I have users who dial-in to an ASA and authenticate via RADIUS to a server at Site A. There is a heavily used site-to-site VPN between site A and Site B. At site B there is another RADIUS server used to authenticate users who dial-in to Site B.
The RADIUS server at site A has gone down so I've added the Site B radius server to the AAA server groups but I'm unable to successfully authenticate across the site-to-site VPN. I've tried adding explicit firewall rules as packet tracer indicates that the failure is due to the implicit ACL but still won't connect.
Any idea how to achieve this?