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User Authentication in VPN

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by sudhakaran_c

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1.How user authentication is done in IPSec based Virtual Private Networks(VPNs)?
2.Can CHAP be used for IPSec based VPNs? if yes explain me?

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by dc1

Authentication is usually rule based on credentials and IPSEC does not use CHAP as an authentication method.

by mike_mds

1) In Win2k, IPSec can be used with various PKI implementations as well as Kerberos authentication.

2) No. Windows 2k has something called the Extensible Authentication Protocol, which supports multiple authentication protocols. The one most closely resembling CHAP is EAP-MD5, which uses the same authentication mechanism. Instead of the two systems that are connecting negotiating an authentication protocol during connection establishment, it is deferred until later in the connection. Thetwo systems simply agree to use EAP, then decide the specific protocol later.

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