Secure Shell
Question about SCP stalling over VPN Mar 09 2010 05:44PM
Matthew Case (mattcase specializedbusinesssoftware com)

I am attempting to SSH a series of relatively small files (tens of
megabytes) over a VPN connection to a remote linux server. I am able to
SSH between the servers without a problem, but when I use SCP to copy
the files I start seeing the following message more and more until
finally the copy grinds to a halt and eventually times out:

debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 131072
debug2: channel 0: rcvd adjust 131072

I've looked high and low and haven't really come up with anything
definitive. Someone somewhere had mentioned fiddling with MTU settings,
but I'm not really sure what that will accomplish as I am unfamiliar
with what MTU is and does. If this question has been answered
previously, I apologize ahead of time. Thanks!

I am running CentOS 5.3 with OpenSSH 4.3p2-29 on the server I am copying
the files from, and CentOS 5.4 with OpenSSH 4.3p2.36 on the server I am
copying to.

Matthew Case
Specialized Business Software
Software Engineer
SCJP 5 Certified
Phone: 440-542-9145
Fax: 440-542-9143

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