Firewalls act like the security guards of a network, analyzing all attempts to connect to systems on a network and determining whether the request should be allowed or denied according to the organization’s security policy. In this video, learn the basic functioning of a firewall, including the implicit deny principle.
- [Narrator] If routers and switches are the connectivity…building blocks of a network, firewalls are the security…workhorses.…Firewalls act as the security guards of a…network, analyzing all attempts to connect to systems on a…network and determining whether those requests…should be allowed or denied according…to the organization security policy.…Firewalls often sit at the network perimeter in between an…organizations routers and the internet.…From this network location they…could easily see all inbound and outbound connections.…
Traffic on the internal network may flow between trusted…systems unimpeded but anything crossing the perimeter to or…from the internet must be evaluated by the firewall.…Firewalls often connect three networks together the internet…an internal network and a special purpose network…known as a demilitarized zone or DMZ.…The DMZ contains systems that must accept direct connections…from the outside world such as public web servers.…
The DMZ isolates those systems because they are at higher…
Note: This course is part of a series releasing throughout 2018. A completed learning path of the series will be available once all the courses are released.
- How IP addresses are assigned and managed
- Multilayer protocols
- VPNs and VPN concentrators
- Designing secure networks
- Firewall management techniques
- Maintaining network availability
- Software defined networking (SDN)
- Port isolation
- Network attacks
- How Wi-Fi networks function
- WPA, WPS, and propagation attacks
- Host-based network security control
Skill Level Advanced
Insights from a Cybersecurity Professionalwith Mike Chapple32m 15s Appropriate for all
1. TCP/IP Networking
2. Network Security Devices
3. Designing Secure Networks
4. Specialized Networking
5. Secure Network Management
6. Virtualized Networks
Port isolation1m 47s
7. Network Attacks
8. Transport Encryption
9. Wireless Networking
10. Host Security
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.