Firewall

An intranet is a private network which is heavily protected by different networking devices, such as router, firewall, proxy server, honeynet, IPS and IDS. This diagram is an overly-simplified version of the reality. I try to put these devices together in a reasonable order, only for teaching and learning purpose.
In this video, I will talk about firewall’s basic functions. I will also talk about static and dynamic inspection and their difference.
This is my education channel. My topics cover networking, security, cyber threats and defense, and other computer-related materials.
Please subscribe my channel.
My main entertaining channel:
SunnySunKansas at
/ sunnysunkansas

[@stephenthajeb5836]

I feel like watching your youtube videos for one hour is more useful than my one semester Computer Network CS Course.

[@purnomowikan1026]

Thanks for all your videos Sunny. Your animations, step by step explanations, and clear voice make me understand them easily.

[@Wastelander1972]

Literally the only internet video I’ve seen yet that explains firewalls in depth. Thank you, Sunny. I look forward to watching your videos before I take my CompTIA security+ exam!

[@sunnyclassroom24]

Thanks a lot for your nice comment. I will do my best.

[@indosyncrasies]

Your explanation is to the point and complete. The animation looks deceitfully simple. Thank you, Sunny for your time and efforts.

[@Djsanddy]

you are an amazing teacher Sunny. Helping me a lot for my interview prep . Thanks a ton and keep up the good work.

[@sunnyclassroom24]

Many thanks DJ. Good luck with your interview.

[@nickelmypickle]

When they ask me why im so smart i tell them "that is another story for another video" thanks sunny i love your videos

[@kesaraawinash8038]

My uni lecturers are using your presentations to explain things very clear content ❤️‍🔥

[@tomerkeret2191]

A wonderful video explaining so simply a such complexed subject. Thanks a lot!!

[@nattiemania]

Best online tutor i've seen online so far. Thank you so much

[@sunnyclassroom24]

Thank you very much for your kindness.

[@timshoemaker9023]

Thank you, Sunny! Your video is great. I have learned a great deal. You are a great teacher.

[@sunnyclassroom24]

many thanks for your encouragement. I will do my best.

[@surgingcircuits6955]

Excellent. Going to look for a video on how bridges work. Sounds simple, but have a feeling there may be some hidden gems good to know.

[@MohammedSalemDMC3]

I have been watching u for a while Thank u sunny...great work

[@sunnyclassroom24]

Many thanks for your encouragement. I will do my best. I hope my videos are helpful to understand some networking concepts. Happy New Year to you. Sunny.

[@MHamza-wx5kv]

Your all videos are very informative, easy to understand, and simply brilliant great work sir!

[@sweetmemories4448]

The animation is superb; very carefully and intelligently done to convey the message clearly, which matches with your explanations. Very smart indeed! Keep it up, Sir.

[@rachidmouali7767]

I just started watching your videos, you're really amazing. I love the way you teach and explain using some diagrams. looking forward to watch the other videos. thank you

[@ukbakrol]

Your videos are even helpful for experience people not just beginners.

[@derrickw9309]

The summary page and the illustrations were very helpful in learning this process.

[@sunnyclassroom24]

Thank you very much, Derrick!

[@karticksingh5997]

Hello Sunny, many thanks for sharing this wonderful video. All the parts are clear to me except the dynamic filtering . In technical sense , how is firewall rule configured for dynamic filtering ?

[@TheSuperTeacher]

your teaching methods are amazing! you've got a new subscriber.

[@sunnyclassroom24]

Thank you very much!

[@ganeshgore33]

Such type of good video's I never seen.. Thank you sir Great work

[@sunnyclassroom24]

Thanks a lot and you are welcome!!

[@djshiva]

The summary is VERY helpful. :)

[@sky16678]

Sunny ur a real teacher ...u make things understand and be known

[@sunnyclassroom24]

Thank you very much for your kindness

[@richyoung5586]

The video was very helpful for laying foundation. Thank you, I'm now a subscriber

[@imranahamad1753]

Sunny sir, Best online tutor i'hv ever seen so far..... Requesting you to provide a class on how the traffic flows from external to internal and what happens at each stage (devices).

[@ovvsikt7787]

I would like that too!! :) I am struggeling with this exact stuff at school now

[@Mohan-hy2cd]

superb, concept clearly understood.

[@amosgakwerere266]

Sunny is absolutely amazing please upload many videos for sure, the way you teach is some how beyond my imagination

[@sunnyclassroom24]

Thank you so much 😀

[@villurisatya5132]

Sir, I have watched all your videos. You have done a great job which understand the concept very easily. Could you please provide more information or make video on Transparent Firewall

[@amer7909]

Thanks for all your great efforts

[@octoberpetti8232]

Great stuff, you are awesome!

[@sharanhangal2695]

100% Understood today. How thia firewall works.. Thank you sunny!!

[@sunnyclassroom24]

You are welcome!

[@dinform999]

Awesome videos.. sir..

[@hassangillani11]

Great video. From finland

[@hobbitreal]

Very clear Sunny! 10/10

[@farjanajahannisa9467]

Awesome explanation 🤩

[@seshansesha7645]

Simple and easy to understand... thank you

[@kuruvalavanya4316]

Thank you so much for uploading and supporting us iam preparing to my external exams it was Cristal clear explanation

[@sunnyclassroom24]

You are wecome! Good luck with your exams.

[@susanmyonghee]

Thank you! This video was so very helpful!

[@sunnyclassroom24]

Thanks, Chloe.

