I have tested which fw is allowed jenkins directly access is ok to target host.

I am trying to use 'jumphost' feature in my env,  after test with below error. 

From linux secure log on jumphost, can not find jenkins host passed ssh tunnel request. 

Can you help? Thank you.

[my env topology]

172.16.4.200(jenkins) --> 172.16.4.201(jumphost, fw allowed) --> 172.16.248.11(target)

[ERROR]

jenkins.plugins.publish_over.BapPublisherException: Failed to connect and initialize SSH connection. Message: [Failed to connect session for config [app]. Message [timeout: socket is not established]]