Is it possible to authenticate users dialing into the D56 from Cisco ACS 3.1 server via RADIUS?  My problem sounds very similar to this post...

Thread563-658459 that post, someone mentioned that they needed to change the RADIUS port numbers to something else, but didn't specify which port numbers.  I ran a utility called 'fport' on the ACS server and found that the CSRadius.exe process is bound to 5 UDP ports: 1645, 1646, 1812, 1813, and 2794.  I tried setting up the D56 to use each of those 5 ports, but it doesn't work.

I also tried using TACACS+ (default TCP port 49) but that didn't work either.  I don't see anything in any of the logs.

Any idea's on how to go about setting this up?     

Thanks,
Chris

I got this working with TACACS+.  I'm not going to get too into any details here because no one really uses Shiva stuff anymore, but just in case someone cares...

In ACS, I set up a AAA client using TACACS+ and entered a shared key called 'password'.  I also set up TACACS+ in ACS to authenticate against our  Active Directory network.  

In D56, under Configuration - Security, I select TACACS, added the IP of our ACS server, left the default TCP port 49 as is, and entered the key 'password'.  

HTH

Chris