Apache Cookbook: Solutions and Examples for Apache Administrators
Problem
You want to record the MAC (hardware) address of clients that access your server. Solution
This cannot be logged reliably in most network situations and not by Apache at all. Discussion
The MAC address is not meaningful except on local area networks (LANs) and is not available in wide-area network transactions. When a network packet goes through a router, such as when leaving a LAN, the router will typically rewrite the MAC address field with the router's hardware address. See Also
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