You might expect some difference in TCP buffer tuning if
Bandwidth*RTTDelay is much higher than on LAN.

Janos Mohacsi
Network Engineer, Research Associate, Head of Network Planning and Projects
Key 70EF9882: DEC2 C685 1ED4 C95A 145F 4300 6F64 7B00 70EF 9882

On Wed, 14 Nov 2007, Hari Sekhon wrote:

> I quickly installed this on two systems when I found it, and then scp-ed some
> stuff across both systems but didn't notice any performance increase for the
> transfer rates/times on my local gigabit lan, in fact it was slower. Perhaps
> the benefits are more over slow wan connections...
> -h
> Hari Sekhon
> Mathew Brown wrote:
>> Hi,
>> I just came across the High Performance SSH/SCP - (HPN-SSH) -
>> http://www.psc.edu/networking/projects/hpn-ssh/ - and was wondering if
>> the HPN patches had been ported to mailine OpenSSH. If not, what
>> suggestions are available for improving the speed of SFTP in local LAN
>> environments? Thanks for your help.