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.
