Monday, February 15, 2016
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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