What exactly is a firewall? how does a firewall work? - 5 basic firewall types (2021)

What exactly is a firewall? how does a firewall work? - 5 basic firewall types you must know !
#firewall #networking
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Hi Friends, I am Anshul Tiwari, and welcome to our youtube channel ITkFunde.
More about this video -
In this video, we will discuss firewalls in networking. Many of you had requested a video on this topic so here it is!
Yet again with the help of a real-life example, we will understand how a firewall acts as a security guard for our network protecting us from malicious threats, attacks, etc.
In this video, we will cover -
1) Firewall basics (with real-life example)
2) Firewall design (How firewall works ?)
3) 5 types of firewall we use
- Packet filtering firewall
- Stateful Inspection firewall
- Circuit level gateway firewall
- Application gateway firewall (proxy firewall)
- Firewall as a services (Faas)
I hope after this video you will learn a bit more about firewalls, if you do please hit LIKE, SHARE and SUBSCRIBE. You few seconds in clicking these buttons means a lot for the growth of this channel !
PLEASE WATCH OTHER VIDEOS FROM THE POPULAR PLAYLISTS GIVEN ABOVE. YOUR EVERY SINGLE LIKE, COMMENT, AND SHARE MEANS THE WORLD TO ME!
#itkfunde #keeplearning #keepsharing #keephustling
Credits & Resources -
images - pixabay.com , thenounproject.com
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**About This Channel**
Friends ITkFUNDE channel wants to bring I.T related knowledge, information, career advice, and much more to every individual regardless of whether he or she belongs to I.T or not. This channel is for everyone interested in learning something new!

[@wayner1098]

I heard about Firewall for the first time 8 years back during my first year of engineering. Have seen videos on Firewall from the OEM channels like Palo Alto, Fortinet, etc but I must say this is probably the bestest best explanation I have ever seen 👍.

[@abasiekemeafangideh1680]

I would love to be introduce to someone who can teach programming like you.
You're such a good teacher.

[@karanvyas5155]

I heard about Firewall for the first time 8 years back during my first year of engineering. Have seen videos on Firewall from the OEM channels like Palo Alto, Fortinet, etc but I must say this is probably the bestest best explanation I have ever seen

[@richadwivedi6906]

Sir, the way you teach,nobody else does. Thankful to all your videos.

[@richardnjoku3328]

Many thanks Sir. I will be glad to take practical network courses from you

[@harishjayachandra1356]

Excellent. Very clear and simple to understand. Please keep these types of vides coming for better understanding.

[@catsforhire9116]

Thank you for making all these videos, I'm studying to get CompTIA certificates and your videos help put together a lot of information I read in the books.

[@SanthoshKumar-es3pq]

Perfectly Explained and I'm very thankful to youtube recommendation to find your channel today. I've almost covered 50% of your content and you're making it more easy to understand. GodBless 🥳🥳

[@AnHebrewChild]

Agreed. This dude is the best I've found on TH-cam. His presentation style is super cool, especially his analogies.
Found this channel only a few hours ago... so Im only 20% thru the content at most.... but this quality of instruction is exactly what I've been looking for.
GOD Bless you & him both!

[@SanthoshKumar-es3pq]

@@AnHebrewChild StayBlessed Buddy 🤗

[@john781]

Need 5star review. You guys are really amazing making all doubt clear by once

[@mayamaya706]

Just like what you have done in many of your videos in which you provided simple and relevant analogies for each concept; this has made IT relateble for a non-IT background like me. Unlike lots of IT videos out there, yours are clear, concise and relateble. Keep up the great work.

[@ITkFunde]

Thanks Maya ☺️

[@Kiran-or8pg]

​@@ITkFunde welcome alludu 🤗🤗🤗❤

[@bharatipatil5836]

I loved the way you have clarified many fundamentals on the security!!!!.. thanks a lot for sharing

[@ITkFunde]

Thanks Bharati

[@elishatech4600]

Thanks. I like the way u explained a 🔥🔥🔥 wall in simple terms. Countinue making this kind of stuff don't follow the cloud.

[@ITkFunde]

Thanks Elisha 🙏

[@kinnuc89]

awsome explanation for all videos sir. This made made my basic more clearer to clear interviews

[@manishbaps]

Great real-life example!

[@zesterdrgon3064]

I wish i had a teacher like you at my school.My thought is like only if i have intrest on any topic i concentrate.Looking at your video i dont even fell like skipping any part.
Love you Sir

[@amitavamoulick]

Amazing teaching quality. I am fan of your teaching. Very helpful and clear content.

