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[Bug-gnu-radius] Two-Factor Authentication support in GNU RADIUS server


From: Rajeesh Ramanathan
Subject: [Bug-gnu-radius] Two-Factor Authentication support in GNU RADIUS server
Date: Fri, 23 Oct 2015 19:20:25 +0530

Hi,

We are trying to test two-factor authentication using RADIUS server.

Two-Factor Authentication:
            * First level authentication using username/password
            * Second level authentication using the OTP

RADIUS FLOW:

User                                              NAS                            RADIUS server
Telnet/SSH to NAS 
using Username &  -------->   ACCESS-REQUEST  -----------> Authenticates Username & password
password

Prompt the user 
for OTP input       <--------------------           <-----------------    ACCESS-CHALLENGE

User enters OTP   -------->   ACCESS-REQUEST       -----------> Authenticates OTP via external OTP verification script

User logs in  
successfully       <--------------------           <-----------------    ACCESS-ACCEPT

Could you please confirm whether this RADIUS flow (two-factor authentication) is feasible using GNU RADIUS server for PAP & CHAP users.

--
Regards,
Rajeesh.R

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