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Date:	Mon, 28 Jun 2010 21:03:13 +0200
From:	Joakim Tjernlund <>
To:	Stephen Hemminger <>
Cc:	David Miller <>,
Subject: Re: [PATCH net-next-2.6] ipv4: sysctl to block responding on down interface

Stephen Hemminger <> wrote on 2010/06/11 17:48:54:
> When Linux is used as a router, it is undesirable for the kernel to process
> incoming packets when the address assigned to the interface is down.
> The initial problem report was for a management application that used ICMP
> to check link availability.
> The default is disabled to maintain compatibility with previous behavior.
> This is not recommended for server systems because it makes fail over more
> difficult, and does not account for configurations where multiple interfaces
> have the same IP address.
> Signed-off-by: Stephen Hemminger <>

Ping David et. all?
I too want this.


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