SLIDE 1
create your own e
Create your own dynDNS-service
Leonhard Kunz, Daniel Ocando
1
Motjvatjon
- Why dynamic DNS?
Access to devices without a non-changing (statjc) IP
- ver the Internet
2
Create your own dynDNS-service 1 Motjvatjon Why dynamic DNS? - - PowerPoint PPT Presentation
Create your own dynDNS-service 1 Motjvatjon Why dynamic DNS? - - PowerPoint PPT Presentation
create your own e Leonhard Kunz, Daniel Ocando Create your own dynDNS-service 1 Motjvatjon Why dynamic DNS? Access to devices without a non-changing (statjc) IP over the Internet 2 Motjvatjon Access to their private home network
SLIDE 2
SLIDE 3
Motjvatjon
- Access to their private home network
- “Tech-savvy” people ofgering services from home
network
- e.g. ofg-site backup
3
SLIDE 4
Lecture Overview
- 1. Short introductjon to DNS-servers
- 2. The concept of dynamic DNS
- 3. Tools used in the lab
3.1 Bind DNS server 3.2 Apache HTTP server
- 4. Teaser: Practjcal Part.
- 5. Summary/Learning Goals
4
SLIDE 5
Introductjon to DNS
5
- What is DNS?
DNS is used to resolve Symbolic names (easy to remember by humans) into technical data/addresses
Based on work by Sylvain Leroux, CC BY-SA 3.0
SLIDE 6
Introductjon to DNS
6
- When do we use the DNS?
fjles?
Browser Machine DNS server Web server
1.IPv6 address for the domain “exampe.com”?
- 2. IPv6 address: 2001:db8:cafe::ffff:1
- 3. Request webpage using IPv6
- 4. Here's: “example.com”
SLIDE 7
Introductjon to DNS
7
- What are zones and zone fjles?
A zone is a certain portjon within the global DNS that is managed by a single entjty A zone fjle is a (text) fjle that describes a DNS zone
SLIDE 8
The concept of dynDNS
8
- What is the principle behind dynamic DNS?
SLIDE 9
The concept of dynDNS
9
- How does dynDNS map the IP address to a
domain?
SLIDE 10
Tools used in the lab
10
- What tools will you use in the lab?
SLIDE 11
BIND DNS server
11
Why use BIND?
- Reliably fulfjlls existjng DNS standards
- Considered the standard DNS-server on
*nix operatjng systems
- Able to do recursion
SLIDE 12
Apache HTTP server
12
Why use Apache?
- Most widely used web server
- Can execute scripts that simulate the dyn
API
Apache feather logo – Apache Software Foundation
SLIDE 13
Teaser Practjcal Part
13
Home network “Mobile” device Yoor domain
(DNS- and webserver)
SLIDE 14
Summary/ Learning Goals
14 The Following Learning Goals are Covered in the Lecture PreLab Lab Understand how dynDNS works X X Confjgure bind to do dynDNS X Get a basic grip on DNS X X Examine security aspects X X Confjgure a somewhat complex scenario X
SLIDE 15
create your own exercise
EVIL TWINS WIFI SSID SPOOFING & MORE
Janosch Maier & Christoph Schmidt
1
SLIDE 16
Motivation
Attacking a WLAN is really easy!
- What could happen, e.g. at Starbucks?
2
SLIDE 17
Lecture Summary
- WLAN Basics
– Spoofing SSIDs – Creating an Evil Twin
- Think of Countermeasures
3
SLIDE 18
Different APs, same SSID?
- Some WLAN basics (whiteboard)
– BSS, BSSID, (E)SSID, ESS
- We will use special wifi drivers
– Boot a special kernel (see lab instructions) – Unlocks channels and signal strength
- Please adhere to German laws
4
SLIDE 19
Countermeasures?
Ideas?
5
SLIDE 20
Evil Twin at work
6 6 Wifi AP (PC 1) Evil Twin Image Evil Twin (PC 4) Evil Twin Image Unsuspicious User (PC 6) Normal Image Attacker (PC 3) Evil Twin Image
SLIDE 21
Summary/ Learning Goals
7
The Following Learning Goals are Covered in the Lecture PreLab Lab Get to know SSID spoofing X X Understand how evil twins work X X Spoof specific SSIDs X X Create an evil twin X X Reroute web traffic (iptables) X X Develop counter measures X