Tunneling lock/hangs/unidirectional

Darren Tucker dtucker at zip.com.au
Wed Jan 25 11:55:56 EST 2006

On Tue, Jan 24, 2006 at 12:52:05PM -0500, Corey Smith wrote:
> I've setup a lab to test the new tunneling options in the latest
> openssh.  Things work well...  for a while... then the tunnel goes
> unidirectional.
> PING ( 56 data bytes
> ping: sendto: No buffer space available

It looks like the buffer space in your tunnel device is full.  Is the
SSH stream still running?  If you stop transmitting traffic does it come
good again?  Are other normal connections to that machine affected?

You might also like to try picking a fast cipher (arcfour is usually
fastest of the standard ones) and see if that makes a difference.

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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