Mac Address

Hello,
I want to block certain mac address to access my MS-SQL server. for that what can i do. for example
I want to block the mac address [abc]. how is it possible to block the mac address [abc]Use a firewall. You can't do it from MS SQL Server|||Or from a router on the network, a sample:
To determine the corresponding IP address for this MAC address, run the following DOS networking command in a DOS window:
arp -aThis displays the IP address of all connected machines.
Match up the net_address value from the sysprocesses query (step 1) with the corresponding Physical Address in the arp -a results (step 2) to determine the IP address corresponding to the Physical Address is the IP address of the machine running the blocking process. To find the corresponding hostname of this machine, run the following DOS networking command in a DOS window:
ping -a <IPaddress>In the command above, <IPaddress> indicates the IP address identified with the arp -a command.