What is firewall? | Types of firewall | network firewall security | TechTerms
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- čas přidán 25. 03. 2017
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Firewalls protect our computers from internet hackers. Internet hackers can steal our bank details from our computers and can reduce our bank balance from 1000s of dollars to 0 in seconds. So, firewall is must in a computer / computer network.
Starting with packet filtering firewall.
Suppose, I am downloading a file from internet. When the data-packet arrives a packet-filtering firewall, it only checks sender’s and receiver’s IP address and the port number.
If the everything is OK, then data packet is allowed to pass through packet-filtering firewall and then to my computer.
This checking process is done as per rules written in a list called access control list.
The only limitation (caveats) of packet filtering firewall is that it do not checks the data portion, i.e. Payload, of the data packet. So, a hacker could send some malicious data packed in this payload section.
The 2nd one is application / proxy firewall:
proxy firewall do not let the web server know which computer actually wants to visit the requested website, i.e. proxy firewall hides us from the attackers in internet.
Since, the application firewalls also check the data contents of the received data packet so they are generally much slower than packet-filtering firewalls.
3rd is Hybrid firewalls:
Hybrid firewalls combines packet filtering firewall and application firewall in series to enhance the security.
If they are connected in parallel then the security of the connection will be reduced to the parameters defined by the packet filtering firewall, i.e. application firewall will be of no use if the two firewalls are connected in parallel.
For this reason, hybrid firewalls use packet filtering and application firewall in series. #TechTerms
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Now every time I think about proxy.... I will remember my mom ❤️❤️
within 5 mins , i it covers a 1hr class's information.thanks
Thanks Sir.
@@TechTermsDG " Remove the background music .. And talk little bit slow i have to play it on 0.75x to understand 😂😂😂..
Many Thanks bro.." this is educational material. Remove that nonsense noise, your video is global not for India consumption!
@@timnoe19
@@timnoe19 the voice is some standup comedy material but I hope they improve upon
I had a 1 hour lecture on proxy firewalls in uni and didn't understand it. You explained them in 2 minutes and it makes complete sense. Thanks
#😅
Jio mere laal ... kya mast samjhaya hai ......shukriya bhai
Short, clear and easy to understand
Thank you, made my revision easy.
I learning more than in classes. Lol
This video is so easy to understand about the firewalls types and their functionalities rather than going with the subject theory. Thanks TechTerms....
This is very clearly explained in an effective manner, thanks!
Never ever learnt something in such a fun way prior to watching this video....kudos to the team 🔥🎉
This is really nice video to understand the concept in short.
Pls add one more video which completely explain, how any website or web application works end to end on network.
Hi Tushar, You can watch OSI Model Explained which will give you an idea of the way of working of web applications.
Next video to be uploaded is on DNS. That will explain the same as per your need.
Good ... Proxy is defined in very simple way ... Thanks
Short, concise, lucid and up to the mark....great work mate !!
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Bhai ekdam best
It's very simple and easy way to learn about firewall which you have provided. Thank you so much!!!!!
You are the best 💛
i have shared this lecture to my all classmates and all of them including me understood this first time in a clear way. minathwar!
I really get the benefit I was looking to know. Thank you.!
Very interesting Thank You 😊 last minute exam revision
You explained this so well! Thank you!
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Thank you sir. It feels good to hear that you find this video good for time investment. Thanks a lot.
Perfectly executed ✌
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Thanks AllInOne.
i like the explanation with your mom. it makes things very clear. good job mate
Very helpful video. Very clear, simple and easy to understand examples. Thank you Sir!
Well explained. Just the right level of detail to be able to decide what to learn next.
with in about 5 mins it covered a 2 hour uni lecture thank u
You are awesome!!! Thank you, it is so simple to understand you and the way you compare things is great!!!
Good luck there! Waiting for more
Thank you sir. It feels great when someone finds someone's content useful. You find my content - simple to understand. It is the biggest reward for me. Thank you so much.
Way of explanation is too good and simple. Thank You !!
Simply love this...thats all
5min quick video was really helpful. Thanks.
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Thanks .. it's much short n sweet :)
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Excellent lecture.....
Excellent explanation! Thank you.
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mind blowing explanation................
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Thnk u. Nyc video.
Useful information, Thanks...
Crazy!!!!👍👍👍👍 THANK YOU
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Thank you bro.
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Liked and subscribed!
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Thanks Ronald D'mello !
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its a broad subject , Good Job!!!
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covered my module in mins appreciated
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with great knowledge
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its such a very helpful lecture for me i understand the whole cocept that maybe i cant understand in 5 lectures thanks a lot
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