EAP was supposed to head off proprietary authentication systems and let everything from passwords to challenge-response tokens and public-key infrastructure certificates all work smoothly with PPP.
With standardized EAP, interoperability and compatibility of authentication methods became simpler. For example, when you dialed into a remote-access server RAS that used EAP for security, the RAS didn't need to know any of the details about the authentication system; it just had to coordinate things between you and the authentication server.
This brings us to IEEE As the name implies, this is a standard for passing EAP over a wired or wireless local area network. With It's authentication and nothing more. You can also use One of the key benefits of This makes You might want to skip to page 12 where the detailed information begins. Authentication means making sure that something is what it claims to be. The purpose of It is a security protocol that works with In a wireless network, In order to connect to the access point, a wireless client must first be authenticated using WPA.
In a wired network, switches use Before a switch forwards packets through a port, the attached devices must be authenticated. After the end user logs off, the virtual port being using is changed back to the unauthorized state. The original 2. As with modems, newer standards can fall back to this standard under difficult conditions or if in contact with an older interface.
There were two variants, frequency hopping and direct sequence , but these were for political rather than technical reasons. Same speed as The standard is fixed, but regional implementations in Europe are still under discussion. Although not quite as good as Wireless hotspots, domestic wireless broadband gateways and company WLANs nearly all support Modified The reassociation process is similar to the association process, except that when roaming is involved, the new and old access points communicate on the wired network to move wireless client information between each other.
When the wireless client roams to a new access point, the reassociation process is used to inform the The wireless client issues a reassociation frame to the new access point, which identifies the old access point. The new access point communicates with the old access point over the wired link to verify that the wireless client was previously associated. If the wireless client was previously associated, the new access point issues a reassociation response frame to the wireless client; otherwise, it issues a disassociation frame.
After sending the reassociation response, the new access point contacts the old access point over the wired link to complete the reassociation process. Any buffered frames at the old access point are transferred to the new access point. After completing the reassociation process, the new access point begins processing frames from the wireless client.
As previously stated, there are two Home users who need to join their enterprise networks using access points that are not configured for Another frame type related to authentication frames is the deauthentication frame.
When a deauthentication frame is received by a wireless LAN client, the client is disconnected from the access point. This might cause a wireless LAN client to go through the entire probe request process again or cause the client to restart the authentication association process again. Deauthentication frames can be sent to the broadcast MAC address. Security should be considered a network design component that needs to be integrated and not something that is added later.
Enterprise security discussions consistently indicate that the wireless LAN's RF signals typically travel beyond the deployed building's perimeter. This allows the network to be monitored and attacked from beyond the property line. However, the range for this type of attack is very limited.
To make any attack feasible an attacker with the appropriate skills needs to be in physical proximity to a wireless LAN. This requires the attacker to roam extensive areas looking for a suitable wireless LAN.
The location of an enterprise, and the type of business operated by that enterprise, will determine any recommended augmentation of the native wireless LAN security. Hostile activities are equally applicable to all networks and can be broadly broken down into:. The choice of EAP type used in authentication and the configuration of the supplicant can determine whether username information is exposed during authentication.
This is generally addressed in two ways:. This type of security needs to be assessed with a understanding of the end node's mobility.
This attack typically uses The two core standards introduced in secure wireless LAN deployment are the The IEEE owns the The original These amendments have added different physical layer implementations, provided greater bit rates The IEEE also owns the The advantage of EAP is that it decouples the authentication protocol from its transport mechanism. EAP can be carried in See the "EAP" section. In wired networks it is common for devices to be from the same vendor where integration is part of product testing.
When different vendor devices are combined into the same network, interoperability and integration must be managed and controlled by a group of network specialists who understand the devices and their interaction. In wireless networks that include devices from many vendors, the wireless standards allowed different interpretations and optional features to be developed. A group of industry companies and organizations formed the Wi-Fi Alliance www.
The WPA standard was developed to address the weakness in the WEP encryption process prior to the ratification of the One of the key development goals was to make it backward compatible with WEP hardware.
0コメント