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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Free or Trial Network Software:
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Solar-PuTTY: http://bit.ly/SolarPutty
SolarWinds TFTP Server: http://bit.ly/2mbtD6j
WAN Killer: http://bit.ly/wankiller
Engineers Toolset: http://bit.ly/gns3toolset
IP Address Scanner: http://bit.ly/swipscan
Network Device Scanner: http://bit.ly/swnetscan
Wifi Heat Map: http://bit.ly/wifiheat
Wifi Analyzer: http://bit.ly/swwifianalyzer
SolarWinds NPM: http://bit.ly/getnpm

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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
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!

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#dns #sxsw #wireshark

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