Am 30. Dezember 2017 19:22:54 MEZ schrieb Ilario Gelmetti <iochesonome@gmail.com>:

On 12/30/2017 06:02 PM, Patricio Gibbs wrote:
 In Caimito we want to reduce our use of Internet bandwidth, at least for
 a few weeks until we can get a higher bandwidth connection.
 
 Two ideas:
 1) block certain URLs, such as YouTube,
 2) throttle traffic.
 
 Maybe only during peak traffic hours.

Hi Pato!
For reducing the bandwidth (and decreasing congestion) you can try
installing and configuring qos-scripts
https://lede-project.org/docs/user-guide/traffic_shaping
There's also a web interface packaged as luci-app-qos
https://lede-project.org/packages/pkgdata/luci-app-qos
A problem you will face, I suppose, it's which network interface to
select in configuration. You can try indicating the one used as WAN.
Let us know!
Ciao,
Ilario

PS the bonus feature of having the system activated via email sounds complex