onwebkillo.blogg.se - View roku mac address

#VIEW ROKU MAC ADDRESS SERIES#

When a Meraki AP is containing a rogue SSID, it uses three frame types: In order to protect your corporate infrastructure from rogue access points, Air Marshal uses a technique called “containment”. How can Air Marshal protect against rogue access points? Note : If you have wireless APs that advertise SSIDs and form part of your legitimate corporate infrastructure, then you can prevent Air Marshal from containing them by whitelisting them: So, we can assume that this is a threat to the corporate infrastructure that needs to be mitigated! With this information in hand, we can safely say that this access point is connected to the same wired infrastructure as the Meraki access points and that it is actively advertising at least one SSID. This comparison is achieved by applying an XOR to the MAC addresses in binary form, as shown below in a rogue access point: If the wired MAC and the broadcast BSSID MAC match on the 3rd and 4th bytes of the MAC address (typically wired and wireless MAC addresses are contiguous), and the rest of the bytes differ by 5 bits or less, then the AP is classified as rogue. This is done by simply listening to the broadcast frames that the access point already receives.

In order to classify an SSID as rogue, we also need to look at the MAC addresses of frames on the wired side of the corporate APs. However, older APs without a dedicated listening radio can also be configured to utilize their access radios at specific times to scan for rogue access points, as shown below:Īir Marshal listens for 802.11 beacon frames sent out by APs that are “visible” to the corporate APs, then all the BSSIDs (advertising MAC address of the SSID) that the access point sees are categorized as either “Rogue SSID” or “Other SSID”. In order to identify a rogue AP, all currently available Meraki access points leverage their dedicated “listening” radio to continuously monitor the RF. So, it’s very clear that rogue access points are something we need to protect our business critical WLAN and networks from! What makes a rogue access point rogue?Ĭisco Meraki defines a rogue access point as an AP that is both “seen” on the LAN and is broadcasting SSIDs that are visible to the APs that make up the corporate wireless infrastructure. This is by no means an extensive list of threat vectors introduced by this potentially innocuous action.

Inappropriate location – the AP could be placed close to the perimeter of a building, meaning that someone could listen in on the company’s network.

Inappropriate attachment – the user could also physically attach the AP to a network port in a secure area of the network, or in an area without appropriate firewalling between it and sensitive information.

Or even worse, be purposefully configured with open association and authentication.

Insecure wireless standards – the rogue AP might only support a deprecated and insecure encryption standard, such as WEP.

This act introduces multiple threat vectors to the company, such as: This could arise if an employee or student naively brought in a home WiFi-enabled router and connected it to the company’s infrastructure to provide wireless network access. What is a Rogue Access Point?Ī rogue access point is an AP that is connected to a company’s physical network infrastructure but is not under that company’s administrative control. This blog post shows how Air Marshal protects against one such threat, namely a rogue access point.

A Wireless Intrusion Prevention System (WIPS), such as Cisco Meraki Air Marshal, gives companies the ability to ensure they are protected against threats to these WLANs. Wireless LANs are widely critical to the way companies work and are used to transact sensitive data (e.g.

#VIEW ROKU MAC ADDRESS SERIES#

This is the second in a series of blog posts that focus on wireless security and technology at Cisco Meraki. Don’t leave WIPS to the will of the force… Introduction