Re: slow sFTP with SSHD

FWIW, I'm not running SSH through port 22 but do run it through a router
and the local Zonealarm firewall using WinSCP. FTP runs a lot faster
(over port 21) than SFTP through WinSCP. I believe the speed does slow
down due to all the overhead of encryption/decryption. 150kbps seems
similar to my results as I was also disappointed with the rate...

Alan

LQ Marshall wrote:

> Another possibility you did mention is the possibility your connection
> is being throttled somewhere. SFTP runs on TCP/22 where FTP is
> TCP/20,21. Network admins may have placed a throttle on TCP/22 since
> it is typically used for "encrypted telnet". Just a guess... Running
> your benchmark from the same host may not properly replicate the
> problem. If possible run your test from a local physical switch
> (somehow w/o possibility of filtering/control/proxy). Would give you
> a more accurate view, unless you know things about the network not
> mentioned. Q
>
> ----- Original Message -----
> From: Nicholas Tripcevich
> To: ssh@erdelynet.com
> Sent: Thursday, January 20, 2005 5:48 PM
> Subject: slow sFTP with SSHD
>
>
> SSH users---
>
> I’ve set up SSHD and Cygwin on a Win2000 pro machine
> following the helpful directions on Erdelynet.com.
>
> I need to connect to the serving machine from another
> machine at my university campus. We have very high bandwidth
> inside campus connections, and I usually get 3-4 M/sec
> transfer speeds. I was formerly using the not secure Windows
> IIS ftp server and I can achieve these transfer speeds with
> the current system and IIS.
>
> However, with the Cygwin SSHD setup I just installed I’m not
> able to get more than 150k/sec transfer speeds using sFTP
> and SSH2. I tried to use SSH1 and it didn’t connect (I’d
> rather have the security of SSH2).
>
> I tried using both SSH Secure Shell client and CoreFTP and
> both are very slow.
>
> I tested the setup in a couple of ways. First, I’m able to
> download at speeds using IIS ftp from another machine on
> campus, so it’s not the network card or my server hardware
> (a 500mhz P3 dell optiplex gx110). Second, I’m able to
> download at high speeds on the LocalHost using SSH Secure
> Shell client on the same server machine (just to test to see
> if the Cygwin config is the bottleneck).
>
> So the problem seems to lie somewhere with either Cygwin
> SSHD, the network card.
>
> I’m surprised I’m the only one who has run into this, but I
> searched the mail list archives to no avail.
>
> Thanks very much---
>
> Nico Tripcevich
>
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