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2022-04-05T20:12:16
WebApplication.IP gives you the IP address of the session. But the MAC address can't be obtained (not even on the browser side)
2022-04-05T20:13:00
Code running on the browser (JavaScript doesn't have access to low level stuff like the network MAC address. It would be a security vulnerability)
2022-04-05T20:45:55
Also note that the IP will not be the user's IP if they are going through a router. It will be the router IP. If you want to identify specific machines then consider dropping a unique cookie. You can do that to just identify repeat connections, or you can identify specific machines by providing some option to drop an authorization cookie. Oh, and by \machine\ I mean machine/browser combination. Using a different browser on the same machine will serve up browser specific cookies. So, there are a lot of options but getting bare metal info isn't one of them.