The Clients tab allows you to add, remove, or edit the Internet addresses, DNS names, and passwords (also called shared secrets) of the clients of this IAS server. Clients can be NAS devices or RADIUS proxies.
Note
Passwords (shared secrets) are case-sensitive. Be sure that the client’s password (shared secret) and the password (shared secret) you enter in this field are identical to each other and conform with the password (shared secret) rules listed in “Deploying Internet Authentication Services.”