Sparkweb using WAN IP

Hi, I’ve successfully setup Openfire, Spark IM client connecting. Tried setting up Spark Web (locally), how about Spark Web via WAN, is there a setting I need to change in IIS besides changing IP from local to WAN under Edit Bindings?

Locally in a sense when I entered:

http://:7070, it works, Is it also possible in external or WAN?

As in when I typed in:

http://:7070?

or

http:// :7070

Thanks

jepoy