SFTP slow

[Doug Brott]

Alessandro De Maria wrote:

> Basically, I'm experiencing a problem while moving files with sftp (via 
> the gnome-vfs module). 
> Everything is REEEALLY slow, which makes the coolest way to quickly move 
> files from my 2 computers stressfully unusable :-( 
>  
> actually it's really slow also using ssh itself :-( 
>  
>
On Thu, 2004-05-27 at 17:53 +0100, James Wilkinson wrote:

> How slow is "REEEALLY slow"? What sort of speed are you getting in MB/s? 
>
> How fast are these computers? 
>  
>

Alessandro De Maria wrote:

> Really slow means 5-6 minutes to move an 4 MB file from one computer 
> to the other...
> I used t o do it before and it used to take few seconds...
> Computer are two Athlon XP 1600+/XP 2000

I'm not sure that this solution is actually right for your case, but it 
sounds similiar to a problem that I was having regarding network 
performance to the Internet from my machine.  The following information 
was posted already, but it might be helpful for you here as well.

If you are experiencing SLOW network access, it could be due to the fact 
that you are running IPv6.
An easy way to disable this is to modify /etc/modprobe.conf to include 
the following line:

alias net-pf-10 off

You will need to reboot, but it solved the problem for me.  I have 
Comcast cable Internet, and prior to upgrade to FC2, I was seeing > 
3Mb/s download rates.  After the upgrade to FC2, I was seeing around 
1.2Mb/s download rates.  Obviously, this was unacceptable.

Turns out IPv6 was enabled in my configuration and the added line to the 
modprobe.conf file fixed my network speed issues.  By disabling IPv6, I 
was able to get back to what I expected to be the true bandwidth.

Hopefully this note will help othere who may experience the same problems.

Regards.

-- 
Doug Brott
brott at redh.com