Part two is how to get an address from outside since the internet provider can change your address at will. Here I use fapcam1 with port 9880 as an example and the directory chosen in the initial setup is cam1.
At the remote location, login to the internet wireless with another computer. In a browser, go to freedns.afraid.org. Create a free account and then create a Type A subdomain such as fap.chickenkiller.com (there are other free options than chickenkiller.com available if you prefer) Create one more subdomains such as fapcam1.chickenkiller.com, also Type A. There is a maximum of 5 for free. This next step is the critical one to getting access from outside the local network. From the Subdomains page in FreeDNS, click on the fapcam1 entry and then click on Forward to a URL and redirect to the address
The initial fap.chickenkiller.com is essentially the modem, and we will redirect the ports to the different ZeroWs.
Next go to the dynamic DNS section https://freedns.afraid.org/dynamic/index.php
. The last line at the bottom has a link to a quick cron example on the bottom right. Click on that and then copy the last line (probably looks like two lines). Then
$ sudo crontab -e
and paste that line in the bottom of the crontab file. Save and exit. This code will continually update the variable IP address your Internet provider gives you making fap.chickenkiller.com robust to random changes in the IP address.