[@ITkFunde]

Thanks Amitava 🙏

[@prashantk23]

Thanks for explaining in very clear and simple way .🙏

[@ITkFunde]

Thanks Tomms ☺️🙏

[@lallza3463]

This type of content is much appreciated thank u

[@ITkFunde]

Thanks a for your feedback

[@gmil4699]

I'm taking cybersecurity and this is the BEST explanation I've ever heard!

[@rajalakshmi1558]

Really hearfull...🙏Thanks to you to explain the concepts in easy and understanding way expecting more videos especially from cyber security topics.Thanks.

[@nurudeenalaka2351]

Awesome. very clear and educative

[@rajeshmangaonkar13]

Nice explanation in easy words and examples.

[@Nishi-Tiwari]

This is god level content. Thanks Sir

[@sreevanit9395]

Explanation is clear...ur videos really made concepts in a more understandable manner

[@ITkFunde]

Thanks Sreevani

[@hiteshsuthar1097]

Thanks for premium content.. please explain all networking fundamentals that are required in backend as well in cloud.

[@rajeshmoravaneni1360]

Thank you for telling in understandable way.

[@ITkFunde]

Thanks Rajesh

[@rajlakshmipal6526]

Amazing explanation.!!! could you please explain about switches, routers, servers, scada, hmi ?

[@nageshkumar2256]

Very serious and simply superb explanation.

[@ITkFunde]

Thank you Nagesh 🙏☺️

[@eunicechinyere9580]

This is a superb explanation

[@ajithkalidasan580]

You rock man..thanks for the great video

[@ayushchaurasia7729]

superb sir ...thanku

[@maximaximizevitality6405]

Great work!

[@HomeDesign_Austin]

great analogy, keep it up

[@elelolo1049]

Great Teacher.

[@devayaniojha1127]

Thank you... nice video

[@EuphonicSoundz587]

Thanks a MILL dude

[@mraa4950]

I like your way of teaching !

[@ITkFunde]

Thanks a ton 🙏🙏

[@ondruserthamizhaaostd7527]

Great brother

[@abeerkhan129]

Excellent presentation !!

[@ITkFunde]

Thanks Abeer☺️

[@shanthinuguru7538]

Beautiful presentation!

[@ITkFunde]

thanks again☺

[@michaelmartinez9197]

Hi, i like how you explain so muuuuch..!! its so effective to me too, but can you explain it hands on ? it would be very helpful not just for me but also for others like me struggling . Thank you in advance . I followed you and liked your video. Have a good and productive day!

[@HarshSingh-zz1pn]

Best place for learning networking sir plz uploaded a video of supernetting with example question really need to clear concepts

[@ITkFunde]

Thanks Harsh for suggestion 🙏

[@vijayjayaram606]

God level🙏🏼

[@prashantdhingra5619]

Thanks sir for this wonderful video. Please make new videos on network security devices and designing a network.

[@ITkFunde]

Thanks Prashant👍

[@ElreyRayo]

Gracias from Texas

[@ITkFunde]

Thanks a lot 👍👍

[@laxmanraipishon3949]

Thank you ❤

[@user-hn6hp3ih7b]

Thank you teacher

[@nitinvarshneykiet]

I am big fan of the way you teach.. but I am also amazed to see u in different looks in different videos.. and you change urs looks completely.. hahaha. U r innovative in real life with Ur looks 👍👍

[@ITkFunde]

Thanks a lot Nitin never got this compliment and also never realized it but good to know it works 🤓

[@lakshmibhavani893]

How come u read my mind. Thought of complementing this man. On the other side he looks handsome with beared. The way u teach impressive. Usually we search videos when we need to learn something. In ur case I'm searching for something helps from ur channel. Tq so much for spreding knowledge 🤩

[@briwaff8620]

thank you

[@riteshp3722]

Awesome 👍👍

[@starsinthesky5705]

Very nice video

[@md.khaledhasan998]

❣️❣️❣️ Amazing sir

[@ITkFunde]

Thanks Khaled ❤️

[@abebayehuborse9525]

Your Explanation Is Very Nice, Please Could You Tell Me The Way How Can I Get The Theoretical Part Of Your Tutorial?

[@chandramouliramakrishnan9921]

Regarding cloud based firewall using palo alto and how it is architected, if you can have a video will be very helpful. thanks.

[@Waliyyullah]

Keep the %5% bro, Blesses

[@socutebleyhh337]

Hello Mr, could you make a video how to set up access points, i just really love your contents it helps me a lot i think you teach better than my prof in university

[@ITkFunde]

Thanks Dave so glad it helped, i have noted ur suggestion and will try to plan something around access points if few other requests come in

[@PraveenKumar-px9tb]

Sir pls explain about email dns records like SPF, DKIM and DMARC records 👍

[@narinderthapa3204]

God bless u ...

