[vox-tech] scp bandwidth limit

[Chanoch (Ken) Bloom]

On Wed, 2010-12-01 at 16:03 -0800, Bill Kendrick wrote:
> My DSL is assymetric.  Uploads slow down everything else (most
> notably, my SSH sessions).
> 
> This is particularly noticable now that I have a WiFi router that does
> more than just 802.11b.  (In other words, it's a lot easier for my
> laptop to saturate my DSL bandwitdh now ;) )
> 
> 
> I find that things work nice if I limit the upload speed using
> "scp -l 240" (30KB/s, since it seems to max out at about 50-60KB/s).
> However, I'd like to do this only when uploading, not downloading.
> So setting up an alias (e.g., "alias scp scp -l" in my ~/.bashrc)
> isn't the best solution.
> 
> Is there a config somewhere that I can use to limit 'local -> remote'
> transfers (uploads), while not limiting 'remote -> local' transfers
> (downloads)?  I don't see _anything_ related to bandwidth limiting
> in "man ssh_config" (which kinda makes sense, since the "-l" option
> is specific to scp).
> 
> Is there some scp config file that I'm not discovering? :)

Perhaps you'd like to look at traffic shaping at the kernel level
instead. See http://www.tldp.org/HOWTO/ADSL-Bandwidth-Management-HOWTO/

(You should be able to just install apt-get install wondershaper, read
the readme, tell it your upload and download speed, and get good
results.)