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

Fasthosts Techie Test competition is now closed! Learn more about Fasthosts here: https://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.

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Giveaways:
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SXSW Trip: https://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

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Menu:
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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

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CCNA content:
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Free CCNA content:    • Packet Tracer: CCNA Exam labs  

CCNA course: http://bit.ly/2PmTVPD


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Dnsmasq setup:
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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


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