[pfSense Support] Strange TCP connection behavior 2.0 RC2 (+3)

Cameron Byrne cb.list6 at gmail.com
Wed Jun 29 20:53:44 UTC 2011

On Wed, Jun 29, 2011 at 1:48 PM, Mikael Abrahamsson <swmike at swm.pp.se> wrote:
> On Wed, 29 Jun 2011, Cameron Byrne wrote:
>> Sounds like a vendor specific issue :(
> Absolutely, but this is way too typical for these kinds of networks.
>> Good tcp vs default tcp will not close the window tight due to some
>> ephemeral loss or delay.  The penalties are generally too strong in tcp
>> for
>> the issues of delay and loss in 3g ... this is one of the main selling
>> points for tcp proxies .... but better done with modern tcp on the clients
>> instead of a middle box
> For what kind of devices? I can get full speed (870 kilobyte/s) on 7.2 HSPA
> with single TCP stream on a linux box. Are you referring to handsets that
> get improvement on high latency links?

Yes.  Smartphones on UMTS/HSPA have poor bandwidth-delay product,
hence it being common for mobile providers to proxy the TCP to open
windows faster.

> --
> Mikael Abrahamsson    email: swmike at swm.pp.se

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