Hey everybody and welcome to the next video in the module.
So in this video we're gonna be talking about packet filtering firewalls.
Now packet filtering firewall is also known as a stateless inspection firewall.
Both names are completely fine.
Now this type of firewall allows or denies it's type of their packets based on the following source
IP or destination IP source port and destination port.
What's important here is it does not look at the packet or the data itself.
This is just the IP header information.
Now this type of firewall is not commonly used.
This is might be used in a few key situations but in general this provides weak protection due to the
limitations on access rules.
So what I'm referring to here is the ability to bypass the rules with tunneling.
So because the data it does the firewall does not look at the data itself it doesn't know that a web
port is now going through or web traffic is now going through some random 10000 port or that a web traffic
is going over port twenty to SSA it should be.
Now that's a different technique that we're going to go over later in the videos when we go over SSA
tunneling and HDD tunneling.
But just understand that it can be you can bypass packet filtering firewalls that way because of the
limitations on it not looking at the packets themselves.