19. Securing Wireless Networks.pdf

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Securing Wireless

Networks

Security Fundamentals

Instructor: Don Jones

Securing Wireless Networks

Security Fundamentals

In This Lesson:

 SSIDs

 Keys

 MAC Filters

 Pros and Cons

Securing Wireless Networks

Security Fundamentals

Why Wireless?

• Wireless networks continue to become more popular and

prevalent.

• They’re an attacker’s dream come true – data transmitted over

the air is easy to intercept.

• Securing these networks has become extremely important.

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Securing Wireless Networks

Security Fundamentals

SSIDs

• The Service Set Identifier (SSID) identifies a wireless network

and advertises its presence.

• Wireless access points can be configured to not broadcast an

SSID, which helps to hide the network but only from casual

attacks.

• Serious attackers can detect the network transmissions without

the SSID.

Securing Wireless Networks

Security Fundamentals

Keys

• The best way to defend a wireless network is to encrypt the

traffic being transmitted.

• WEP: Wired Equivalency Privacy

• WPA and WPA2: Wi-Fi Protected Access

– Shared-key

– 802.1X

Securing Wireless Networks

Security Fundamentals

MAC Filters

• These tell a wireless network’s hardware to only accept

connections from authorized MAC addresses.

• MAC addresses are encoded into a wireless network transceiver

at the factory.

• Enterprise-class wireless hardware can often draw from a

centrally managed list of authorized MAC addresses.

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Securing Wireless Networks

Security Fundamentals

Pros and Cons

• WEP: Not very secure – easily cracked.

• WPA/WPA2: Secure, relatively easy to set up and manage.

• MAC filtering: Secure, but challenging in large or dynamic

environments.

• SSID silencing: Not secure, but provides an illusion of security.

Securing Wireless Networks

Security Fundamentals

What We Covered

 SSIDs

 Keys

 MAC Filters

 Pros and Cons



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

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Plik z chomika:

Inne pliki z tego folderu:

01. Getting Started with Security Fundamentals.pdf (242 KB)
03. Physical Security as the First Line of Defense.pdf (201 KB)
02. Introducing Security.pdf (209 KB)
05. Authentication Basics.pdf (281 KB)
07. Using Encryption to Protect Data.pdf (233 KB)

Inne foldery tego chomika:

MP3

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