[@UTUBEVIEWR]

Excellent info

[@shivrajbhatti1074]

my satisfaction is immeasurable and my day is made :) [the animations really elevated the explanation , I will show this to everyone in my college]

[@sunnyclassroom24]

thank you for sharing it with others. I appreciate it very much.

[@vivekprajapati7911]

thanks sir you are new hope in my learning.....

[@srinivasponnada6421]

Really helpful, thank you Sunny for the useful information. Please post few vedios on NDM

[@sunnyclassroom24]

Thanks for watching. I will put DNM on my to-do-list.

[@balaganeshlakshmanan526]

Thank you very much for technically explained...

[@chethanprabhu4475]

很有帮助。。非常感谢先生

[@sunnyclassroom24]

You are welcome! :)

[@xACExSHARKx]

Thank you, great work.

[@Helldonyt]

hello Sunny you are best teacher thank you

[@haojiejing]

This is so helpful thank you sunny you are the best

[@sunnyclassroom24]

Happy to help!

[@BkodkodA]

Thank you my Friend

[@seetsamolapo5600]

Don't mind me just making myself some notes: Private Networks/intranet are protected by several network security devices: firewalls, proxy servers, DMZs, IPS, IDS Firewall functions (protection of the network) - Port filtering: allows or denies incoming/outgoing traffic based on source or destination application by opening or closing ports -MAC filtering: allows/denied traffic based on the source or destination device - IP filtering: allows/denies outgoing/incoming traffic (packets) based on IP address of IP range - Content filtering: allows/denies traffic based on keywords, by matching strings of characters Port numbers - refer to a certain application MAC address - refer to a certain hardware/device. Unique identifier of a device placed on a NIC. It never changes IP address - refers to a certain network Dynamic/Stateful firewalls - traffic is allowed based on what previous traffic has passed through the firewall as already Port 80 - web applications Port 25 - email applications

[@marcosalameh8677]

So amazing!

[@ogunsadebenjaminadeiyin2729]

Very good video sir. Please which software do you use to make animation videos sir?

[@elikelik3574]

Really helpful. Thanks a lot.

[@sunnyclassroom24]

Thanks a lot for watching and leaving comment.

[@pareshparesh3361]

Hello Sir, Thank you for amazing and meaningfull Presentation !. Could you pls show how to configure windows Firewall?

[@andresihotang2314]

Thank you very much!

[@germanthoughts6920]

thanks sunny

[@creative8181]

#request... Plz make a vedio to explain middleware

[@jasminez8728]

Great 👏🏻👏🏻 thank you

[@ShuyanStoryTeller]

Sunny, you are a great professor.

[@sunnyclassroom24]

Thank you very much! I hope my students think so :)

[@ShuyanStoryTeller]

​@@sunnyclassroom24 I wish you were my professor. you make the concepts easy to understand.

[@sunnyclassroom24]

@@ShuyanStoryTeller thanks a lot. I am honored.

[@ShuyanStoryTeller]

@@sunnyclassroom24 Hi, Sunny, what is the difference between gateway and firewall?I am confused about the concept of gateway, Does gateway have different categories, such as packet filtering gateway, application proxy gateway, Circuit-level gateway or gateway and filtering gateway are different concept? Please:)

[@sunnyclassroom24]

@@ShuyanStoryTeller you are correct. Gateway is very confusing because it is used in many different situations. Gateway is by definition, on the edge of a local area network or a domain. It can refer to a router, or a bridging device connecting to an external network. This device can be anything (firewall, router, or server). I totally agree with you. It would mislead you or confuse you if I try to explain to you.

[@JoanApita]

thank you please keep on posting!

[@sunnyclassroom24]

will do!

[@JoanApita]

cool!

[@kingwallace1]

Great Video. thank you very much.

[@sunnyclassroom24]

You are welcome.

[@sunnyclassroom24]

You are welcome and many thanks for watching.

[@midhunramachandran5131]

Subscribed...

[@jordansison7970]

Hi sir do you have any video regarding the use of port numbers or their specific functions?

[@sunnyclassroom24]

I have one: kzbin.info/www/bejne/rZibeaKpp5djr9k

[@jawadsabih4979]

This information will take 2 whole month to learn in University mean while here it takes 20 min amazing

[@Call-Me-Mama]

Thank you.. Im preparing for my interview and all the network, seemed for me like a big mess.. And then i found your videos.. Clean, nice and easy to understand.. Thank you for making these.. Xie xie Lao Shi ( i hope i wrote it correctly, im really grateful :))

[@sunnyclassroom24]

You are welcome! Good luck with your interview.

[@jf150610]

🔥🔥🔥

[@suay3072]

thanks a lot, but the dynamic filtering still needs a closer look.

[@sunnyclassroom24]

Yes sir. I oversimplify the dynamic filtering. In essence, dynamic filtering is configured to check legitimate data inbound and outbound.

[@choubvisal2923]

can you make video ASA ?

[@muflikhahisna765]

thnkyou

[@SACHIN8270]

Firewall works in which layer and why??

[@dinform999]

Plz make video on DNS

[@sunnyclassroom24]

I will. thanks a lot for your suggestions.

[@alibasim6170]

من طرف ا احمد موسى

[@moulisrinivasan]

If you are interested in network security management, check out Firewall Analyzer: kzbin.info/www/bejne/pKbJqqyVZq-IjcU

[@sunnyclassroom24]

I will. Thank you!

[@rezakuyy1182]

GAK BISA BAHASA INGGRIS