What is DNS? Introduction to Domain Name System. SXSW giveaway!

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Күн бұрын

Fasthosts Techie Test competition is now closed! Learn more about Fasthosts here: www.fasthosts.co.uk/davidbombal
What is DNS (Domain Name System)? How does DNS actually work? This video shows you practical examples of DNS in real time and includes Wireshark captures showing you actual DNS query and answer messages.
======================
Giveaways:
======================
SXSW Trip: www.fasthosts.co.uk/davidbombal
Wireshark Course: See hidden link in video
SDN Course: See hidden link in video
Linux Course: See hidden link in video
======================
Menu:
======================
What does DNS do? 00:00
Why do we use DNS? 2:10
Analogy of DNS: 4:00
SXSW: 5:25
Practical DNS: 7:30
Lab: 8:20
Wireshark capture of DNS: 9:50
Edit Windows host file: 15:45
Use a Cisco router as a DNS server: 18:22
nslookup IPv4 / IPv6: 23:09
Rogue DNS example: 24:35
Ubuntu DNS server setup (dnsmasq): 25:47
======================
CCNA content:
======================
Free CCNA content: • Packet Tracer: CCNA Ex...
CCNA course: bit.ly/2PmTVPD
======================
Dnsmasq setup:
======================
sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved
Edit the /etc/resolv.conf file to contain the following entry:
nameserver 8.8.8.8
Now install dnsmasq
sudo apt install dnsmasq
uncomment these lines:
port=53
domain-needed
bogus-priv
no-resolv
Add your domains below the no-resolv line:
address=/r1.home.com/10.1.1.254
address=/myrouter.home.com/10.1.1.254
Set your public server to Google for example:
server=8.8.8.8
DNS
DHCP
EVE-NG
GNS3
VIRL
Packet Tracer
10x Engineer
CCNA
Cisco Devnet Associate
CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional
LPIC 1
LPIC 2
Linux Professional Institute
LX0-103
LX0-104
XK0-004
Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel!
========================
#dns #sxsw #wireshark

Пікірлер: 155

@davidbombal 4 жыл бұрын

Menu: What does DNS do? 00:00 Why do we use DNS? 2:10 Analogy of DNS: 4:00 SXSW: 5:25 Practical DNS: 7:30 Lab: 8:20 Wireshark capture of DNS: 9:50 Edit Windows host file: 15:45 Use a Cisco router as a DNS server: 18:22 nslookup IPv4 / IPv6: 23:09 Rogue DNS example: 24:35 Ubuntu DNS server setup (dnsmasq): 25:47 ====================== Giveaways: ====================== SXSW Trip: www.fasthosts.co.uk/davidbombal Wireshark Course: See hidden link in video SDN Course: See hidden link in video Linux Course: See hidden link in video ====================== CCNA content: ====================== Free CCNA content: kzfaq.info/sun/PLhfrWIlLOoKM3niunUBTLjOR4gMt_uR_a ====================== Dnsmasq setup: ====================== sudo systemctl disable systemd-resolved sudo systemctl stop systemd-resolved #Option 1: Edit the /etc/resolv.conf file to contain the following entry: nameserver 8.8.8.8 #Option 2: sudo rm /etc/resolv.conf echo "nameserver 8.8.8.8" > /etc/resolv.conf #Now install dnsmasq sudo apt install dnsmasq #uncomment these lines: port=53 domain-needed bogus-priv no-resolv #Add your domains below the no-resolv line: address=/r1.home.com/10.1.1.254 address=/myrouter.home.com/10.1.1.254 #Set your public server to Google for example: server=8.8.8.8

@shaggy6249 8 ай бұрын

Very informative! I appreciate your understanding that some people are just getting into this topic and taking the time to explain how the little things come into play

@zelaznog73 4 жыл бұрын

Great way to begin the new year, congrats for continuing with the giveaways, is a good way to keep us motivated and continuing learning.

@davidbombal 4 жыл бұрын

Thank you! Appreciate the support.

@damianentropy 2 жыл бұрын

Very useful video! Seeing how this process is captured on wireshark clarified the whole process for me. Thank you.

@genezor 2 жыл бұрын

Thanks for the informative DNS subject material as well as being super polite

@daddy9004 4 жыл бұрын

Thank you very much for this content. I've been looking for a good DNS tutorial for a while now!

@davidbombal 4 жыл бұрын

Thank you! Hope you learn something new :)

@lokeshkatiyar7930 4 жыл бұрын

Thank you so much David i have got all three courses however last month I purchased your SDN tutorials from Udemy but still got Linux and wireshark free. I am so happy...thanks David I wish you get more sponsors

@davidbombal 4 жыл бұрын

Thank you for the support Lokesh

@NinjaScorpio 4 жыл бұрын

OMG thank you so much for the giveaway!!! I Cant believe you are giving away your Linux and Wireshark course!

