20.2 Interface statistics
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## 20.2 Interface statistics

The Interface statistics tab in Status → Statistics provides detailed information on volume of data transmitted in both directions through individual interfaces of the WinRoute host in selected time intervals (today, this week, this month, total).

Interfaces can be represented by network adapters, dial-ups or VPN tunnels. VPN server is a special interface — communication of all VPN clients is represented by this item in Interface statistics.

Figure 20.3. Firewall's interface statistics

Optionally, other columns providing information on volume of data transmitted in individual time periods in both directions can be displayed. Direction of data transmission is related to the interface (the IN direction stands for data received by the interface, while OUT represents data sent from the interface). Hiding/showing of columns is addressed in chapter 3.2 Administration Console - view preferences.

### Example

The WinRoute host connects to the Internet through the Public interface and the local network is connected to the LAN interface. A local user downloads 10 MB of data from the Internet. This data will be counted as follows:

- IN at the Public interface is counted as an IN item (data from the Internet was received through this interface),

- at the LAN interface as OUT (data was sent to the local network through this interface).

Note: Interface statistics are saved into the `stats.cfg` configuration file in the WinRoute's installation directory. This implies that they are not reset when the WinRoute Firewall Engine is closed.

### Interface Statistics menu

A context menu providing the following options will be opened upon right-clicking anywhere in the table (or on a specific interface):

Figure 20.4. Context menu for Interface statistics

Reset interface statistics

  This option resets statistics of the selected interface. It is available only if the mouse pointer is hovering an interface at the moment when the context menu is opened.

Refresh

  This option will refresh the information on the Interface Statistics tab immediately. This function is equal to the function of the Refresh button at the bottom of the window.

Auto refresh

  Settings for automatic refreshing of the information on the Interface Statistics tab. Information can be refreshed in the interval from 5 seconds up to 1 minute or the auto refresh function can be switched off (No refresh).

Manage Columns

  Use this option to select and unselect items (columns) which will (not) be displayed in the table (see chapter 3.2 Administration Console - view preferences).

Remove interface statistics

  This option removes the selected interface from the statistics. Only inactive interfaces (i.e. disconnected network adapters, hung-up dial-ups, disconnected VPN tunnels or VPN servers which no client is currently connected to) can be removed. Whenever a removed interface is activated again (upon connection of the VPN tunnel, etc.), it is added to the statistics automatically.

### Graphical view of interface load

The traffic processes for a selected interface (transfer speed in B/s) and a specific time period can be viewed in the chart provided in the bottom window of the Interface statistics tab. Use the Show details / Hide details button to show or hide this chart (the show mode is set by default).

Figure 20.5. Chart informing about average throughput at the interface

The period (2 hours or 1 day) can be selected in the Time interval box. The selected time range is always understood as the time until now (“last 2 hours” or “last 24 hours”).

The `x` axis of the chart represents time and the `y` axis represents traffic speed. The `x` axis is measured accordingly to a selected time period, while measurement of the `y` axis depends on the maximal value of the time interval and is set automatically (bytes per second is the basic measure unit — B/s).

Select an option for Picture size to set a fixed format of the chart or to make it fit to the Administration Console screen.

The legend above the graph shows the sampling interval (i.e. the time for which a sum of connections or messages is counted and is displayed in the graph).

### Example

Suppose the 1 day interval is selected. Then, an impulse unit is represented by 5 minutes. This means that every 5 minutes an average traffic speed for the last 5 minutes is recorded in the chart.

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20.1 Volume of transferred data and quota usage | Contents | Chapter 21 Kerio StaR - statistics and reporting