ISDN Dial-in user authentication witch certificate

[a.hed]

Hi, I would like to authenticat users that dial in with use of certifcate.

how can this be done. I have Cisco router (in lab 1720) with ISDN BRI and dial-in user are XP-client the user is autenticated against radious (this is working fine with users in AD. now I want to use certificate.

[m.singer]

vpn clients can be used on the XP-client to authenticate using digital certificates. see the following link for more information :

http://www.cisco.com/en/US/products/sw/secursw/ps2308/products_user_guide_chapter09186a00800bd981.html