I am comming back again :)
Still on my lovely Linux box, I want to only specifical MAC address (Ethernet address) can access our internet service, All others can't. How can I?
And BTW, all intranet PC is use DHCP server in our Group, and I can't change this configuration. So IP/MAC correspond is unusefull here. And I do not want to change the linux kernel, Is here any tools just like "arp" Can perform this.