@davidbombal 4 жыл бұрын

Enjoy the courses Paulo!

@jairusan 4 жыл бұрын

Excellent David, kept pretty general highlighting the important things. Thanks again for the great information, and regarding the sponsorship of companies for your videos, of course I believe it's a win win for everyone 👍 have a great day and until then.

@davidbombal 4 жыл бұрын

Thank Jair

@taherkhedher6167 4 жыл бұрын

I got all the 3 free courses, thank you David for the new learning materials, have a nice week 💙.

@davidbombal 4 жыл бұрын

Congratulations! Enjoy!

@johnnykingston1045 2 жыл бұрын

Thanks David for another great video! Good job!

@SantiagoRebella 4 жыл бұрын

Thanks for the courses and the explanation! very clear David! :D

@davidbombal 4 жыл бұрын

Thank you Santiago

@affreenmjha4113 Жыл бұрын

When nothing in life works, just listening to your videos restore hope

@IPvZero 4 жыл бұрын

Great to see you getting the support of sponsers, David. And so long as they're meeting your standards (ie high quality/no scammers) then it can only be a positive thing, imo!

@davidbombal 4 жыл бұрын

Thank you John - appreciate the feedback. Been a long journey, but glad it is happening now. One of these days it will be your turn :)

@IPvZero 4 жыл бұрын

@@davidbombal Haha! That would be nice. Got a loooong way to go but I'm enjoying the journey. Your channel is the gold standard so it's encouraging to see high quality content get rewarded over clickbait. Seems like it was only a month ago you were at 100K and now it's almost 150. You'll be at a million within 18 months at this rate haha.

@davidbombal 4 жыл бұрын

@@IPvZero Appreciate that John! Don't give up - keep hitting publish :)

@TheMaurya3 4 жыл бұрын

Absolutely 👍

@medinusa1 4 жыл бұрын

You are a great man ! your KZfaq channel is the most valuable in IT

@davidbombal 4 жыл бұрын

Thank you! Appreciate that compliment!

@scottspa74 2 жыл бұрын

Great video, thank you! I really need to get GNS3 one of these days. It looks so much more robust than packet tracer.

@KevinLudwick 4 жыл бұрын

Wow, this is fantastic info! Thanks David!

@davidbombal 4 жыл бұрын

Thank you Kevin

@gbadri1 3 жыл бұрын

Absolutely as you have the knack how to explain and teach this stuff

@thivakaran6849 4 жыл бұрын

Best Explanation that i ever seen about DNS👏..Thank You

@davidbombal 4 жыл бұрын

Thank you

@tanvir1113 9 ай бұрын

Your content is very good and informative. Thank you so much.

@akhilowle1 2 жыл бұрын

Thank you very much for the course. Pro David

@islamtoghuj 3 жыл бұрын

Greetings from the North Caucasus. Thank you very much for your eloquent tutorials.

@EmpreVision 4 жыл бұрын

Thanks for sharing this valuable information. Everyday we learn more from you

@davidbombal 4 жыл бұрын

Thank you. Glad you learned something :)

@hennessy6996 4 жыл бұрын

Got more than I bargained for, thanks for building the content.

@davidbombal 4 жыл бұрын

Really happy to hear that Big Ric.

@mrkewi1 Жыл бұрын

Thanks again for another great video David

@ThePumbaadk 4 жыл бұрын

Thanks David, your videos has always great details, although I know the topic 😃

@davidbombal 4 жыл бұрын

Thank you Søren! Appreciate the support 😀

@hugodelaolla499 2 жыл бұрын

Great Video helped me solve many doubts.

@uzeirdalip9499 Жыл бұрын

Excellent explanation, thank you!

@patriciamarch5872 Жыл бұрын

Yesss, continue with it!

@gtarada 4 жыл бұрын

Thank you David! Great!

@davidbombal 4 жыл бұрын

Thank you

@venkateshkulkarni4557 4 жыл бұрын

You can teach and clear concepts really good waiting for you ccnp r and s labs .

@davidbombal 4 жыл бұрын

Thank you!

@NetworkChuck 4 жыл бұрын

Should we go to SXSW, David??? ;)

@davidbombal 4 жыл бұрын

lol... not until I have reached my goals!

@foodsforgoodhealth 4 жыл бұрын

Hey NetworkChuck, thank you for your videos too...

@gbadri1 3 жыл бұрын

@@davidbombal what is your goals??

@jewelbennett7325 3 жыл бұрын

Scam site illegal.

