have created a dictionary.slipstream file with the following:

VENDOR Slipstream 7000
ATTRIBUTE SlipStream-Auth True string Slipstream

However, that will not authenticate the slip client.  If I "hardcode"
the attribute into the auth_reply query, the client is then
authenticated. (Query = authorize_reply_query = "SELECT
'','Slipstream-Auth','true',':-' FROM radius_auth WHERE Username =
'%{SQL-User-Name}'"

Any ideas where to go to get this working correctly?

 
Post the output of radiusd -X.