# ipfw
Plugin: freebsd.plugin
Module: ipfw
## Overview
Collect information about FreeBSD firewall.
The plugin uses RAW socket to communicate with kernel and collect data.
This collector is supported on all platforms.
This collector supports collecting metrics from multiple instances of this integration, including remote instances.
### Default Behavior
#### Auto-Detection
This integration doesn't support auto-detection.
#### Limits
The default configuration for this integration does not impose any limits on data collection.
#### Performance Impact
The default configuration for this integration is not expected to impose a significant performance impact on the system.
## Metrics
Metrics grouped by *scope*.
The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
### Per ipfw instance
Theese metrics show FreeBSD firewall statistics.
This scope has no labels.
Metrics:
| Metric | Dimensions | Unit |
|:------|:----------|:----|
| ipfw.mem | dynamic, static | bytes |
| ipfw.packets | a dimension per static rule | packets/s |
| ipfw.bytes | a dimension per static rule | bytes/s |
| ipfw.active | a dimension per dynamic rule | rules |
| ipfw.expired | a dimension per dynamic rule | rules |
## Alerts
There are no alerts configured by default for this integration.
## Setup
### Prerequisites
No action required.
### Configuration
#### File
The configuration file name for this integration is `netdata.conf`.
Configuration for this specific integration is located in the `[plugin:freebsd:ipfw]` section within that file.
The file format is a modified INI syntax. The general structure is:
```ini
[section1]
option1 = some value
option2 = some other value
[section2]
option3 = some third value
```
You can edit the configuration file using the `edit-config` script from the
Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory).
```bash
cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config netdata.conf
```
#### Options
Config options
| Name | Description | Default | Required |
|:----|:-----------|:-------|:--------:|
| counters for static rules | Enable or disable counters for static rules metric. | yes | no |
| number of dynamic rules | Enable or disable number of dynamic rules metric. | yes | no |
| allocated memory | Enable or disable allocated memory metric. | yes | no |