Thanks for update!As long as it is configure for inside, ASA will use inside ip for authentication request, it will send authentication request to inside subnet. Now we went back to original post: route fail, since the authentication server, whatever...

I have similar issue. Even management-access inside is configured, but if I assign authentication server outside, it still uses outside ip address for authentication. I wonder whether there is a command like Cisco router,"ip tacacs source-interface i...