java.net.UnknownHostException when calling a web service from Java client

I have access to a WSDL which I can open in a web browser. I generated Java proxy/stub using axis2 runtime(I am using Eclipse IDE with axis plugin). I am trying to connect to this web service using this proxy. I pass the URL mentioned in <soap:address location>child of <wsdl:port binding>element of the WSDL file. But when I run my code, I get UnknownHostException.

How do I know which URL to use to call the service?

Please help..

Thanks.

Could the fact that I am executing this code from behind a firewall be causing a problem?

If I am not mistaken we should be able to invoke the web service using the Hardcoded URL(EPR) in the wsdl:service element of the WSDL file. Are there any alternatives to this?

I found the problem. This was because of the firewall.