I've got a slightly unusual request. Does anybody know how to find the private IP address of a machine that's connected to a given website? Basically, I've got an employee playing games (wasting other people's time) with a form on our website and need to track down who it is. I believe the form is PHP-based; we had another company create it - they have no clue how to accomplish this. However since all the machines on our network go through the same gateway, the public IP address is the same for all of them. I need the private IP address (or anything else unique) of the machine submitting the form.
I do remember seeing a security audit site a while back that displayed the private IP address of the PC with a message that it shouldn't be visible or something like that. I can't for the life of me find it though.
Finding Private IP Address?
Finding Private IP Address?
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zoneminder
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Does your gateway have a proxy on it that you can track a log from?
I don't think there is anything you can get from php, though perhaps you might be able to do more with JavaScript. Failing that you could just try sending a cookie and then going round all the machines looking to see on which machine it lives.
Phil
I don't think there is anything you can get from php, though perhaps you might be able to do more with JavaScript. Failing that you could just try sending a cookie and then going round all the machines looking to see on which machine it lives.
Phil
I have no idea what the configuration of the gateway is - they don't let me into that. 
I'd thought of what you suggest with a cookie, but that'd be a royal PITA to check every single machine every time it happens. I wish I could remember which site it was that I saw my private IP address on... it's driving me up the wall because it's *exactly* what I need!
I'd thought of what you suggest with a cookie, but that'd be a royal PITA to check every single machine every time it happens. I wish I could remember which site it was that I saw my private IP address on... it's driving me up the wall because it's *exactly* what I need!
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Hi.
For example, check this site: http://www.auditmypc.com/freescan/scanoptions.asp . Below the scan options, there is a detected private address - at least it worked for me, even that I'm behind NAT.
This is an interesting topic, btw. It seems as they are using Java applet for this functionality, so if someone could discover the method, I think we would be able to reproduce it.
BTW2: it doesn't seems to work with tabs in Firefox, so try to copy/paste the link to IE, or use only once instance of Firefox.
For example, check this site: http://www.auditmypc.com/freescan/scanoptions.asp . Below the scan options, there is a detected private address - at least it worked for me, even that I'm behind NAT.
This is an interesting topic, btw. It seems as they are using Java applet for this functionality, so if someone could discover the method, I think we would be able to reproduce it.
BTW2: it doesn't seems to work with tabs in Firefox, so try to copy/paste the link to IE, or use only once instance of Firefox.