https://issues.jenkins-ci.org/browse/JENKINS-36420 and https://issues.jenkins-ci.org/browse/JENKINS-55978 were implemented and they are honoured if you use the OS provided ssh client (Mac OS X at least).

However if you execute the same command through the Jenkins CLI command with the -ssh option, the timeout is ignored.

Reproduction steps

• Run Jenkins with the property -Dorg.jenkinsci.main.modules.sshd.SSHD.idle-timeout=0
• Create a pipeline with a sleep higher than 10 minutes:

• stage('10 Minute Wait') {
      echo "Started the 10 minute wait"
      sleep(time:610,unit:"SECONDS")
      echo "The big sleep is over"
  }

• Build the job remotely through CLI

• java -jar jenkins-cli.jar -s $MY_JENKINS_SERVER -user $USER -ssh -i "id_rsa" build $JOB -v -s