Wi-Fi Devices Identified by Wireshark DHCP
DHCP Process Reveals Device Types
Using Wireshark to analyze the DHCP process between devices and a Wi-Fi router DHCP server, it is possible to identify the types of devices connected to the network.
Different Device Identifications
For instance, "MSFT 5 0" is a Windows computer, "dhcpcd-5 5 6" is an Android device, and "ESP32" is a series of low-cost, low-power microcontrollers.
DHCP Option 128160
When a device connects to a network, it sends a DHCP Discover message to obtain an IP address. In the DHCP process, Windows 10 devices include the DHCP option 128160, which can sometimes cause Wi-Fi connection issues. To resolve this issue, Windows should omit this option in its DHCP Discover and Request messages.
Network Access Control Profiles
Additionally, the DHCP process can reveal whether a wireless controller supports Network Access Control (NAC) profiles. These profiles enable the enforcement of security policies for network access.
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