Introduction to Networking Part 18 | Network Basics for Beginners - Firewalls

Networking Fundamentals | Networking Basics | Learn Networking For Hacking | Networking Firewalls

What is a Firewall?
Scans incomming network traffic

Can have two forms:
Software Firewall
Hardware Firewall

Software Firewalls
Installed on clients
Have all client information
Make very specific rules

Inexpensive but vulnerable
Vulnerable to OS Attacks.

Hardware Firewalls
Physical Devices

More robust / configurable

Designed to handle traffic from multiple computers

Port Security
There is two types of ports
Logical (TCP/IP) Ports
Physical Ports

Traffic is defined using IP and Port.

Combination of both Software and Hardware
By combining Physical firewall with routers/Switches we achieve several advantages
Save money
Save Time

Our defensive is broken if our device is, so we need to combine not only a device and a hardware firewall but both Hardware and Software firewalls.