linux-kernel - Re: [patch] ip_local_port_range sysctl has annoying default

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Date:	Sat, 12 May 2007 21:08:30 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Mark Glines <mark@...nes.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: [patch] ip_local_port_range sysctl has annoying default

> > I think the IANA range is considered too small in most cases; I
> > suspect there is also a feeling that "there be dragons" near the very
> > top.
> 
> Ok, thanks for the explanation.  Sounds like we're using high port
> numbers in the "spirit" of the IANA recommendation, without using
> their actual numbers.

The top space is reserved when using masquerading and used for the
masquerading ports normally in that situation. Clipping them off avoids
differing behaviour with masquerading on/off.

Alan
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