networking

2. MUJAHID RANA
Bs IT 6th semester
Roll No 1173008
Presentation Topic : wireless security

3. TOPICS
 Introduction to wireless
 Wireless security
 Issues
 WEP security (Wired Equivalent Privacy)
 WAP security (Wi-Fi Protected Access)
 How we secure the home wireless network

4. I N T RO D U C T I O N T O W I R L E S S N E T WO R K S
 Wireless networks are computer networks that are not connected
by cables
 Medium is Air
 Less Cost
 Wireless devices work in Bluetooth, printer LAN, MAN, WAN
 No need dial up phone , space , wire

5. WIRELESS SECURITY
 Wireless technology has become very popular in recent years,
The convenience of wireless networks has changed how people use computers,
TV's and video games, but it has also created new security concerns and challenges.
 Wireless radio frequency signals broadcast through the open air, making your
network visible to anyone using a wireless capable device within range. Without
security on your network, it is open to anyone who can "see" your network.
 If someone you don't know is using your connection, they could be using it to
download content that is illegal (such as music or movies).

6. SECURITY ISSUES
 End user are not security experts, and may not be aware of the risks
posed by wireless LANs
 Nearly all of the access points running with default configuration have
not activated WEP
 Most of the users does not change access points' default key used by
all the vendor’s products Like user (admin) pasw (admin)
 The Wireless Access Points who are enable with WEP can be cracked
easily

7. WEP SECURITY
 Wired Equivalent Privacy (or Wireless Encryption Protocol), WEP is part of the
IEEE 802.11 wireless
 WEP is used at the two lowest layers of the OSI model - the data link and
physical layers; it therefore does not offer end-to-end security.
 WEP's major weakness is its use of static encryption keys
 When you set up a router with a WEP encryption key, that one key is used by
every device on your network to encrypt every packet that's transmitted
 Do not secure as a long time easily crack wep security

8. allow to create 4 static keys

9. WPA SECURITY
 Improved data encryption through the temporal key integrity protocol (TKIP).
TKIP scrambles the keys using a hashing algorithm and, by adding an integrity-
checking feature, ensures that the keys haven't been tampered
 WPA major advantage is its use of dynamic encryption keys
 If a device is not configured for WPA, it will usually fall back to the lesser WEP
encryption scheme
 User authentication, which is generally missing in WEP, through the extensible
authentication protocol (EAP). WEP regulates access to a wireless network based
on a computer's hardware-specific MAC address

11. HOW WE SECURE THE
HOME WIRELESS NETWORK
 Select the wireless security method of either WEP or WPA (we
suggest WPA
 Enter the passphrase to generate the keys. After enabling security
on the router, any wireless device that wants to connect must have the
key in order to connect to your network.

12. CHANGE DEFAULT ROUTER
PASSWORD
 Make sure the router password is not still set to the default
password.
 If the password can be guessed this could give someone access to
the router setup, which could allow them to change your router
settings, including viewing any security keys.
 The most of the device user and password is admin

14. D I S A B L E S S I D B ROA D C A S T
 To help make finding your wireless network easier wireless
routers broadcast your SSID, which means anyone looking for a
wireless router could see your SSID.
 To help make it more difficult for someone to find your network when
browsing for a wireless network you can disable the
 SSID broadcast feature. However, when disabling the SSID broadcast
it will require that you manually enter your unique SSID when wanting
to connect any new device to your network.

16. E N A B L E W I R E L E S S M AC F I LT E R
 The Wireless MAC filter feature only allows a wireless device to
connect to your router if the MAC Address has been entered into
the filter list.
 This can make connecting new devices to your network more
difficult, but improves the overall security of your wireless
network.

18. CHANGE THE SSID NAME
AND PASSWORD
 Change the SSID (Service Set Identifier ) Name Because it
Uniquely identify the Network
 Like PTCL devices all the devices default name is PTCL-PP
 Change the default key which help to protect your network I am
prefer to also make time
 The default password 12345678