|If your external connection uses the internet, then you're going to experience periods of slow down on that connection as congestion on the internet increases as it always does during periods of peak usage. |
That's the price you pay for using the internet as a WAN link. While VPN and encryption technology can protect your data, you're still at the whims of the overall network.
The only way to avoid this would be to pay a huge amount of money for a dedicated link that isn't shared.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.