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YfiTechAttributes

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Authors: Anonymous

RADIUS Attributes

In YFi there are profiles specifying attributes for a user.
These attributes are part of the RADIUS protocol and can be categorised in three categories.

Category
Example
Description

Check
User-Name
The username trying to connect. Sent from the NAS (e.g CoovaChilli) to the RADIUS server

Reply
Session-Timeout
The amount of time a user is allowed to spend on the network. Sent from RADIUS to NAS (e.g. CoovaChilli)

Internal (Usually Check)
Yfi-Time
An attribute which is used specific inside FreeRADIUS

Counters

There are some counters specified under /usr/local/etc/raddb/rlm_perl_modules/sqlcounter.conf. See the following as an example:

sqlcounter time_daily {
        counter-name = Daily-Session-Time
        check-name = Max-Daily-Session
        reply-name = Session-Timeout
        sqlmod-inst = sql
        key = User-Name
        reset = daily
        query = "SELECT SUM(acctsessiontime - GREATEST((%b - UNIX_TIMESTAMP(acctstarttime)), 0)) FROM radacct WHERE username = '%{%k}' AND UNIX_TIMESTAMP(acctstarttime) + acctsessiontime > '%b'"
}

To implement this counter we will specify a check attribute of Max-Daily-Session and specify how much time a user can spend daily on the network.
The counter will then return to the NAS a reply of Session-Timeout to enforce this limitation.

Using Counters in combination with Yfi-Time

We can use a counter in combination with the special Yfi-Time attribute.
Yfi-Time is a special attribute that is reset monthly and specific to YFi Permanent users.
To limit a permanent user per day you should use the Max-Daily-Session in combination with Yfi-Time and / or Yfi-Data.
If you want to only limit a permanent user daily, simply assign a large value to Yfi-Time and use Max-Daily-Session.

The feedback will then be something like the following:

    Session-Timeout
    120
    ChilliSpot-Bandwidth-Max-Down
    12500
    Yfi-Time
    "500000"
    ChilliSpot-Bandwidth-Max-Up
    12500

As you can see Yfi-Time and Max-Daily-Session can co-exists to create a flexible set-up.

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