Confused with security options

We will implement a WLC 4402 and lightweight APs on our network. Our network is the basis with windows servers and windows XP clients. The wireless network will serve as our users of local resources and clients to access a broadband service for which we put in place a different SSID and VLAN. I'm uncomfortable with the WLC and AP deployment. For guest access, I researched the option guest WLC page / authentication of the connection.

For our local users, I'm really confused about all the security and authentication options. I know that the options are: WPA, WEP, GANYMEDE, MAC address, PKI, 802.11, layer 1, Layer 2, Layer 3, TKIP, EAP, RADIUS, but I'm really confused which to use for our local users and how to configure the right option. Our security needs are not so big that we spend not secrets from the Government, but I know that WEP is not an option for us. I would be very happy if someone can point me in the direction of understanding security options and who better to our needs.

Thank you

Jeff

For security link, if all your clients supports, use WPA (WPA2 if possible) with AES encryption.

If some customers are in charge of the ESAS, it is possible to offer also TKIP.

For authentication of the client, as usual, it boils down to what resources (human and treatment) are available, budget and administrative pain (coupled the number of users how dynamic tends to be).

If you have a small number of employees / hosts / devices and they tend to not be a group of high turnover, the shared key ("WPA - PSK" or "WPA-Personal") works well. It is strongly recommended to use a long enough key and complex (just enter it once during the configuration of each client).

If your group changes, and / or a larger group, then consider using authentication 'Enterprise', such as PEAP, LEAP or EAP-FAST, which may be related to your domain server / Microsoft authentication information by was to a RADIUS server (as Microsoft IAS, which you probably already available).

Almost, rule out completely (useless, easily defeated) MAC filtering, no to the SSID broadcast (useless, no security impact, does create problems with many MS Windows clients) and using static WEP.

GANYMEDE + is very good for authentication, but might be overkill for your scenario. Cisco ACS and GANYMEDE + offer a lot of options, but if you do not need all the options, then it is just more difficult.

It becomes easier when you remember that the link security and encryption (WPA, WPA2) are distinct from the user authentication (802.1 x sent through userlist, RADIUS, GANYMEDE + through EAP methods).

Planet3 to CWNA book published by Osborne is an excellent reference and training guide and covers most (and more) about how all this fits together and common / best practices implementations.

Good luck

Scott

Tags: Cisco Wireless

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