When you connect to a web service and the SOAPAction refers to a URL outside of the service you're connecting to, does it connect to that, as well, to validate?

I ask b/c I have an issue with a hosted application using NuSOAP where port 80 is blocked by default on the network. I just need to know that it's failing b/c port 80 is blocked internally.

Same goes for any validation within the SOAP calls.

TIA!