Hi -
You're right - "making Tomcat available from outside" should be as simple as opening your firewall to the correct port.
Please try this:
1. Make sure "9090" is the right port ("8080" is a common default port), and make sure you can access Tomcat locally.
EXAMPLE:
http://localhost:9090/myapp
2. Make sure the firewall is indeed open for port 9090.
Make sure there are no restrictions (e.g. on MAC addresses)
Make sure the firewall is configured to direct requests for port 9090 to your Linux server.
3. Make sure there aren't any OTHER firewalls (software or hardware) that might be blocking the connection.
4. Check your Tomcat logs.
'Hope that helps .. PSM