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: https://www.youtube.com/playlist?list=PLhfrWIlLOoKM3niunUBTLjOR4gMt_uR_a
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
DNS
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