Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
http://www.cisco.com/c/en/us/td/docs/routers/access/2800/hardware/installation/guide/hw/10_hw.html#wp1026186
harbor235 ;}