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Scenario 2

Java Applet to Sybase Database with Security Bypass

In Scenario 2, a Sybase database server provides data to a client running a Java applet application server. This configuration requires network hopping to bypass the Java security feature that limits socket access to the machine from which the applet was loaded.

This scenario can also be used to get through a firewall.

The components, URLs, user names and passwords are all examples. You must substitute the correct values for your own site.



 »  VORTEXjava as part of applet.
 »  connection call for db.connect():

Client serving as application server and network hopper

 »  machine name: mysrv
 »  machine operating system: Solaris
 »  VORTEXnet


 »  machine name: mysyb
 »  machine operaing system: Solaris
 »  Sybase userid: sa
 »  Sybase passwd: sa
 »  Sybase dbname: master2
 »  Sybase home: /usr/sybase
 »  VORTEXnet


  1. Set the SYBASE environment variable to /usr/sybase.
  2. The VORTEXnet evaluation kit, which includes the daemon and driver, is installed in /usr2/trifox/bin on both mysrv and mysyb.
  3. The VORTEXdaemon, vtxnetd, is started on mysrv and mysyb as follows:
        vtxnetd -p1958 &
  4. When db.connect(), a message is sent via the socket (port 1958) to vtxnetd on mysrv to start up vtxhost.net.
  5. vtxhost.net is given the service string sa/sa/master2@1958:mysyb!/usr2/trim/bin/vtxhost.syb,SYBASE=/usr/sybase, which tells it to send a message via the socket (port 1958) to vtxnetd on mysyb to start up vtxhost.syb.

© 1985-2020 Updated 26 Sep 2005.