RMI callback and firewalls

Discussion in 'Java' started by Alex Molochnikov, Jul 7, 2003.

  1. One of the solutions to this pesky problem advocated by Sun is a
    custom-written Application-level Proxy. According to them, the proxy
    (Java-based app that sits between the client and the server) should run on
    the firewall machine, and maintain RMI connections with both parties.

    Has anyone ever implemented such a solution? I looked through formus, but
    found nothing beyond the original Sun Q&A
    (http://java.sun.com/j2se/1.3/docs/guide/rmi/faq.html#firewallIn). Are there
    any pitfalls in this approach? What happens if the firewall blocks all ports
    by default and opens only specific ones? Will the Java app running on the
    same host as the firewall have problems opening RMI ports?

    I will appreciate any clues.

    Alex Molochnikov
    Gestalt Corporation
    Alex Molochnikov, Jul 7, 2003
    #1
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  2. Alex Molochnikov

    EJP Guest

    We at Telekinesis Pty Ltd have done this and offer it as a commercial
    product. See http://www.rmiproxy.com.

    EJP

    Alex Molochnikov wrote:
    >
    > One of the solutions to this pesky problem advocated by Sun is a
    > custom-written Application-level Proxy. According to them, the proxy
    > (Java-based app that sits between the client and the server) should run on
    > the firewall machine, and maintain RMI connections with both parties.
    >
    > Has anyone ever implemented such a solution? I looked through formus, but
    > found nothing beyond the original Sun Q&A
    > (http://java.sun.com/j2se/1.3/docs/guide/rmi/faq.html#firewallIn). Are there
    > any pitfalls in this approach? What happens if the firewall blocks all ports
    > by default and opens only specific ones? Will the Java app running on the
    > same host as the firewall have problems opening RMI ports?
    >
    > I will appreciate any clues.
    >
    > Alex Molochnikov
    > Gestalt Corporation
    EJP, Aug 4, 2003
    #2
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