The Linux Blog » filter http://linuxblog.ro UNIX, LINUX, BSD, OSX Thu, 19 Aug 2010 14:32:39 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 IPTables: Filtering by MAC Address http://linuxblog.ro/iptables-filtering-by-mac-address/ http://linuxblog.ro/iptables-filtering-by-mac-address/#comments Wed, 01 Apr 2009 14:15:25 +0000 admin http://linuxblog.ro/?p=373 If we want filter a MAC in our firewall, we can use IPTables to this. For example, if we want to filter a MAC like 00:12:8D:EE:6E:AB (Must type the MAC with this format -> HH:HH:HH:HH:HH:HH) and deny their access to our Firewall we can put type this:

iptables -A INPUT -m -mac --mac-source 00:12:8D:EE:6E:AB -j DROP

Also, we can use the ! operator, wich inverts the operation, for example, if we type:

iptables -A INPUT -m -mac --mac-source ! 00:12:8D:EE:6E:AB -j DROP

All the packets will be dropped, except the packets from 00:12:8D:EE:6E:AB MAC.

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