For the strongest security, we recommend the use of EAP-TTLS, EAP-PEAP, or EAP-TLS.
EAP-TTLS, the Best Choice for Secure, Manageable WLAN Access
Not all EAP authentication types are created equal. Unlike other EAP types, EAP-TTLS doesn't force you to make a trade-off between security and ease of management.
EAP-TTLS provides the following benefits.
Completely protects connection credentials from attack
One of the primary benefits of EAP-TTLS is that it provides complete security for users' connection credentials (i.e., user name and password) as they're being authenticated to the network.
With EAP-TTLS, a WLAN user's identity and password-based credentials are tunneled during authentication negotiation, and are therefore not observable in the communications channel. This strong security prevents dictionary attacks, man-in-the-middle attacks, and hijacked connections by wireless eavesdroppers – and protects your network from the havoc an attacker who's connecting with valid credentials can wreak.
EAP-PEAP and EAP-TLS also provides this high level of credential security; LEAP does not. With LEAP, passwords which are short or insufficiently random are vulnerable to dictionary attack.
Supports all password protocols, for compatibility with your existing authentication scheme
A second major benefit of EAP-TTLS is that it supports all major password protocols, including PAP, CHAP, MS-CHAP, MS-CHAP-V2, EAP-MD5Challenge, and EAP-TokenCard.
So, with EAP-TTLS, WLAN users can safely connect – without danger of cryptographic attack on password – using the connection credentials they're accustomed to using. This lets you use consolidate the management of your wired and WLAN users, and allows WLAN users to connect using the credentials they're accustomed to using, simplifying their access process.
Odyssey Server can authenticate WLAN users directly against Windows NT Domains or Windows 2000 Native Domains. It can also forward EAP-TTLS requests to other RADIUS servers, including Funk Software's Steel-Belted Radius, for authentication of WLAN users against non-Windows databases such as token systems or SQL/LDAP.
Neither EAP-TLS, EAP-PEAP, nor LEAP offers this level of compatibility with existing authentication schemes.
Does not require the use of client certificates
A third major benefit of using EAP-TTLS is that – unlike EAP-TLS – it does not require the use of client certificates to provide strong credential security.
EAP-TTLS and EAP-TLS are similar in that both use TLS (Transport Layer Security, the successor to SSL) as the underlying strong cryptography. However, EAP-TTLS differs in that only the RADIUS servers, not the users, are required to have certificates. The user is authenticated to the network using ordinary password-based credentials, whose use is made proof against active and passive attack by enclosing it in the TLS security wrapper.
Users of EAP-TTLS are, therefore, spared the administrative burden associated with setting up and maintaining a certificate infrastructure. Because EAP-TLS requires that each user have a certificate, organizations that deploy it can look forward to a substantial administrative burden in operating a certificate authority to distribute, revoke, and otherwise manage user certificates.
While EAP-TLS provides strong security and is appropriate for organizations which have already deployed a PKI infrastructure, EAP-TTLS provides equally strong security and requires little additional administration beyond what you're already doing to administer your Windows users.
Provides data security, plus strong mutual authentication of client and server
Beyond its strong credential security and ease of management, EAP-TTLS provides additional security techniques to further protect the security of a WLAN user's connection.
With EAP-TTLS, dynamic per-session keys are generated to encrypt the wireless connection and protect data privacy. Odyssey Server can be configured to re-authenticate and thus re-key at any interval; frequent re-keying thwarts known attacks against the encryption method used in wireless communications (WEP).
In addition, EAP-TTLS provides strong mutual authentication of Client and Odyssey Server, preventing an intrusion onto the network by an unauthorized user, and ensuring that the client is connecting to the right server.
EAP-PEAP, EAP-TLS, and LEAP also provide these safeguards.
With its strong security and compatibility with existing authentication databases and infrastructure, EAP-TTLS puts secure WLAN authentication within any organization's reach.
Authenticates against Windows, or Forwards to Other Authentication Systems
Odyssey can safely authenticate WLAN users directly against your existing Windows 2000 Native Domain or NT Domain authentication database, and includes full support for user and group designations.
And, for seamless integration into networks which aren't exclusively Windows-based, Odyssey can also forward EAP-TTLS authentication requests to other RADIUS servers, including Funk Software's Steel-Belted Radius, for safe authentication against non-Windows authentication schemes. |