Is there any possible ways to get the MAC address?

Hi guys:
I am writing servlets on the server side. Is there any possible ways to get the MAC address when a HTTP request come in? Thank you very much for any helps.
all the best!

It is usually impossible to get the MAC address of the maker of a HTTP request in any programming language or system.
At best, you can get the MAC of the closest intervening router, firewall, whatever.
Are you sure you mean the MAC address? MAC looks like this: 8:ab:f0:0:71:bb:90 (Ethernet), or 01-23-45-67-89-ab (Token Ring), etc, depending on your network type.
In contrast, an IP address looks like this: 209.249.116.195. If you want the IP address, check out the javadoc for HttpServletRequest and ServletRequest. Caveat: load balancers, web caches, proxy servers, etc will mask the "true" peer's address. Don't do anything silly like try to use the IP address for security or authentication.

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