Why does the Aruba Instant On Portal / App randomly shows incorrect OS for Wi-Fi clients

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Why does the Aruba Instant On Portal / App randomly shows incorrect OS for Wi-Fi clients

Clients TabClients Tab

  • Below is the random capture of a HTTP traffic initiated by an Android Client that is classified as a Linux Client.
  • The User-Agent has the OS info in the User-Agent –> Mozilla/5.0 (Linux; Android 9; ONEPLUS A5000 Build/PKQ1.180716.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36

 2 Android.JPG 

  • Though the User-Agent has the OS information as Android, the AP has set the OS for that client as Linux.
  • The above is because, a client device initiates multiple HTTP traffic through various applications.
  • The first HTTP packet, that was processed by the AP had the User-Agent value set to - Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.32 Safari/537.36
  • The AP hence processes the User-Agent field only on the first HTTP packet. Once the OS is classified for the client, the User-Agent field will not be processed on the following HTTP packets.

 2.1 Linux.jpg

  • If a client entry is removed from the AP and the client connects again to the Wi-Fi, the chances for that client to send the appropriate OS information in the User-Agent Field is very high.
  • The AP will then re-classify the client’s OS accordingly and update the Client’s tab with the appropriate OS information for the corresponding clients.
  • This feature is hence completely based on the client's behavior.
Regards,
Krishna Prasad
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