| Users: | L- | 
| Hints: | -R | 
| Huntgroups: | -R | 
| Additivity: | Append | 
| Proxy propagated: | No | 
Use Hint attribute to specify additional matching criterium
depending on the hint (see section Request Processing Hints -- `raddb/hints').
Let the `hints' contain:
    DEFAULT         Prefix = "S", Strip-User-Name = No      Hint = "SLIP"
and the `users' file contain:
    DEFAULT Hint = "SLIP",
                    NAS-IP-Address = 11.10.10.12,
                    Auth-Type = System
            Service-Type = Framed-User,
                    Framed-Protocol = SLIP
Then any user having a valid system account and coming from NAS `11.10.10.12' will be provided SLIP service if his username starts with `S'.
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