Hi I have an issue with authentication using Freeradius (freeradius-1.0.1-3) We were running L2TPNS on a Linux box and authenticating fine using CHAP to the Freeradius server. However because of increased volume of users (DSL and Dial) we need to move to a Cisco 7200 so it could terminate the tunnel. The tunnel terminates fine but authentication is failing because the Cisco is sending PAP authentication and we use CHAP, in fact I would know how to move to PAP anyway. No matter what we put into the Cisco config it still uses PAP, even telling it to refuse PAP. The Cisco is running IOS 12.2.(6) and here is the relevant lines of config for the tunnel and authentication: ######################## aaa new-model aaa authentication ppp default group radius aaa authorization network default group radius if-authenticated aaa accounting network default start-stop group radius multilink virtual-template 1 vpdn enable ! vpdn-group 1 accept-dialin protocol l2tp virtual-template 1 terminate-from hostname tunnel local name gw1 l2tp tunnel password 7 xxxxxxxxxx source-ip 10.0.0.1 interface Virtual-Template1 ip unnumbered FastEthernet1/0 ip mroute-cache no logging event link-status no keepalive timeout absolute 4320 0 no peer default ip address ppp authentication chap callin ppp multilink ! ip local pool IP-POOL 192.168.0.1 192.168.1.254 ip classless ip route 0.0.0.0 0.0.0.0 10.0.0.254 no ip http server ip pim bidir-enable ! radius-server host 192.168.1.12 auth-port 1645 acct-port 1646 key xxxxxx radius-server retransmit 2 ############### Here is a line from the radius users file that authentication is failing for: ###### user1 Auth-Type := Local, User-Password== "jijyocspok" Service-Type = Framed-User, Framed-Protocol = PPP, Framed-Address = 192.168.2.22, Framed-Netmask = 255.255.255.255, Framed-Compression = Van-Jacobsen-TCP-IP ###### Here is the radius log entries for when the login fails from the Cisco and passes from the L2TPNS server: #### Thu Feb 16 23:30:41 2006 : Auth: Login incorrect: [user1/jijyocspok] (from client l2tp port 3) Fri Feb 17 08:22:43 2006 : Auth: Login OK: [user1/<CHAP-Password>] (from client l2tp port 3) ###### I was wondering if anyone had seen a problem like this before and found a solution. Is the Cisco at fault, does it have a bug in it? Should I just move to PAP authentication, is so how do I do that? But doesn't Windows PC's send CHAP? Would it still work? Any help would be appreciated. Thanks Tony