openjms behind a gnatbox firewall

Posted on 2004-09-08
Last Modified: 2010-03-31
I can not figure out what ports to open up to allow openjms to communicate using the RMI protocol through a gnatbox ... Any body?
Question by:akruger
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
LVL 35

Expert Comment

ID: 12005100
The defautl port is 3030 (from:
LVL 35

Expert Comment

ID: 12005102
If you also ned to open an RMI port, it defaults to 1099.

Author Comment

ID: 12009780
Right ... I have opened up port 1099 tcp through the firewall because I am using RMI ...
Inside the firewall it works like a charm .... so openjms is set up correctly

I open up a NAT to the host running openjms and then open up a filter to the host using TCP.

When I watch the logs it looks like a connection is made ... but no data ever flows ... so do I have to open up UDP/ICMP or something else to get RMI to work?

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

LVL 35

Expert Comment

ID: 12010793
>  so do I have to open up UDP/ICMP or something else to get RMI to work?

You shouldn't, opening up port 1099 should be enough. Have you checked if RMI is using the default port, you might have configured it to use some other port.

Author Comment

ID: 12013013
I have kept digging and RMI uses a random port ... not nice in a firewall.  Will have to use TCP ...
LVL 35

Accepted Solution

girionis earned 250 total points
ID: 12014007
This shouldn't happen. How do you start the rmiregistry. You can assign a port while you start it:

rmiregistry 1099

Featured Post

Enroll in June's Course of the Month

June’s Course of the Month is now available! Experts Exchange’s Premium Members, Team Accounts, and Qualified Experts have access to a complimentary course each month as part of their membership—an extra way to sharpen your skills and increase training.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
In this post we will learn different types of Android Layout and some basics of an Android App.
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question