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Oct 08, 2002 6:40 pm re: re: wireless data security
Ken Seefried

> Kapil Raina wrote:
>In general, if the WLAN is setup with the proper supporting architecture (like firewalls), you can have a secure setup. If you are looking for a plug and play secure WLAN, you may have to wait a little longer.

Firewalls are largely irrelevant to WLAN security as the vulnerabilities fall into 2 general categories:

1) Evesdropping on sensitive information, esp possible since the current WEP privacy technology is woefully inadequate.
2) Impersonation of a legitamate user or network element (e.g. AP), as there is no mutual authentication of the actors in a wireless network.

Firewalls don't help either one. Maximal WLAN security best practices dictate the use of a VPN technology over the wireless transport coupled with strong authentication. There are also next generation WLAN security technologies such as PEAP and EAP-TLS that provide substantially improved built in security, but are fairly new and haven't been fully vetted.

Ken Seefried, CISSP

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