Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
DNSSEC and Bind
Search
Chinmay Pendharkar
May 21, 2014
Technology
1
130
DNSSEC and Bind
Basics of DNS and DNSSEC. Setting up Bind locally.
Chinmay Pendharkar
May 21, 2014
Tweet
Share
More Decks by Chinmay Pendharkar
See All by Chinmay Pendharkar
Audio Fundamentals - Pd
notthetup
0
75
Garageband And Podcasting
notthetup
0
50
Audio Fundamentals - HTML5 Audio
notthetup
0
99
Audio Fundamentals - Oscillators
notthetup
0
48
Audio Fundamentals - Basics
notthetup
0
100
Robots and Pi
notthetup
2
120
Auralization of road vehicles using spectral modeling synthesis
notthetup
0
180
What I’ve learnt about Environmental Sound Design
notthetup
0
210
Audio Editing with Audacity
notthetup
0
55
Other Decks in Technology
See All in Technology
PHPでWebブラウザのレンダリングエンジンを実装する
dip_tech
PRO
0
200
Snowflake Summit 2025全体振り返り / Snowflake Summit 2025 Overall Review
mtpooh
2
400
AWS Summit Japan 2025 Community Stage - App workflow automation by AWS Step Functions
matsuihidetoshi
1
260
データプラットフォーム技術におけるメダリオンアーキテクチャという考え方/DataPlatformWithMedallionArchitecture
smdmts
5
630
なぜ私はいま、ここにいるのか? #もがく中堅デザイナー #プロダクトデザイナー
bengo4com
0
410
rubygem開発で鍛える設計力
joker1007
2
200
Windows 11 で AWS Documentation MCP Server 接続実践/practical-aws-documentation-mcp-server-connection-on-windows-11
emiki
0
960
5min GuardDuty Extended Threat Detection EKS
takakuni
0
140
AIのAIによるAIのための出力評価と改善
chocoyama
2
550
Uniadex__公開版_20250617-AIxIoTビジネス共創ラボ_ツナガルチカラ_.pdf
iotcomjpadmin
0
160
プロダクトエンジニアリング組織への歩み、その現在地 / Our journey to becoming a product engineering organization
hiro_torii
0
130
Node-RED × MCP 勉強会 vol.1
1ftseabass
PRO
0
140
Featured
See All Featured
YesSQL, Process and Tooling at Scale
rocio
173
14k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
Gamification - CAS2011
davidbonilla
81
5.3k
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.4k
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
Bash Introduction
62gerente
614
210k
Unsuck your backbone
ammeep
671
58k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.3k
The Cost Of JavaScript in 2023
addyosmani
51
8.4k
Site-Speed That Sticks
csswizardry
10
660
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
Transcript
DNSSEC + Bind Chinmay Pendharkar
Disclaimer - Crypto Noob! - Developer ==> Please correct me
if I’m wrong!
What shall we talk about? - DNS - DNSSEC
What is DNS? - Domain Name System - Translate URLs
to IP Addresses (and more) www.google.com => 74.125.135.147
Why? Humans like letter addresses (URLs) - www.google.com Computers prefers
numbers - 74.125.135.147
How does it work?
No really... - UDP - User Datagram Protocol (mostly) -
Me - Q: “What’s the IP for www.google.com” - DNS - A: “74.125.135.147”
In Action
Actual Response
Who is this DNS you speak of?
Nameservers!
Iterative query + Caching
Everything is AWESOME! NOT SO FAST!!!
DNS has issues. - No guarantee that you’re talking to
a authentic name server - Me - Q: “What’s the IP for www.google.com” - Evil ISP Server - A: 1.0.0.1
How? Send a request generally in the direction of the
assigned DNS name server. Anyone in between can respond to that query!!
DNS has more issues DNS Responses can be tampered with
in flight. - Me - Q: “What’s the IP for www.google.com” - DNS Nameserver - A: “74.125.135.147” - Evil ISP Server - A: “74.125.135.148”
DNSSEC to the Rescue Domain Name System Security Extensions “provide
origin authentication, authenticated denial of existence, and data integrity”
But how?? “digitally signing records for DNS lookup using public-key
cryptography” “authenticated via a chain of trust” “you trust the root, then use the root to verify the rest of the chain”
None
Example Requesting IP of bursar.university.edu
Setup for Domain owners. - generate own public/private key pair.
- upload public key to registrar, - registrar pushes the keys via secDNS to the zone operator (e.g.: Verisign for .com) - zone operator signs and publishes them in DNS.
What if my registrar/root doesn’t DNSSEC? - DNSSEC Lookaside Validation
- Internet Systems Consortium DLV Registry. - an additional entry point (besides the root zone) to obtain DNSSEC validation information
How can I use this stuff? We need. 1. A
Name server that speaks DNSSEC 2. All clients speak DNSSEC
#2
What can we do? Run our own Name server!
But but but... HTTP Stack -> Local Name server (DNS)
Local Name server Server -> DNS (DNSSEC)
Introducing... BIND - Berkeley Internet Name Domain - Default Name
server software used by many
Get bound? http://www.bind9.net/ Your favourite package manager should have it
apt-get bind9; pacman -S bind9 port install bind9
Configure bind - Linux : http://haller.ws/projects/bind/dnssec/ - OSX: https://gist.github. com/notthetup/5381693
- Win: http://alex.charrett.com/bind-on-windows
What are we doing? - Generate and verify DNSSEC root
key - Generate and verify DLV key - Add the keys into bind configuration - Enable DNSSEC in bind configuration dnssec-enable yes; dnssec-validation yes; dnssec-lookaside "." trust-anchor dlv.isc.org.;
Setup Bind Make sure it only listens to YOU! listen-on
{ 127.0.0.1; }; Run Bind as a Daemon. sudo launchctl load -w /System/Library/LaunchDaemons/org.isc.named.plist
Use Bind Use Bind as your default DNS Server instead.
Now you can haz DNSSEC
Has it worked out? - No noticeable delay in queries.
- No noticeable increase in CPU usage. - Rare domains don’t work (yimg/yahoo WTH??)
Go get your DNS SEC today!