Zoom and firewalls. [View all]

The following was contained in an informational e-mail from our Lutheran synod to churches with respect to Zoom meetings. The purpose of the e-mail was to help the churches protect themselves from "bombers."

Most of your people have decent firewalls in place, except Joe and Bonita Klavern don’t even know what a firewall is, let alone update it.

This was the context.

First things first – your emails. Stop using the CC line for multiple recipients. (Seriously, right now!)
An illustration. You send out an email to your congregation using the CC function. The email goes out to all recipients, with all email addresses being seen by all recipients

I'm not up to snuff with modern technology, but I'm not a luddite either. I sort of know what a firewall is. But this is the first I've heard that I, as an individual, am responsible for installing a firewall on my computer.

Do most people have firewalls? How did they get them? I feel like Bonita and my hubby is Joe. It's not a place I usually inhabit. Please help me understand.

tia
las