I have read many posts on ssh connection refused, but I have this and other ssh issues. Here is my research:
1) occurs on many of my machines, all running Raspian and latest version of sshd
2) when ssh drops out, I immediately get "connection refused" when I try to reconnect
3) nmap shows port 22 is closed when I can no longer connect
4) system gets a dynamic ip address, so presumably no ip address conflicts
5) seems to occur with headless machines, so I can't run any tests on them
6) machine is active, and http access to them remains working
7) machines send me periodic status reports via my script in /etc/cron.hourly. I see that sshd remains running even when I can't connect, and it is listed like this:
root 3487 1 0 Sep06 ? 00:00:31 sshd: root@pts/0
8) an ssh connection stays up if I keep constant traffic, such as from top, but sometimes the connection dies as soon as I close top and return to the command line
9) ssh can stay up for weeks, or sometimes just hours
How can I fix this ???
Thank you in advance for your help.