@AlecegonceTV 3 жыл бұрын

@@gbadri1 Well, if David watches Network Chuck, he is doing nothing. absolutely nothing :)

@steven.cutright 4 ай бұрын

Your an excellent orator bro.. ty

@orleydoss3171 4 жыл бұрын

Great tutorial/explanation! 👍

@davidbombal 4 жыл бұрын

Thank you Orley

@user-vg3jh7lg6o 2 жыл бұрын

Thank you David that was good)

@joydeephalder3123 3 жыл бұрын

Thanks for the video , pls tell how do I configure dns server on my router ? Should I use ip name server (server ip address) or if I want to use independent dns server in my network, then how to configure my router? Pls tell @David sir

@charliebrown7328 4 жыл бұрын

Very informative and well explained video 👍👍

@davidbombal 4 жыл бұрын

Thank you

@davidsrinivasan7764 4 жыл бұрын

What are forward and reverse lookup zones ?

@adiflorense1477 3 жыл бұрын

3:37 is it google choose nearest data center to us when we request e.g youtube ?

@lonewolf2547 Жыл бұрын

Amazing video…very indepth

@ganeshg786 4 жыл бұрын

Thanks for the video David.

@davidbombal 4 жыл бұрын

Thank you for the continued support G G

@michaelanderson7902 4 жыл бұрын

Thank you so much David!

@davidbombal 4 жыл бұрын

Thank you for watching Michael

@sreeramlalitha1476 4 жыл бұрын

May I please know why ospf use ttl 1 whereas rip and eigrp use ttl 2.

@amitjha3545 4 жыл бұрын

First of all I wanna thank you for all of your videos you provide a lot of valuable information to us. And I wanna ask a question that for beginner which one is better GNS3 Or EVENG to start for better understanding not for just clear the exam.

@davidbombal 4 жыл бұрын

Thank you. Both are good and both have advantages and disadvantages. However, if you are new to networking, I would suggest you start with Cisco Packet Tracer - free, easy to use.

@ciscocert272 4 жыл бұрын

Yo definitely deserve more promos on this channel 👍

@davidbombal 4 жыл бұрын

Thank you!

@amrendragiant Жыл бұрын

Great Video David. Love from India 🇮🇳

@hardtoFReSh 24 күн бұрын

Dns has so much depth !!!

@yaserbasaad7984 4 жыл бұрын

That's awesome, I won free course " Linux" ohhh Thank you @David Bombal

@davidbombal 4 жыл бұрын

Great! Enjoy Yaser!

@phuocphan7269 4 жыл бұрын

Thanks so much for giveway!

@malcador 3 жыл бұрын

Can I do nslookup with a Google Home too?

@tiagoafonso6064 4 жыл бұрын

Hello David Bombal I just finished my degree in Computer Engineering I am 27 and I want to start my journey on networking industry, where should I start Python or CCNA ? Keep your fantastic work! cheers

@famkabushra7540 2 жыл бұрын

Great video thanks a lot

@jpmbula Жыл бұрын

can you have a proposed solution for the protection of a DNS server?

@tiagonovembre5465 4 жыл бұрын

Hi. David. All your videos are very helpful. Im interested to buy CCNA training you offer above and just wondering if they are same training offered in Udemy and I have it already. Thanks again

@davidbombal 4 жыл бұрын

My CCNA training courses are on Udemy, so if you have purchased the courses there, don't purchase from somewhere else.

@amfurniture9211 4 жыл бұрын

Thank you.. very beautiful 👌 video

@davidbombal 4 жыл бұрын

Thank you Asral

@abdulhaphyz Жыл бұрын

Thank you 👌

@faridtnx 4 жыл бұрын

UDP is used by Dynamic Name Systems as their base of communication

@itsaazim 4 жыл бұрын

Thanks a lot!

@storaman12 Жыл бұрын

Thank you.

@GajendraKarle 4 жыл бұрын

Thank you David for SDN give away

@davidbombal 4 жыл бұрын

I hope you enjoy the course!

@GajendraKarle 4 жыл бұрын

Yep, David I always enjoy your courses. Keep on doing the good work

@AozenDreyar Жыл бұрын

you are amazing

@xanvong1501 3 жыл бұрын

What software do you use to draw the topology ?

@mrkewi1 Жыл бұрын

GNS3

@u_watch9497 Жыл бұрын

Did they end up actually holding SxSW ?

@Mohammed.Khalefa 4 жыл бұрын

thanks for the free courses

@davidbombal 4 жыл бұрын

Enjoy the courses Mohammed. Hope you learn a lot.

