RADIUS attribute from rfc2865

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Login-Service

This Attribute indicates the service to use to connect the user to
      the login host.  It is only used in Access-Accept packets.

   A summary of the Login-Service Attribute format is shown below.  The
   fields are transmitted from left to right.

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Type      |    Length     |             Value
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
              Value (cont)         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      15 for Login-Service.Length

      6

   Value

      The Value field is four octets.

       0   Telnet
       1   Rlogin
       2   TCP Clear
       3   PortMaster (proprietary)
       4   LAT
       5   X25-PAD
       6   X25-T3POS
       8   TCP Clear Quiet (suppresses any NAS-generated connect string)

        FreeRADIUS Vendor-Specific dictionary values:

                    0 - Telnet 
                    1 - Rlogin 
                    2 - TCP-Clear 
                    3 - PortMaster 
                    4 - LAT 
                    5 - X25-PAD 
                    6 - X25-T3POS 
                    8 - TCP-Clear-Quiet 
            

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