Bluecoat's PacketShaper is really good - not use it for a long time (since Packetshaper got bought) but the effects are just stunning.
https://www.bluecoat.com/products-and-solutions/wan-optimization-packetshaper worth a look /pricing -- Martin Hepworth, CISSP Oxford, UK On 7 July 2016 at 08:49, Brian Candler <[email protected]> wrote: > On 06/07/2016 22:20, Iain Grant wrote: > >> Modifying the window size is not new, shorewall can do it - anything that >> can use the ifb driver in linux can! >> >> Can you point me to some documentation to back up that assertion? > > As I understand it, etinc and packeteer work by modulating the TCP receive > window size. I can't find anything about ifb that says it can work that way. > > It says it does "policing" (i.e. dropping packets out of profile) and > "shaping" (i.e. delaying packets in a queue). > You can have "active queue management" using the FQ_CODEL algorithm, which > stops your queues getting too full so that latency is reasonable, but as > far as I can see it still basically just drops packets, or marks them with > ECN flags, as a way of signalling the TCP sender to slow down. > >
