Date: Wed, 21 Jun 2023 10:24:14 -0700 From: bob prohaska <fbsd@www.zefox.net> To: freebsd-net@freebsd.org, freebsd-arm@freebsd.org Subject: -current dropping ssh connections Message-ID: <ZJMyPquk32fXhT%2BI@www.zefox.net>
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I've got a Pi4 running -current that seems to selectively drop ssh connections. Connections running a shell seem to stay up, but a session running tip to a usb-serial adapter (FTDI TTL232R-3V3) seems go away within a few hours. There don't seem to be any error messages on the console at all, the client session simply reports client_loop: send disconnect: Broken pipe Searches through /var/log/sshd_debug.log find many transactions between the ssh client and the -current target host, but none seem to be error messages; all are either connection reports or disconnects by user. This sort of behavior has been intermittent with aarch64 among both the Pi4 and a pair of Pi3s for some time, but now only the Pi4 is dropping connections. I've tried searching /var/log/sshd_debug.log for the keywords tip, ucom, the IP address of the NAT client used to connect and cuaU0. Are there other things worth looking for? Right now I'm using in /etc/rc.conf the line sshd_flags="-E /var/log/sshd_debug.log" which is already quite verbose. Is there a better option that emphasizes errors over normal traffic? Thanks for reading, bob prohaska
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