dargnet-networks

 AP in sniffer mode in Cisco 9800 When a Cisco AP joins a WLC it can work in several modes, one of those being the "sniffer". In this mode, the AP will be passively listening to wireless traffic which can be sent to a device that can capture and analyze this traffic using an application like Wireshark. Setting the AP in Sniffer mode Converting the AP to Sniffer mode On our Cisco 9800 WLC we have to navigate to Configuration->Wireless->Access Points From the list of APs we will select the Access Point we want to be in Sniffer Mode, then in the " General " tab, we will select " Sniffer " and " Update and apply to device ". The AP will then reboot and re-join the WLC after a few minutes Setting parameters in Sniffer mode Once the AP has re-joined, we can verify its current mode. We will also notice that no channel is configured to be "sniffed"  For configuring what channels are going to be sniffed, we have to individually go to each ...

 Analizando las capturas de WPA2 Enterprise con asignación dinámica de VLAN En un post anterior , configurábamos WPA2 Enterprise con PEAP y asignábamos la VLAN de forma dinámica dependiendo de a que grupo pertenecía el usuario, vamos, Role-Based Access Control (RBAC)  Estos son los 4 puntos donde realizamos las capturas:  Autenticación WPA2 Enterprise En un entorno WPA2 Enterprise, la seguridad se basa en el estándar 802.1X para el control de acceso a la red, utilizando el protocolo EAP (Extensible Authentication Protocol). Con PEAP (Protected EAP), se establece un túnel TLS cifrado entre el cliente y el servidor de autenticación (en este caso, Cisco ISE). Dentro de este túnel seguro, se realiza la autenticación real del usuario (generalmente con credenciales como nombre de usuario y contraseña, y en nuestro caso, almacenados en la base de datos interna del Cisco ISE). Los componentes clave son: • Cliente (Suplicante) : El dispositivo que intenta conectarse (en el ejemp...

Hello, in this entry I initially though about explaining and comparing 802.11i roaming versus 802.1X with FT roaming, but then I though it may be more interesting to follow the process as seen from the Cisco 9800 WLC and DNAC, that is where I configured the packet captures, so I´ve been re-arranging the post several times. Also, we can check when the cisco 9800 WLC will show the roam type as 802.11i Slow, 802.11i Fast or 802.11r.  Capturing Packets with Cisco DNA Center (Catalyst Center) This are the steps followed to get the captures on this post: 1.- From any tab on DNA Center, click the search button and type the MAC address you want to capture 2, 3.- Click on it and go to Client 360 4.- Once in Client 360, click on "Intelligent Capture" 5.- In the Intelligent Capture page for the selected device, click on "Run Packet Capture"  6.- A new tab will open, and there you can choose to do a Full Packet Capture or an Onboarding Packet Capture, program the capture or run...