Re: Strange SCP problem

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Date: Tue, 23 Mar 2004 14:21:45 +1100
To: Adam Shostack <adam@homeport.org>

Adam Shostack wrote:

> On Tue, Mar 23, 2004 at 01:51:01PM +1100, Darren Tucker wrote:
> | Adam Shostack wrote:
> | >I'm having a problem where I can copy files from a server to my
> | >laptop, but not the other way. It's not the scp failure listed in FAQ
> | >2.9, that test works fine.
> | >
> | >When I attempt to do a copy, I see the "progress bar" go, the file is
> | >created on the other side, and I get an eventual time-out.
> |
> | Maybe this?
> | http://www.snailbook.com/faq/mtu-mismatch.auto.html
>
> Bing! Give the man a gold star!
>
> Any advice on path mtu discovery tools that let me set something
> bigger than 576?

Depends on what the network between client and server looks like, what
packet types your firewall allows, the TCP stack parameters, the phase
of the moon, prevailing winds....

You can try experimenting with ping and different packet sizes, but
again that depends on what your network allows.

Trial-and-error is probably your best bet. Keep cranking it up until it
fails then drop it down to just below that. If your hosts support it,
you can try relying on TCP Path MTU Discovery (but if that worked in
your environment you should have never had a problem).

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
     Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.

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