ZyXEL N4100 Betriebsanweisung
Appendix D Wireless LANs
N4100 User’s Guide
322
Note: EAP-MD5 cannot be used with Dynamic WEP Key Exchange
For added security, certificate-based authentications (EAP-TLS, EAP-TTLS and
PEAP) use dynamic keys for data encryption. They are often deployed in corporate
environments, but for public deployment, a simple user name and password pair
is more practical. The following table is a comparison of the features of
authentication types.
PEAP) use dynamic keys for data encryption. They are often deployed in corporate
environments, but for public deployment, a simple user name and password pair
is more practical. The following table is a comparison of the features of
authentication types.
WPA and WPA2
Wi-Fi Protected Access (WPA) is a subset of the IEEE 802.11i standard. WPA2
(IEEE 802.11i) is a wireless security standard that defines stronger encryption,
authentication and key management than WPA.
(IEEE 802.11i) is a wireless security standard that defines stronger encryption,
authentication and key management than WPA.
Key differences between WPA or WPA2 and WEP are improved data encryption and
user authentication.
user authentication.
If both an AP and the wireless clients support WPA2 and you have an external
RADIUS server, use WPA2 for stronger data encryption. If you don't have an
external RADIUS server, you should use WPA2-PSK (WPA2-Pre-Shared Key) that
only requires a single (identical) password entered into each access point, wireless
gateway and wireless client. As long as the passwords match, a wireless client will
be granted access to a WLAN.
RADIUS server, use WPA2 for stronger data encryption. If you don't have an
external RADIUS server, you should use WPA2-PSK (WPA2-Pre-Shared Key) that
only requires a single (identical) password entered into each access point, wireless
gateway and wireless client. As long as the passwords match, a wireless client will
be granted access to a WLAN.
If the AP or the wireless clients do not support WPA2, just use WPA or WPA-PSK
depending on whether you have an external RADIUS server or not.
depending on whether you have an external RADIUS server or not.
Select WEP only when the AP and/or wireless clients do not support WPA or WPA2.
WEP is less secure than WPA or WPA2.
WEP is less secure than WPA or WPA2.
Encryption
WPA improves data encryption by using Temporal Key Integrity Protocol (TKIP),
Message Integrity Check (MIC) and IEEE 802.1x. WPA2 also uses TKIP when
Message Integrity Check (MIC) and IEEE 802.1x. WPA2 also uses TKIP when
Table 88 Comparison of EAP Authentication Types
EAP-MD5
EAP-TLS
EAP-TTLS
PEAP
LEAP
Mutual Authentication
No
Yes
Yes
Yes
Yes
Certificate – Client
No
Yes
Optional
Optional
No
Certificate – Server
No
Yes
Yes
Yes
No
Dynamic Key Exchange
No
Yes
Yes
Yes
Yes
Credential Integrity
None
Strong
Strong
Strong
Moderate
Deployment Difficulty
Easy
Hard
Moderate
Moderate
Moderate
Client Identity
Protection
Protection
No
No
Yes
Yes
No