Question: For some weird reason I am not able to connect using `VisualVM` or `jconsole` to a JMX.

The parameters used to start the VM to be monitored:

```
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.port=1100

```

I checked, and I can telnet to this port, from both locally and remotely.

Still, VisualVM or jconsole are failing to connect, after spending some considerably time trying to.

```
REMOTE MACHINE with JMX (debian)
java version "1.6.0_33"
Java(TM) SE Runtime Environment (build 1.6.0_33-b03-424-11M3720)
Java HotSpot(TM) 64-Bit Server VM (build 20.8-b03-424, mixed mode)

MY WORKSTATION (OS X)
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)

```

What is the problem?

Answer: 
My two cents to the above answers..

I see most of the answers has mentioned only about the hostnames but no port. If we haven't specified ports, then server will dynamically assign RMI port. There wont be any issues, if both the servers are in same subnet or no firewall issues. If there is any concerns, we can add below JVM parameter to freeze.

```
-Dcom.sun.management.jmxremote.rmi.port

```

Ex:

```
<option name="-Dcom.sun.management.jmxremote.rmi.port" value="11001"/>

```

Make sure both RMI and JMX ports should be the same. For more, [click here](https://docs.oracle.com/javase/9/management/monitoring-and-management-using-jmx-technology.htm#JSMGM-GUID-F08985BB-629A-4FBF-A0CB-8762DF7590E0)
The following worked for me, thanks to @Arpit Agarwal. Added this additional jvm parameter which worked for me.

```
    -Djava.rmi.server.hostname=192.168.1.16

```

Complete list which worked for me.

```
 -Dcom.sun.management.jmxremote 
 -Dcom.sun.management.jmxremote.port=21845
 -Dcom.sun.management.jmxremote.ssl=false 
 -Dcom.sun.management.jmxremote.authenticate=false
 -Dcom.sun.management.jmxremote.local.only=false 
 -Djava.rmi.server.hostname=192.168.1.16
 -Dcom.sun.management.jmxremote.rmi.port=10099 

```