This one's interesting because it has a very powerful stateful firewall built in, but it doesn't give you much control. If I check this, I'm turning off that aspect of the stateful firewall. You'll notice that there’s also an option to disable port scan and denial-of-service protection. It says “Disable IPv4 Firewall Protection.” If I check this box, I'm essentially just turning off the stateful firewall for that particular type of IP. If you take a look right here, there are some settings on here for a stateful firewall. And in that case, what you're doing is turning on or off the stateful firewall. In most of these SOHO routers, they reduce it to little things like saying disabled port scanning or something like that. So a stateful firewall is a much more complicated tool than a stateless firewall. So the firewall will think, “I'm getting too many malformed packets,” and he'll go ahead and start blocking this stuff. I'm going to start blocking pings.” Or it will sit there and see a bunch of requests for a particular web page, and they're malformed. For example, if we start getting a lot of pings coming into this system, it will say “Hey, there are a lot of pings here. A stateful firewall looks at what's going on and then makes a decision on what it's going to do. (2:46- 4:39) A stateful firewall doesn't have an access control list, per se. But then, we're also going to set up stateful settings. We're going to set up some stateless settings here. So the information is always there, but you're always having to poke around and figure out what to do. Also, keep in mind that every one of these firewalls has a different screen. (2:17-2:45) Access control lists appear all over the world of IT security, and they certainly appear in every firewall out there. We store all of this information in a database, a file known as an access control list. All of these types of blocks are going to be stateless firewall settings. We can block based on words coming in or out of a particular connection. An example of a stateless firewall is if I set up a firewall to always block port 197, even though I don't know what that is. A stateless firewall will go ahead and filter and block stuff, no matter what the situation. (1:30-2:16) The number one thing we need to talk about when we talk about firewalls is stateful versus stateless firewalls. We're also going to see a few other settings in a different place, and we're going to talk about those in just a moment. It took me a while to find this, but if you take a look, most firewalls' settings are right here under security. I've already logged in, so let's see what we need to do. To configure this particular guy, I will open up a web browser to 192.168 0.1. They’re even nice enough to document on the bottom with a built-in username and password that I've already changed. Most of these come by default with a fixed IP address. We're going to go ahead and configure this guy. I've got a cable running into my desktop down here, and here's my monitor and keyboard. So it's graphical, but don't let the pretty graphics fool you. We'll go ahead and set up the firewall on this. And I'm not even going to plug it into the internet. It's considered a SOHO, but it's actually a very high-end router with a built-in firewall. To do that, I've got myself a NETGEAR cable modem firewall. In this episode, I want to cover network firewalls. (0:00- 1:29) When it comes to IT security, a good network firewall isn't a good idea. Click below to get your free courses and other materials.įree Cybersecurity Training How to setup a network firewallīelow is the edited transcript of Mike’s network firewall configuration walkthrough. Learn the basics of setting up a network firewall in this episode featuring Infosec Skills author Mike Myers.Ĭyber Work listeners get free cybersecurity training resources. stateless firewalls and access control lists in this episode of Cyber Work Applied. Learn the basics of configuring a network firewall, including stateful vs.
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