How to set URL of application

Hi, I have application which runs on private network. It has URL
http://hostname:8080/application. I need access for this application
from outside. So I expose this application out on URL
http:outsideAddress/application. But when I try to access on this
addess, application redirects to internal address and application
doesn't run. Is there any possibility how to set URL for application?
Does any solution exist for this problem?

Thanks.

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