[@ITkFunde]

Thanks papaji 🙏🙏

[@mr.y1856]

Hi sir, could you please explain about ITIL concepts and SLA in detail? Thank you 🙏

[@amazingideas7944]

SLA means Service level agreement which related to ticketing tool

[@ITkFunde]

Thanks for suggestion

[@vaibhavshhh]

Thanks sir. Do you also have videos on ITIL?

[@deepas]

Thank you so much for this. A question, so the firewall types, are they firewalls at the hardware level that you explained? (sorry if my question feels redundant, i'm new to the subject:)

[@Sandu-oj5bl]

Good

[@raghugrinus4779]

Can you suggest the books and courses for understanding deployment and security of network master the skills like you.

[@briwaff8620]

thank you very much
i m karim from morocco in Nort Africa
please more videos hhhh i m bigenner and you give me help

[@ITkFunde]

Thanks sure will keep doing more videos 👍

[@bageeshpv9605]

please do the video about policy and address object,Acl.

[@kaviya.s3127]

Please explain about routing and switching..

[@saurabhlamba8629]

Sir can you cover TLS ,TCP workflow

[@harrysingh-ok3zm]

Sir can you explain how to configure pos machine and after installation what type of problem we face.

[@wayner1098]

This 4th Application Firewall which you explained, is this what we call WAF (Web Application Firewall) or it is something else?

[@jamesndungu5681]

REALLY HELPUL. FOLLOWING ALL VIDEOS COULD YOU SEND THEM IN A SYSTEMATIC WAY. I HAVE SUBSCRIBED

[@ITkFunde]

Thanks James just follow the playlist

[@jayanth1376]

👌👌👌

[@jayanth1376]

Firmware concept pls bro

[@narayannaveen7469]

Make Microsoft sentinel video plz

[@rohinchand]

sir we want fortigate detail and study , basic setup and configuration

[@sayanibhattacharya9055]

Thanking you for uploading the video but I believe you can refine the analogy you are using to explain the different types of firewalls.. Like when you explain stateful firewall, you explained the working saying that the guard is checking with the who he wants to visit, purpose etc. According to my understanding, this would be compared to a case where security guard checks the register and validates if/ when this visitor had visited earlier and allows the visitor after finding previous entry.. Correct me if I am wrong

[@kagabakaratunga6448]

IT k Funde thanks for the work done, how I can get text to read?

[@manjuprasad9828]

Sir what all we need to study for becoming system administrator

[@jaydenritchie1992]

would a gaming server would want applications firewall so unless that application is running it will be filtered, so if each client (user) doesn't supply the same hash value it would possibly be edited game files or cheats?

[@dinesh23ish]

👍

[@jayeshbhavarthe6099]

Plz explain mitre&ck

[@sureshbagiyal91]

sir can a proxy server be used as a firewall

[@ITkFunde]

Hi Suresh we can use proxy firewalls but to know the exact diff btw the two read this www.jigsawacademy.com/blogs/cyber-security/firewall-and-proxy-server/

[@sureshbagiyal91]

@@ITkFunde thanks sir

[@sureshbagiyal91]

Sir, what are green ,red etc zones in firewall

[@rianramadhan8094]

Sir please add translate Indonesian for your video youtube..thanks🙏🙏

[@meghana8993]

Installation, configuration and Troubleshooting of Router ,switch and firewall Issues with respect to BASIC CONCEPTS CAN U TAKE IT.

[@ChandrashekharChowdhury]

How to configure a FIREWALL, BASICALLY SOPHOS 210 FIREWALL AND MERGED TWO
ILL THROUGH FIREWALL........... PLS. CLARIFY ............. it needs very urgent ............
and how to create VPN SERVICE THROUGH FIREWALL.........

[@tahersadeghi6773]

Hard to understand your English. Work on your pronunciation. Learn from the web how to say the words,

[@ITkFunde]

thanks for the feedback 🙏

[@arteygfddfgh]

Budha ho gaya

[@kesavaprasad7958]

Anshul plz remove mostakles as u r looking like old....

[@jatinsharma3792]

You explain the theory which i writtern in the Books and explain example which are useless. You don't know how to teach.

[@redangrybird7564]

Man, your video is good but your accent is unbearable.
I had to mute the video and enable the captions.
You should enable some software that reads scripts in English.

[@user-ml5kv5uf8s]

Sooooooooper sir

[@Jaquelin-ps4td]

👍