Shielded Ultrapeer is a normal status for leaf nodes.
I'm not sure what it is you are attempting to accomplish?However, I think that you have done a lot more than you needed to.
With that being said. you will not become an ultrapeer if you cannot receive connections. You will not become an ultrapeer if you machine has a history of short or low uptimes. You will not become an ultrapeer if you have a low bandwidth connection and finally, you will not become an ultrapeer if the network doesn't need anymore.
If you want to port scan your computer try this
http://scan.sygate.com
They offer several different types of scans.
My recommendation do only that which is necessary to achieve the desired result.