A7-P2 Brendyn Hitt

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Bellevue University *

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CIS311

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Information Systems

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Oct 30, 2023

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The Development of a Wireless Network Site Survey
The Development of a Wireless Network Site Survey Brendyn Hitt Bellevue University Professor Nyburg CIS311-T302 Network Security 10/15/2023
What is a Wireless Network Site Survey? • A wireless network site survey is an inspection that is physically performed prior to the installation of a radio frequency (RF) network. • Purposes of this inspection are to determine: • Wireless coverage • Quality of service • Network capacity • Data rates • Capability of roaming access
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Why are Wireless Site Surveys necessary? • Wireless Interference • RF Spillage • Incomplete site coverage • Accurate resource count
What should a site survey accomplish? • Identify areas of interference • Identify hardware needed for coverage • Identify # of access points needed • Identify # of antennae needed • Identify type of antenna and access points needed
Site Surveying Checklist 6 • Accommodation for specialty equipment. (scaffolding, manlift, scissor lift, etc.) • Necessary throughput to use • Characteristics of site (Thick or thin walls, multiple floors, open floor plan, etc.) • # of users • Type of devices being used • Applications/software being used on devices
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• Floor layout blueprint • Site Survey plan • Access to breaker box (if necessary) • Access Points • Antennas • Mounting Hardware 7 • Test Software • Access to on-site device • Power Source • Camera to assess potential issues Tools for Wireless Site Surveys
Popular Site Surveying Methods Predictive Survey • Survey is completed before site is occupied. • Helpful to determine optimal placement of Access Points. Passive Survey • Gain info on all surrounding signals. • Determine wireless frequencies that may cause interference. Active Survey • Survey takes place during active network use • Measures access points, overall throughput, and packet loss occurring throughout the site 8
Considerations of Site Surveying • What is the network being designed for? • Coverage • Capacity • What is the use case of the Network? • How many devices? • What are these devices doing? • What would be the best cabling path? • Will the use of legacy devices (Wi-fi 4 or older) be needed? 9
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Site Survey Scenario • You are a network engineer for a small hotel chain that has been recently acquired by a much larger hotel company. • The parent company wants to upgrade the facilities in your hotel chain to include: • Replacing the existing wireless LANS to assist mobile hotel administration • To provide guests with a more secure wireless Internet connection. 10
Step 1: Assess floor plan • Assess the current floor plan • In this case, networks will be created for both hotel guests and hotel employees • Use the floor plan to determine areas of need for coverage. • Take different architectural design into account. (Walls, ceilings, elevators, doors, etc.) Silver 11
Step 2: Locate Existing Access Points 12 • To provide guests with a more secure experience, access points will be updated to Wi-Fi 6. • A dual band network option will be provided to guests. • WPA3 will be available on 2.4GHz networks for VIP guests who require encryption of their data for business needs. • WPA2 on 5GHz networks will be provided complimentarily. • Speeds will be increased on devices compatible with Wi-Fi 6. • Due to increased coverage of Wi-Fi 6, a new AP configuration may be needed.
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Step 3: Test Current Network Coverage 13 • Create a route in which you will walk the floor plan • Keep note of signal strength as you are traversing the site • Look for dead zones, weak areas, and areas of high traffic
Click to edit master text style Click to insert image here • After determining the capabilities of the AP configuration, add, move, or remove points to increase coverage, and decrease possible interference or RF spillage. • Continue testing and moving APs until all devices have full connection. Step 4: Install/update APs based on current testing
Click to edit master text style • Plan to test this network on a normal work-day. • Compare results • Further configuration may be neccesary Step 5: Schedule testing under normal traffic
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How will this network be more secure? 16 • An example of how Wi-Fi 6 will increase security is through a "Dragonfly Handshake" • As opposed to a four-way handshake, a dragonfly handshake can be implemented to prevent an offline dictionary attack. • ODAs implement a password generator to bypass WPA2 network passwords • The enhanced security of WPA3 prevents this.
What are monitoring tools? 17 • Wireless Intrusion Detection and Prevention System • These monitor and sample network traffic to identify WLAN attacks • Dedicated WIDPS • Fixed WIDPS • Mobile WIDPS
Addressing dictionary attack risks — MIT Kerberos Documentation . (n.d.). https://web.mit.edu/kerberos/krb5-latest/doc/admin/dictionary.html#:~:text=An%20offline%20dictionary%20attack%20is,faster%20than%20an%20online%20attack . Dragonblood: Analysing WPA3’s Dragonfly handshake . (n.d.). https://wpa3.mathyvanhoef.com/ Souppaya, M. P., & Scarfone, K. A. (2012). Guidelines for securing wireless local area networks (WLANs) . National Institute of Standards and Technology. IEEE 802.11ax: The sixth generation of WI-fi white paper . (2022, January 23). Cisco. https://www.cisco.com/c/en/us/products/collateral/wireless/white-paper-c11-740788.html IEEE 802.11ax: The sixth generation of WI-fi white paper . (2022, January 23). Cisco. https://www.cisco.com/c/en/us/products/collateral/wireless/white-paper-c11-740788.html References
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