Security Testing behind Firewall (no internet access) - soapui.org/xss.js is not reachable?

Hello, I'd like to run my soapui security tests in my office, which is behind a firewall to the internet.

So on my PC, I do not have direct access to the internet.

When I run my SoapUI Security Tests (REST, SOAP on a trial Ready!API ) on my PC, I see that on the cross site scripting test, soapui tries to access http://soapui.org/xss.js  -  but of course it's not reachable from my pc.

Example:

       <unannounced><SCRIPT>document.write("<SCRI");</SCRIPT>PTsrc="http://soapui.org/xss.js"></SCRIPT></unannounced>

This cross site scripting test (default test) then returns OK (because the webservice returned correctly with a soap fault).

But does it make sense to run such test behind a firewall without access to the internet?

What would xss.js do when it would be called? Does soapui react on some response?

Thank you very much

Regards,

RKA