Issue connecting slave on aws EC2 using JNLP4 to on-premise master

[Ahmed Hosni]

Hi all,

I've just spin up an EC2 on aws running ubuntu 14 with openjdk 1.8, and i'm trying to connect it to a master hosted within internal network running V2.46.1 without any clue:

i've downloaded the slave.jar to my ec2 the ran the following command:

java -jar slave.jar -jnlpUrl <master_url>/computer/<agent_name>/slave-agent.jnlp

The slave can communicate with the master and get the right TCP port already configured in the master but it just hangs in the trying connect JNLP

I was able to to do the same and connect an ubuntu box with the same configuration to the same master but this slave was hosted in our data center and not in aws 

and i configured the command to run on startup as a service 

i've also checked the security groups for the EC2 instance and made sure it's accepting traffic from our subnet  

Here's the output that i get when i try to connect EC2 to the master hosted in our data center using JNLP. this times out after 2 minute with no useful stack trace :

Jul 03, 2017 6:40:15 PM hudson.remoting.jnlp.Main createEngine

INFO: Setting up slave: testNode

Jul 03, 2017 6:40:15 PM hudson.remoting.jnlp.Main$CuiListener <init>

INFO: Jenkins agent is running in headless mode.

Jul 03, 2017 6:40:15 PM hudson.remoting.jnlp.Main$CuiListener status

INFO: Locating server among [<Master_URL>/, http://<IP>:<PORT>/]

Jul 03, 2017 6:40:16 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve

INFO: Remoting server accepts the following protocols: [JNLP4-connect, CLI2-connect, JNLP-connect, Ping, CLI-connect, JNLP2-connect]

Jul 03, 2017 6:40:16 PM hudson.remoting.jnlp.Main$CuiListener status

INFO: Agent discovery successful

  Agent address: <IP>

  Agent port:    59625

  Identity:      7c:f3:ad:89:af:2a:bf:e5:66:59:43:15:c2:ce:fe:44

Jul 03, 2017 6:40:16 PM hudson.remoting.jnlp.Main$CuiListener status

INFO: Handshaking

Jul 03, 2017 6:40:16 PM hudson.remoting.jnlp.Main$CuiListener status

INFO: Connecting to 10.89.234.43:59625

Jul 03, 2017 6:40:16 PM hudson.remoting.jnlp.Main$CuiListener status

INFO: Trying protocol: JNLP4-connect

Jul 03, 2017 6:40:16 PM hudson.remoting.jnlp.Main$CuiListener status

INFO: Remote identity confirmed: 7c:f3:ad:89:af:2a:bf:e5:66:59:43:15:c2:ce:fe:44