I am setting up a couple of IP cameras and a ftp server on my home network. I want to know if I can access them from outside. I know that I can go outside and use some free wifi connections such as McDonald or Starbucks and try from there. This may mean a few trips from home if I am doing debugging and fixing. Can I do some setup at home to simulate access from outside ? Then I only have to go outside once to do the final confirmation if the simulation works.