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Is there server hardware available with two ethernet ports, that can turn into a fail-safe bridge when offline?

My use example is a server that does filtering and traffic monitoring on an ethernet bridge interface, but can turn into a straight-through bridge if power is lost.

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closed as not a real question by EEAA, Ward, Ladadadada, Frands Hansen, Sirex Sep 20 '12 at 21:13

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

up vote 3 down vote accepted

Here is a gigabit dual ethernet NIC with the ability to be programmatically assigned to fail-open or fail-closed on power loss. Fail open or closed ethernet

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