minor organization edits regarding wifi options, add note about netwo…

…rks potentially only allowing http(s)

docs/docs/Usage and maintenance/Wifi/understanding-wifi-options.md

@@ -1,8 +1,8 @@
-# Understanding your wifi options
+# Wifi overview
 
 If you want to keep your rig small and portable, using the internet will be important (assuming you are using a Dexcom CGM) to keep BG values flowing to the loop.  Ways your rig can stay online and access the internet are:
 
-* Joining known wifi networks [(you'll be able to add more wifi networks to your rig in the future)](<../Usage and maintenance/Wifi/on-the-go-wifi-adding>)
+* Joining known wifi networks
 * BT-tethering to your cell phone's hotspot 
 * Wifi-tethering to your cell phone's hotspot
 * Wifi-tethering to mifi device
@@ -45,6 +45,8 @@ School districts vary widely in their wifi structure and access.  Start talking
 
 If you are sending your t1d kid to school with an OpenAPS rig, getting on the school's wifi network will save you cell phone data and phone battery.  Some school districts will need the MAC address of the rig to add it to their "approved" devices list.  Other school districts may provide a special login for the rig.
 
+It is common for educational networks not to provide full Internet access, just web - i.e., they allow HTTP(S) but not other protocols like SSH. In this case, your child's online rig may "work" at school and send/receive data from Nightscout, but will not be accessible via SSH and may not send logs to Papertrail.
+
 If the school district refuses to allow the rig access to the school's wifi network, you can use BT tethering to your phone's hotspot to stay online while at school.  The downside is that you will be using your cell data during the school day and it will cause added drain on the phone's battery.  
 
 In some cases, schools have let the phone on the school's wifi but not the rig.  Unfortunately though, this won't help much if your kid uses an iPhone.  IPhones do not allow the rig to be on the phone's hotspot while the phone is also on school's wifi.  So, when the rig connects to the iPhone, the iPhone will disconnect from the school's wifi.  Androids (some of them at least) are able to maintain a wifi connection while the rig is tethered to its hotspot.