Date: Sat, 16 Apr 2005 00:15:26 +0100 From: RW <list-freebsd-2004@morbius.sent.com> To: freebsd-questions@freebsd.org Subject: Re: Traffic Shapping (IPFW + DUMMYNET) Question Message-ID: <200504160015.27096.list-freebsd-2004@morbius.sent.com> In-Reply-To: <20050414135309.B01C543D3F@mx1.FreeBSD.org> References: <20050414135309.B01C543D3F@mx1.FreeBSD.org>
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On Thursday 14 April 2005 14:53, Timothy Radigan wrote: > Hi all, > > I'm new to the entire idea of traffic shaping and I came up with some rules > for my BSD firewall/router/VoIP gateway > >... > > Does this seem like it will perform as I am thinking it will? I've not tried this kind of thing myself, but I wouldn't be very optimistic about what you are trying to do. AFAIK dummynet works through IP packet queueing. That means that it can do a good job of shaping outgoing traffic, but the only control it has on incoming traffic is through dropping packets that have already been received, which isn't very efficient. To achieve what you want would really need some something that can hook into the tcp/ip stack and affect tcp window sizes. I dont know of anything that would do that.
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