Re: failover strategies - failing open vs. failing closed.

Linux Advanced Routing and Traffic Control

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Mensaje citado por Kelly Jeglum <Jeglum@xxxxxxxxxxx>:
> I'd like to setup a box with 2 NICs as a firewall which will also rate
> limits outbound traffic.  What happens when/if that box hangs or is
> rebooted?
> 
> I'd like a solution that when there is a failure, traffic can still go
> through the box even though the firewall and rate limiting functions will no
> longer be in effect.  
> 

Maybe it is more than what you need, but did you know Virtual Router Redundancy
Protocol?
http://ftp.ietf.org/rfc/rfc2338.txt

There are several linux implementations.

> I believe that this is "failing closed" but have yet to find an intuitive
> definition - "closed" to traffic going through or (the opposite of an "open"
> circuit) a "closed" circuit which would allow traffic?
> 


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