And I assume that you know that you will need to lookup/google your network’s external IP address (i.e. your WAN address) after you’ve done the other things…and then use that when trying to connect, and not the 192.168… address. I know it’s a basic info, but didn’t want to assume you understood that.
Another thing…depending on your ISP and the kind of Net connection you have, you may or may not have a relatively unchanging IP. For example, Verizon FiOS assigns an IP that pretty much stays unchanged for your connection for months, and even longer. But that may not be the case with your ISP…they may grant you a much shorter IP lease, and your IP address might change every few days (or even hours). So either you have to verify the IP before you leave home everytime…or get a custom host name for your IP from a service like dyndns.com and then regardless of what your external IP is, you can use an address like http://kpansavuth201.dyndns.com (or whatever domain name you like). On the EX2, there is a way to enter that DynDNS info from the dashboard under Settings -> Network -> Network Service -> Dynamic DNS -> ON (and configure). The EX2 will auto-update dyndns service with your latest external IP, if it changes.