Extremely slow SFTP, but fast SSH?

[NoOp]

On 05/13/2010 12:50 PM, Robert Spanjaard wrote:
> When logging in to my desktop with SFTP, the connection is limited to 
> around 1 (yes, one) kilobyte per second. It can take over a minute to 
> respond to "ls" in my home folder.
> It seems to be a routing problem. When I'm at the desktop, logging in to 
> 127.0.0.1 or the local IP-address (192.0.x.x) results in a fast 
> connection. But when I log in to my external IP address (84.106.195.207 
> at the moment), the connection is as slow as mentioned above.
> The strange thing is, that when I log in using ssh or ssh -X, the 
> connection does work at full speed. So that implies that there's nothing 
> wrong with the routing after all. Unless there's a difference between the 
> two that I'm not aware of.
> 
> Can anyone help me out?
> 
> 
> 

Seems to be common:
https://launchpad.net/+search?field.text=SFTP+%2Bslow
 https://bugs.launchpad.net/ubuntu/+source/glib2.0/+bug/250517