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security issue for java application->RMI->EJB

 
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Hello,
I am not sure how to configue the firewall/security settings for a Java Application to connect to EJB server via RMI. The java application will be located outside the firewall, while the EJB inside.
Is it a good idea to use one of the two 450's to work as a proxy? Only requests from certain IP's with appropriate certificates will be forwarded to the EJB server.
Thanks.
Best,
Denis
 
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Denis,
As far as my knowledge, the best way to traverse RMI through FW are tunneling. Opening ports is not very common in todays world, and the client can hide behind more then one company FW - hence making management of FW premissions even harder.
 
Denis Wang
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Thanks for your reply.
Since security is a serious issue, I'd rather limit the RMI conservations within the intranet.
 
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