SSH Timeout

It seems newer firmware versions of the CK3 have a SSH timeout of 70? seconds, such that if there's no communication the PMAC will close the connection.

This causes problem for our software, is it possible to set this timeout period?

Hello, I've had same problems too.

You can set it in 'Tools -> option -> Power PMAC -> Communication Settings'

I was not able to duplicate this issue.

Can this be observed by logging in with putty (through SSH) and then letting the window sit for more than 70 seconds?

What is the form factor and firmware version? I am using a CK3E with 2.6.1.0

This ended up moving to email and likely has been resolved.

It seems like it's some settings in Linux--specifically "ClientAliveCountMax" and "ClientAliveInterval" in the file located in "/.readonly/etc/ssh/sshd_config".

Increasing these variables should increase the timeout before the ssh session is closed.

(Alternately, setting ClientAliveInterval to 0 should disable this timeout altogether)

Mr. Park's advice is correct. I edited the sshd_config file directly using putty but the Tools -> Options -> Power PMAC -> Communication Settings contains the same settings.

Thanks!

Unfortunately, I tried the two solutions you mentioned to change the cpu101 in my hand, but the ssh parameters could not be saved.

On 12/6/2021 at 8:27 PM, JeffB said:

he sshd_config file directly using putty but the Tools -> Options -> Power PMAC -> Commun

how TO EDIT the readonly file？ very thanks！

Option 1

When you edit the values in the IDE a linux file with the correct settings is created, but it will not survive reboot. You can move this file to the saved location to make changes permeant. This can be done from the IDE terminal.

System mount -o remount,rw
System cp /.readonly/etc/ssh/ssh_config /.readonly/etc/ssh/ssh_config_backup
System cp /etc/ssh/ssh_config /.readonly/etc/ssh/ssh_config
System mount -o remount,ro /

Option 2

Add just the alive interval.

System mount –o remount,rw /
System sed -ie '/^Host */a ClientAliveInterval 0' /.readonly/etc/ssh/ssh_config
System mount –o remount,ro /

Option 3

Add all needed lines to the file. This can be done through Putty.

mount -o remount,rw
nano /.readonly/etc/ssh/ssh_config
[Move to end of file with arrow keys]
[Paste with right click]
[Ctrl-X, Y, ENTER]
mount -o remount,ro /

These are the lines to paste. Change X to an integer or leave it out.

ClientAliveCountMax X
ClientAliveInterval 0

very thanks ，i try your suggestion but i just can't find the backup file.My firm is 2.6.0.0.

43 minutes ago, Eric Hotchkiss said:

When you edit the values in the IDE a linux file with the correct settings is created, but it will not survive reboot. You can move this file to the saved location to make changes permeant. To do this:

mount -o remount,rw
cp /.readonly/etc/ssh/ssh_config /.readonly/etc/ssh/ssh_config_backup
cp /etc/ssh/ssh_config /.readonly/etc/ssh/ssh_config
mount -o remount,ro /

Another option would be to add only the needed lines to the file

mount -o remount,rw
nano /.readonly/etc/ssh/ssh_config
[Paste with right click]
[Ctrl-X, Y, ENTER]
mount -o remount,ro /

These are the lines to paste. Change X to an integer or leave it out.

ClientAliveCountMax X
ClientAliveInterval 0

 

I'm executing a script connecting via password-less SSH on a remote host. I want to set a timeout, so that if the remote host is taking an infinite time to run, I want to come out of that ssh session and continue other lines in my sh script.

How can I set a timeout?