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Метка: mac

Linux bridge: MAC addresses and dynamic ports

Linux bridge: MAC addresses and dynamic ports

Scenario: KVM virtualization host running several bridged guests. The host has a bridge interface br0 that starts out containing only eth0, and other interfaces are dynamically added and removed from the bridge as guests are started and stopped. The problem is, the host seems to randomly suffer some loss of connectivity (from a few to 30-40 seconds) when some guest is started or stopped. Initially one might think of something related to STP, but it turns out that it is…

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Привязать MAC к IP на шлюзе

Привязать MAC к IP на шлюзе

Чтобы отсеять незнакомцев которым не дозволен выход в инет либо гуляние по корпоративным подсетям, можно применить фильтр мак-адресов + ip-адресов В случае если шлюзом выступает сервер на Linux, с iptables на борту, выглядит это так: