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Profile Editor Wizard 4 - 5
Table 4-4 lists the PEAP tunneled authentication options.
Table 4-5 lists the TTLS tunneled authentication options.
Table 4-4
PEAP Tunneled Authentication Options
PEAP Tunneled
Authentication
Description
MS CHAP v2 Microsoft Challenge Handshake Authentication Protocol version 2 (MS CHAP v2) is a
password-based, challenge-response, mutual authentication protocol that uses the
industry-standard Message Digest 4 (MD4) and Data Encryption Standard (DES) algorithms
to encrypt responses. The authenticating server challenges the access client and the access
client challenges the authenticating server. If either challenge is not correctly answered, the
connection is rejected. MS CHAP v2 was originally designed by Microsoft as a PPP
authentication protocol to provide better protection for dial-up and virtual private network
(VPN) connections. With Windows XP SP1, Windows XP SP2, Windows Server 2003, and
Windows 2000 SP4, MS CHAP v2 is also an EAP type.
TLS EAP TLS is used during phase 2 of the authentication process. This method uses a user
certificate to authenticate.
EAP-GTC EAP-GTC is used during phase 2 of the authentication process. This method uses a
time-synchronized hardware or software token generator, often in conjunction with a user PIN,
to create a one-time password.
Table 4-5
TTLS Tunneled Authentication Options
TTLS Tunneled
Authentication
Description
CHAP Challenge Handshake Authentication Protocol (CHAP) is one of the two main
authentication protocols used to verify the user name and password for PPP Internet
connections. CHAP is more secure than PAP because it performs a three way handshake
during the initial link establishment between the home and remote machines. It can also
repeat the authentication anytime after the link is established.
MS CHAP Microsoft Challenge Handshake Authentication Protocol (MS CHAP) is an
implementation of the CHAP protocol that Microsoft created to authenticate remote
Windows workstations. MS CHAP is identical to CHAP, except that MS CHAP is based
on the encryption and hashing algorithms used by Windows networks, and the MS CHAP
response to a challenge is in a format optimized for compatibility with Windows operating
systems.
MS CHAP v2 MS CHAP v2 is a password based, challenge response, mutual authentication protocol
that uses the industry standard Message Digest 4 (MD4) and Data Encryption Standard
(DES) algorithms to encrypt responses. The authenticating server challenges the access
client and the access client challenges the authenticating server. If either challenge is not
correctly answered, the connection is rejected. MS CHAP v2 was originally designed by
Microsoft as a PPP authentication protocol to provide better protection for dial-up and
virtual private network (VPN) connections. With Windows XP SP1, Windows XP SP2,
Windows Server 2003, and Windows 2000 SP4, MS CHAP v2 is also an EAP type.
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