«

Is it possible in Javascript to determine the numerical
IP-addr that the client is using?

(Normally, I'd do this on the server-side, where it is trivial.)

But, I'm just curious how to do it on the client-side if it's
possible. Of course, in general, the client IP-addr wouldn't
even be relevant if the current page/document came from
a 'file://' URL, but I'm assuming if the current document
came from a (non-local) http:// URL, then maybe both
the server and the CLIENT ip-address could be acquired
somehow.

Can it be done?

In article <f5mdnQU68YDYk4jcRVn->, says...
> Is it possible in Javascript to determine the numerical
> IP-addr that the client is using?
>
> (Normally, I'd do this on the server-side, where it is trivial.)
>
> But, I'm just curious how to do it on the client-side if it's
> possible. Of course, in general, the client IP-addr wouldn't
> even be relevant if the current page/document came from
> a 'file://' URL, but I'm assuming if the current document
> came from a (non-local) http:// URL, then maybe both
> the server and the CLIENT ip-address could be acquired
> somehow.
>
> Can it be done?

Wouldn't you already know the server's IP address? After all, that's
where the page is coming from. As for the client IP, it's relatively
useless when you consider that move users connect through some sort of
proxy (transparent or otherwise) that means the thousands of users have
the same IP address.

http://developer.irt.org/script/1685.htm


--
Hywel

http://sponsorhywel.org.uk/

On Sat, 7 Aug 2004 13:15:48 -0400, David Cook <(who wants to know?)> wrote:

> Is it possible in Javascript to determine the numerical
> IP-addr that the client is using?

[snip]

I don't believe so; I can't think of any way off the top of my head. Check
the group archives with Google. I'm sure this has been covered before.

Mike

--
Michael Winter
Replace ".invalid" with ".uk" to reply by e-mail

David Cook wrote:

> Is it possible in Javascript to determine the numerical
> IP-addr that the client is using?
>
> (Normally, I'd do this on the server-side, where it is trivial.)
>
> But, I'm just curious how to do it on the client-side if it's
> possible. Of course, in general, the client IP-addr wouldn't
> even be relevant if the current page/document came from
> a 'file://' URL, but I'm assuming if the current document
> came from a (non-local) http:// URL, then maybe both
> the server and the CLIENT ip-address could be acquired
> somehow.
>
> Can it be done?

In addition to what others have said, you should understand what
"client" IP-addr you are referring to.

1) are you referring to the private (typically) non-routable IP
address the computer on my LAN has (192.168.0.x)? This can be
obtained in some versions of Netscape, but since it is a private
(typically) non-routable IP address that is also assigned to
possibly thousands of other computers around the world, it's not
very useful.
2) are you referring to the IP address assigned to my gateway by my
ISP? This can not be obtained using any mechanism I know of if I'm
using a proxy.
3) are you referring to the IP address of the proxy which I use to
browse the Web? This can be easily obtained by the server.

--
Grant Wagner <>
comp.lang.javascript FAQ - http://jibbering.com/faq