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From: Nate Williams <nate@yogotech.com>
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To: Matt Dillon <dillon@earth.backplane.com>
Cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>,
	Jonathan Lemon <jlemon@FreeBSD.org>, cvs-committers@FreeBSD.org,
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Subject: Re: cvs commit: src/sys/netinet ip_input.c
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> :> }   When iterating over our list of interface addresses in order to determine
> :> }   if an arriving packet belongs to us, also check that the packet arrived
> :> }   through the correct interface.  Skip this check if the packet was locally
> :> }   generated.
> :
> :This change is bogus and breaks multihomed hosts.  Please back it
> :out.  While RFC 1122 states (3.3.4.2):
> 
>     I'm not sure I understand how the commit changes anything.  If
>     a packet arrives on an interface with a destination address that does
>     not match the interface's address or aliases, and we aren't in
>     promiscuous mode, won't the controller reject the packet anyway?

Not if the host is a multi-homed gateway.


Nate

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