP address

[rita mistry]

Hi All,
I was just wondering is there a method in JSP which will retrieve the user's IP address. Not the server's IP address but the IP address of the machine they are using.
Any help will be very much appreciated.
Many thanks
Rita.

[Roy Ben Ami]

you need to use javascript for that or other client side scripting language.
here is one example:
javascript ip user address

[Shawn Bayern]

Originally posted by Roy Ben Ami:
you need to use javascript for that or other client side scripting language.
here is one example:
javascript ip user address

That's not quite true; a server has access to the IP address of the client that has connected to it. In the Java Servlet API, this information is represented to an application via the ServletRequest object. Thus, in a JSP page, you can call
request.getRemoteAddr()
to retrieve the IP address. In JSTL, you can avoid a scriptlet:
<c ut value="${pageContext.request.remoteAddr}"/>
Hope that helps.

[Roy Ben Ami]

i stand corrected

[Carl Trusiak]

You also need to remember that if the client is behind a firewall or proxy server, this IP address will most probably be that and not the clients machines address.

[Tim Holloway]

Also, NAT cam make every user on the network appear to be the same IP.
As if that wasn't enough, it's not that difficult to spoof IPs. If you were planning to use IPs for authentication - or even fine-grained request tracking - it's pretty hopeless.