@Mohammed.Khalefa 4 жыл бұрын

@@davidbombal Sure , Appreciated

@strgtr3531 4 жыл бұрын

Thank you

@madaraekouta8058 4 жыл бұрын

Please sir May we wait the course about CCNP enterprise ?

@davidbombal 4 жыл бұрын

I am slower than others. First I need to publish CCNA.

@rahulroyricky 4 жыл бұрын

Thanks David ..👍

@davidbombal 4 жыл бұрын

Thank you for watching Rahul

@nemesisshadowlord2026 4 жыл бұрын

Wow David that's cool technology..

@davidbombal 4 жыл бұрын

Thank you Ace. You like the Alexa integration?

@nemesisshadowlord2026 4 жыл бұрын

My computer doesn't talk back to me wish my miss was the same lol David..

@davidbombal 4 жыл бұрын

@@nemesisshadowlord2026 lol... yes... not sure I like it that Alexa is listening all the time however :(

@weedacidegaming199 25 күн бұрын

very funny prize to have at the beginning of 2020

@LARKXHIN 4 жыл бұрын

My first thought at reading the title was "Usually the problem".

@davidbombal 4 жыл бұрын

lol... great comment

@hduman27able 4 жыл бұрын

I give answer but "Invalid Captcha Response." message is coming

@davidbombal 4 жыл бұрын

Are you based in the UK? Unfortunately the main giveaway is only open to UK residents.

@gbadri1 3 жыл бұрын

Great Video David - can we chat soon

@ryanamberger 4 жыл бұрын

The picture at the beginning has bus no. 53, what a coincidence. 🙂

@jewelbennett7325 3 жыл бұрын

Yes

@SuperKap0w 4 жыл бұрын

Ya no laka boet great content!!!!

@davidbombal 4 жыл бұрын

Baie Dankie!

@praasannakumark7527 Жыл бұрын

53 ports we will use for dbs

@Nimitz_oceo 4 жыл бұрын

UK only ?

@davidbombal 4 жыл бұрын

The SXSW giveaway is only open to UK residents unfortunately, but the free courses are open to anyone (but limited numbers).

@jewelbennett7325 3 жыл бұрын

Resolving operatic ulnar domain name to address

@hackcodesfree9200 Жыл бұрын

just ossom

@xenolithis 2 жыл бұрын

brb sending this to FB engineers

@patriciamarch5872 Жыл бұрын

It is DNS!

@nemesisshadowlord2026 4 жыл бұрын

I guess the prize giveaways are good for your viewers..

@davidbombal 4 жыл бұрын

Yes, a lot of people like the courses and I'm sure someone will have a fantastic time at SXSW!

@abdallahahmad1438 3 жыл бұрын

the answer is DNS

@ninjahunter2199 2 ай бұрын

The sponsor video parts don't age very well

@felipica 2 жыл бұрын

bruxaria

@harshadkumar9519 2 жыл бұрын

The answer your question is DNS

@metinkoc 4 жыл бұрын

David, pls note that KZfaq has already have lots of ad before the video. Advertising a sponsor is good for you, however it would make boring to watch the videos 😊

@davidbombal 4 жыл бұрын

Thank you for the feedback Metin.

@tahersadeghi6773 2 жыл бұрын

Hey buddy. You speak faster than what you show in Wireshark. Try to make it concurrent.

@lindamora7 Жыл бұрын

why can't you simplify this?

@BheemSys 3 жыл бұрын

DNS

@SamiUllah-xs3tm 4 жыл бұрын

me being in Asia 😭😭😭

@davidbombal 4 жыл бұрын

Yes... pity that this is only for UK residents 😥 But, did you try to win a free course?

@bobof673 2 жыл бұрын

not for laymen. Too fast for me. I feel like a chameleon on a smartie box. But thank you, i think. I understood the 1st 2 minutes.

@user-gv5qj4bh1x 2 жыл бұрын

do sponsers you need to have more money to give more knowldge to the world

@JarppaGuru Жыл бұрын

its man in middle you pay for

@mariembuenaventura1278 4 жыл бұрын

Please continue sponsored videos and giveaways! Everyone wins if possible just provide the PROS and CONS of the product.

@davidbombal 4 жыл бұрын

Thank you Mariem

@alexandruvasi5877 4 жыл бұрын

AAAA record

@mostafaadel6027 4 жыл бұрын

this is bad i liked your previous videos before the holidays they were useful to the point entertaining and i learn from them or review some information a half an hour video and i watched 6 minutes of nothing sorry but you were better before

@davidbombal 4 жыл бұрын

Sorry to hear that Mostafa. Did you see the menu below the video that shows topics so you can jump to topics of interest? I go deep into the technical content from 8:20