On Saturday, 13 February 2016 05:15:29 UTC-5, Ruby-Forum.com User wrote:
>
> I am using a Rails 4 application, when in production mode i am getting 
> same IP address for all the members of the same organisation. The 
> requirement is to get different IP address for each member so as to 
> uniquely identify each system. 
>
> request.remote_ip 
> request.env['HTTP_X_REAL_IP'] 
> request.env["HTTP_X_FORWARDED_FOR"] 
>
> All these fetches me the same IP for each system. How can i uniquely 
> identify each system? Please help. 
>
>
`remote_ip` is calculated from the other two (and a few additional 
headers). The calculation may sometimes misunderstand the network topology, 
so if you're getting an IP that's part of your infrastructure (load 
balancers / proxies / etc) for every client it may be worth looking into.

Otherwise, your options are very limited. One of the *purposes* of 
organization-level NAT is to avoid leaking internal addresses / machine 
identities to the outside (for security). I've read of a way to use the 
Javascript WebRTC API to get the client's LAN address, but I wouldn't 
recommend depending on that for anything like licensing or authorization 
since any data coming from JS is trivially spoofable.

I'd recommend that you push back on whoever / whatever is imposing this 
requirement to figure out what the intent is. You may need to find an 
alternative way to achieve that goal.

--Matt Jones

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