Radius Authentication through a Site-To-Site VPn

[Joseph E Spoon]

I'm having issues getting RADIUS authentication to work from a remote router through a VPN tunnel back to the NPS server.

Diagram:

Remote Router -> VPN -> Main Router -> NPS

Doesn't Auth                      Does Auth

Remote Router Relevant config:

aaa new-model
!
!
aaa authentication login default group radius local
aaa authorization exec default group radius local
aaa authorization network default if-authenticated

!

ip radius source-interface Vlan1

!

radius-server host 192.168.1.2 key XXX

!

Main Router Relevant config
:

aaa new-model
!
!
aaa authentication login default group radius local
aaa authentication ppp default group radius local
aaa authorization exec default group radius local
aaa authorization network default if-authenticated

!

ip radius source-interface Vlan1

!

radius-server host 192.168.1.2 key XXX

Logs on the server suggest that it is permitting the username but I get access denied on the router.  Any help is much appreciated.

Thans

[Joseph E Spoon]

This turned out to be the key I was using for RADIUS.  It was 6 characters long.  Once I made it over 8 characters long it started working just fine.

Thanks