David Miller wrote:
From: Rick Jones <[EMAIL PROTECTED]>
Date: Tue, 06 Mar 2007 13:25:35 -0800
On the other hand, being able to configure a small MSL for the loopback
device is perfectly safe. Being able to configure a small MSL for other
interfaces may be safe, depending on the rest of the network layout.
A peanut gallery question - I seem to recall prior discussions about how
one cannot assume that a packet destined for a given IP address will
remain detined for that given IP address as it could go through a module
that will rewrite headers etc.
That's right, both netfilter and the packet scheduler actions
can do that, that's why this whole idea about changing the MSL
on loopback by default is wrong and pointless.
If the headers get rewritten and the packet gets directed elsewhere,
then we're no longer talking about a loopback connection, so that's
outside the discussion.
If the packet gets munged by multiple filters but still eventually gets
to the specified destination, OK. But regardless, if both endpoints of
the connection are on the loopback device, then there is nothing wrong
with the idea. Those filters can only do so much, they still have to
preserve the reliable in-order delivery semantics of TCP, otherwise the
system is broken.
It may not have much use, sure, I admitted that much from the outset.
So I'll leave it at this, thanks for the feedback.
--
-- Howard Chu
Chief Architect, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc
Chief Architect, OpenLDAP http://www.openldap.org/project/
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