I use the jetson nano as a remote machine installed in a rolling robot. I communicate with the robot via a tunnel ssh over the wifi network. Everything works well. When the robot enters in a no-wifi zone for a short time, it’s also OK : the communication stops during this time and resume correctly. But the robot enters in a no-wifi zone for a time > 18minutes, the the ssh-server closes the ssh tunnel ! I dont understand why because I ve parametrize the sshd_config file to create a permanent ssh tunnel (see below).
For information I use the INTEL Wifi AC8265 board, but except for this issue, this board works very well.
The disconnection problem is easy to replicate on Nano:
- connect a terminal (like putty) from an HOST to the nano board
- On nano board, type the command “w” listing the connected and you can see the HOST connected
- On nano, disconnect the wifi for a while (> 18min) and then reconnect the wifi
- On nano board, type the command “w” and you can see that the HOST connection has been removes by ssh-server.
Here is the complete sshd_config file:
OpenBSD: sshd_config,v 1.101 2017/03/14 07:19:07 djm Exp
This is the sshd server system-wide configuration file. See
sshd_config(5) for more information.
This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
The strategy used for options in the default sshd_config shipped with
OpenSSH is to specify options with their default value where
possible, but leave them commented. Uncommented options override the
Ciphers and keying
#RekeyLimit default none
Expect .ssh/authorized_keys2 to be disregarded by default in future.
#AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2
For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
Change to yes if you don’t trust ~/.ssh/known_hosts for
Don’t read the user’s ~/.rhosts and ~/.shosts files
To disable tunneled clear text passwords, change to no here!
Change to yes to enable challenge-response passwords (beware issues with
some PAM modules and threads)
Set this to ‘yes’ to enable PAM authentication, account processing,
and session processing. If this is enabled, PAM authentication will
be allowed through the ChallengeResponseAuthentication and
PasswordAuthentication. Depending on your PAM configuration,
PAM authentication via ChallengeResponseAuthentication may bypass
the setting of “PermitRootLogin without-password”.
If you just want the PAM account and session checks to run without
PAM authentication, then enable this but set PasswordAuthentication
and ChallengeResponseAuthentication to ‘no’.
no default banner path
Allow client to pass locale environment variables
AcceptEnv LANG LC_*
override default of no subsystems
Subsystem sftp /usr/lib/openssh/sftp-server
if somebody can help me to find out where the issue come from …