Absolutely it would because jails doesn't do weird shit like this from the get go.
With FreeBSD, you have to deliberately open ports, not the other away around.
I don't understand your second sentence.
"average user stress test"??
>>Gud+(OP)
> With FreeBSD, you have to deliberately open ports
The issue outlined in the article happened because the author deliberately open their service to the public internet. Replacing Linux with FreeBSD wouldn't have prevented the compromise.