netdev - Re: [RFC net-next 0/4] Support UID range routing.

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Date:	Wed, 30 Apr 2014 17:22:51 +0930
From:	David Newall <davidn@...idnewall.com>
To:	Lorenzo Colitti <lorenzo@...gle.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	David Miller <davem@...emloft.net>, JP Abgrall <jpa@...gle.com>
Subject: Re: [RFC net-next 0/4] Support UID range routing.

On 30/04/14 14:06, Lorenzo Colitti wrote:
> The use of NAT [...] makes it impossible for the app to know its
> real IP address and port

The original address *is* the real address.  NAT breaks IP's design and 
is a very mixed blessing.  NAT isn't needed nor used with IPv6, and 
being in IPv4's twilight years, an argument predicated on NAT is not 
very convincing.

I feel that describing the patch as routing is misleading, as it 
performs only outbound link selection.  It fosters an expectation of 
bi-directionality, and that is not the case.  It will often result in 
asymmetric routes.

Is it possible you are trying to solve a problem which has already been 
solved, for example by IGP?
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