On Sat, 27 Aug 2022, Clay Daniels wrote:
Date: Sat, 27 Aug 2022 14:17:21 -0500
From: Clay Daniels <clays.sh...@sdf.org>
To: Michael van Elst <mlel...@serpens.de>, current-users@netbsd.org
Subject: Re: ssh, HPN extension and TCP auto-tuning
On 8/27/22 05:37, Michael van Elst wrote:
In https://mail-index.netbsd.org/current-users/2017/09/20/msg032361.html
there was a discussion about effectiveness of the "High Performance
Networking" patch to OpenSSH that we keep in our tree.
Details about the HPN patch can be found at:
https://www.psc.edu/hpn-ssh-home/hpn-ssh-faq/
This led finally to the decision to disable the HPN mode by default
by setting the Option HPNDisabled to yes in /etc/ssh/sshd_config
for netbsd-10.
I have now committed part of the latest version of the HPN changes
that handle TCP window auto-scaling, which avoids the issue we saw
in the past, at least in the network environments I can test.
I'd like to see tests from other people that may help with the decision
to re-enable it, or to abandon the HPN changes.
I regularly use ssh to connect from my netbsd installed on an older machine
here at home to the SDF.org servers on a NetBSD 8.2 machine. Right now I have
yesterdays current head Fri Aug 26 11:03 installed at home. I would love to
help test what I can. Do I need to get a more recent snapshot? I see one on
the server that is 27 Aug 07:34. Would that one work?
Clay
I have loaded the newer netbsd snapshot and ssh'd into my shell on the
user server nameed arpa which runs NetBSD 8.2, opened this letter to reply
to the list, and if you get it ssh works fine here. Nothing fancy. done in
good old pine email. No pictures here yet.
