Mike shows you how to keep bad guys from getting into your network from the outside.
- 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 wanna do is use this diagram here,…and I wanna talk about our firewall.…In this case it's gonna be an external hardware firewall.…This is my network out here.…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 firewall, and 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 it's filtering that traffic…based on primarily IP address and port number.…So I can go into this firewall right here…and I can create an access control list,…and in that access control list,…
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- What is risk management?
- Managing change to a network
- Mitigating network threats
- Training users
- Denial of service and social engineering attacks
- Hardening devices
- Testing network security
- Network monitoring
- Security information and event management (SIEM) tools