Iptables is a very complex topic, but if we don't try to do too much we can get started with it with what we know now and by the end of the course you'll at least be able to say you can use iptables, even if you're not an expert at it. To give you a taste of the complexity: see what comes up when you search for [https://www.google.ca/search?q=simple+iptables+diagram&tbm=isch simple iptables diagram]. So we'll make our own here:

= Setup =