SRX

Hello,
I wanted to set the timeout of ssh to 4 hours.
When I type the command:

set applications application junos-ssh inactivity-timeout 14400

Do I get the following message:

error: cannot use reserved identifier: junos-ssh

Software version is: Junos: 18.4R1.8

How did I set the timeout high?

Thank you for your help

Create a custom application and use that application in your policy:

set applications application my-ssh protocol tcp destination-port 22 inactivity-timeout 14400

set security policies from-zone A to-zone B policy Allow-SSH match application my-ssh

Is there another way?
With our old SRX3600 this worked without a problem.
My problem is that I would have to cash out ssh in my-ssh with a lot of rules.

Unfortunately there is no other way. Editing pre-defined applications are not not allowed from version 15.1X49 onwards. Please create a custom application if you would like to change inactivity-timeout

Reference: https://kb.juniper.net/InfoCenter/index?page=content&id=KB31225

It is easy replace old application name with new application name. Please use "replace pattern junos-ssh with my-ssh"

Reference: https://kb.juniper.net/InfoCenter/index?page=content&id=KB11711&cat=T_SERIES&actp=LIST