Join Mike Meyers for an in-depth discussion in this video Firewalls, part of CompTIA Network+ (N10-006) Cert Prep: 7 Managing the Network.
- Now that we know where firewalls are located…let's talk about what firewalls actually do.…Now a firewall, by definition,…is something that filters traffic based on criteria,…all right.…Now what I want to do is use this diagram here…and I want to talk about our firewall,…in this case it's gonna be…an external hardware firewall.…This is my network out here…and this is the bad evil world out here.…In fact, I'm gonna just unplug this…so we can just look at this part.…Now when we take a look at a firewall…it's gonna do one of two big things.…
It's either, or, going to do what we call…stateless firewalling, or stateful firewalling.…Let's talk about both of these.…Stateless firewalling is like the original…type of firewalling, this goes way back.…With a stateless firewall…all this firewall is looking at…is data that's coming in, or going out…of the network, and is filtering that traffic…based on primarily, IP address, and port numbers.…So I can go into this firewall right here…and I can create an access control list,…
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Skill Level Intermediate
1. Managing Risk
2. Protecting Your Network
3. Network Monitoring
4. Network Troubleshooting
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