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I am using GWT on the client side to connect to an application server and would like to know if there is any unique hardware identifier accessible (through GWT or a servlet), such that I could allow certain machines to access my content, and reject other machines.
You won’t be able to get any hardware info (like MAC address) from your client with GWT.
Using
getThreadLocalRequest().getRemoteAddr();you’ll be able to get the IP address if you know them and they don’t change it may be a solution