To access your encoder from the Internet, you will need to identify your public IP address and configure your router/firewall to forward outside requests on the applicable ports.
You (or a network administrator) must access your network firewall to open and forward these ports to your encoder that is on your local network. This is not a process we are able to support, however, this website, www.portforward.com, provides all sorts of instructions for various routers.
Once your port configuration is completed, from a computer on the same network as your encoder, you can visit http://www.whatismyipaddress.com where your public IP will be displayed. In most situations, using your IP will direct you to your encoder, again, as long as the ports are open and forwarded correctly. You may also add a domain to your public IP or use a dynamic DNS updater (i.e. www.dyndns.com) to keep track of IP address changes if you do not own a static IP address.
Once you’ve made these changes, you can test if the encoder is accessible from the Internet. Using a computer that is outside your firewall, try playing back the encoder source stream in vlc again using the public IP address (example) [rtsp://PUBLIC IP HERE:port/streamname].
You should see your source stream. If you do not see playback, you will need to re-confirm your network security settings or the actual RTSP URL generated via your encoder.
I hope this helps clarify what is needed to pull your source stream into Wowza Cloud.