Packet Shaping

Matthew Seaman m.seaman at
Sun May 18 02:29:55 PDT 2003

On Sat, May 17, 2003 at 08:57:22PM -0400, Mark Lapointe wrote:
> Hi there,
> I would like to share my DSL connection w/ my housemates, but since I am 
> footing most of the bill, and they are starting to become more heavy 
> users I would like to limit them to like 100k down to 25k up on their 
> part of the subnet (from to 199) then segment my end to be 
> able to use unlimited if I want to, possibly limit myself to 300K when 
> the others are active.
> I could always create another subnet for myself also (ph33r the 
> housemates... let the virri that they catch, they can keep to themselves).

That's not excruciatingly difficult to achieve.  You need a
combination of ipfw(8) and dummynet(4).  Luigi Rizzo (author of
dummynet) has a page with lots of useful information at



Dr Matthew J Seaman MA, D.Phil.                       26 The Paddocks
                                                      Savill Way
PGP:         Marlow
Tel: +44 1628 476614                                  Bucks., SL7 1TH UK
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