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Re: Strange ssh hangups, netbsd-9 GENERIC




On 3/12/21 2:59 AM, Dustin Marquess wrote:
On Thu, Mar 11, 2021 at 11:54 AM Louis Guillaume <louis%zabrico.com@localhost> wrote:

I have a netbsd-9 machine that is exhibiting some weird behavior with ssh:

NetBSD <> 9.0_STABLE NetBSD 9.0_STABLE (GENERIC) #0: Sun Jul 26 11:09:19
UTC 2020
mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64


When a bunch of data are sent to the terminal at once the session quits
unexpectedly. I can't run a "dmesg" or even read a man page without it
hanging up.

I'm only seeing this on a GENERIC machine. ssh client doesn't seem to
matter: xterm, Apple Terminal, puTTY on Windows all have the same
behavior. It seems the only significant debug statement I see is
"debug3: fd 1 is not O_NONBLOCK".

[SNIP]

Does it drop right away, or hang for a while and then drop?

If it hangs when doing a lot of output, I've usually seen that with
MTU issues.  If it just drops right away, then I haven't seen that :(.

-Dustin


It's immediate! There's no lag at all - maybe a fraction of a second. But thinking of MTU makes me wonder if it's not the switch somehow... Thanks for looking,

--
Louis


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