RADIUS attribute from rfc2869

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Password-Retry

This attribute MAY be included in an Access-Reject to indicate how
      many authentication attempts a user may be allowed to attempt
      before being disconnected.

      It is primarily intended for use with ARAP authentication.A summary of the Password-Retry 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

      75 for Password-Retry.

   Length

      6

   Value

      The Value field is four octets, containing an integer specifying
      the number of password retry attempts to permit the user.

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